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Nissan Quest/Mercury Villager Starting & Stalling Problems



  • nissanquest94's information makes sense and and may allow me to keep driving because I can't afford to replace all the parts that the auto repair guys guess is my problem. Each one has a different solution and they all cost several hundred dollars. Thanks nissanquest94!
  • Your observation is correct, but do you know why I still replied to that post?

    For one reason, we have the same twin van 94 that I know it well; it is a perfect van when I bought it new because my Bell Labs colleagues highly recommend and it was ranked #1 van by JD Power in that year. It is still very good after 17 years, and it really did NOT have all sorts of problems auto mechanics guess in this forum, but, as you may not know, "water in the tank" problem is for all vehicles, even boats, container trucks, ...etc.

    And for another reason s/he mentioned had read thru hundreds of all posting in this Nissan Quest forum and got NO useful solution to his or her problem. So, I feel if I documented here in detail, future members who may soon or later encountered this water problem can benefit from with little cost.

    I have a friend who is auto mechanics who used to make $5 changing oil on demand at client's driveway or even on roadside in New York City. Ever since he learned the tricks from Toyota Dealers, now he already became millionaire and fix cars in his backyard home garage.

    His money making trick is very simple. He ofters EVERYONE referred to him a "free check up", Once people come to his home garage, one at a time go by appointment and everyone thinks his only repair as leisure for friend referral, he would ALWAYS find something to REPLACE, and he shall give you a list to be replaced in the future and REPLACE ONLY ONE part that cause hundreds.

    He would not do any job making money at lower than $250 an hour. e.g. he will kindly refer all to Costco, BJ's or Sams Club for CHEAPER tire replacement. He would even refer people to change oil at Lube Express, Valvoline, Mobile Express ...etc. He would not service old car older than 96 when OBD II (On Board Diagnostics) not works.

    For every car comes to him, he would start REPLACING part by part along the time till ALL parts REPLACED. Eventually, always need to replace "transmission" which cost thousands and he would advise you to buy new car.

    He would always replace dealer parts or expensive parts and easy to replace with less labor time to replace but charges same labor hours.

    His wife would go to all sorts of groups like churches, schools, ...etc and invite all she knows to come to home for "free check up". And when new friends come visit, she would invite them to her nice living room, kids play games, free drinks, cookies, ...etc while husband checking the car, and as you know, unless your car is brand new, he always can find you some parts to REPLACED.

    Recently, I saw a news that police found an auto mechanics fraud in New York City and found $700,000 cash in the house (yes! $100 bills), I thought about my friend right away because he would charge you sales tax if you pay check, otherwise, if you pay cash, no tax. Where are all these cash go?

    I mentioned this story to show all who are good in auto repair how to make huge profit like my friend and became millionaire in just a few years. Of course, I also want to show those who do not have deep pocket how to save money.

    nq 94, your are replying to some posts that date back to 2009. Those problems have either been taken care off or the vehicles might have even been sold. Just an observation.
  • As you may not know, I constantly talked to people I encountered with old cars whenever I met in park, Walmart auto parts, Pep Boys, Auto Zone, Advance Auto Parts, ...etc as if I were doing a rigorous research subject, not to mention doing lots of searches over Internet.

    For example, a guy working at Advance Auto Parts, when I brought up this question, he suggested that my alternator needed to be replaced. So I asked if he knows how to check if an alternator is good or bad, he said he did not know. So I showed him how. Just use digital voltmeter to measure battery at cold to see if it is 12.66v that he knows, and start the engine, to measure again to see if it is over like 14+v that alternator is charging and not over charge at 15 or 16.

    Another one I encountered at Pep Boys who told me IAC sensor needed to be replaced ...etc. Yet another senior mechanics came close to show me "dry gas" product, valvoline 12oz bottle at $3.99, rather than showing me Heet 12oz at $1.99, not to mentioned the undisplayed Splash at 99 cent 10oz bottle.

    So, if you really want to save money, you need to have sufficient information.

    When I asked to buy AuqaSocks I was told they do not have; they do not even know what that is, so I had to explain to them.

    nissanquest94's information makes sense and and may allow me to keep driving because I can't afford to replace all the parts that the auto repair guys guess is my problem. Each one has a different solution and they all cost several hundred dollars. Thanks nissanquest94!
  • rockmobilerockmobile Posts: 115
    edited June 2011
    Oops! did not know nissanquest94 had a silent audience. Good to hear some 94 Quests are still chugging right along.
  • Yep! and you shall see more because I start sending this Nissan Quest forum to current Nissan Quest owners and prospective owners such as this one

    When you one day planning to sell your Nissan Quest, you may find the solutions in this Forum helps a lot.

    And, if you planning to buy a "newer" Nissan Quest, you may find the best value price year may be 2004 for year 2011. Why? Because most people in this country finance to buy new car, and in the good old days when new car was not that expensive, people got car loan of 4 or 5 years, but as new cars getting more expensive, in order to keep monthly payment affordable, people start getting 6 years car loan.

    So, once the car loan paid off after 6 full years, many car owners who has little knowledge about cars may simply sell it with the proceeds as down payment of next new car to buy, so all of a sudden, the used cars with 6 to 7 years old are all over the place. as you can see nAsk=&maxAsk=

    Now, when you see so many 2004 van's for sale, but the price varies so much difference, you may go ahead to get the one with best price. Why? Because now you know Nissan Quest is a great van with a forum behind you, and you know the solution of the water problem that most of others do not. For those much higher prices vans, they may have been "over serviced by dealer" or "replaces many parts unnecessarily", you do not want to pay couple thousands of dollars for that. And, you shall find your capital cost of owning a reliable Nissan Quest 2004 for 10 years is very cheap, only $550 (e.g. $7,000 - $1,500 = $5,500, and $5,500 / 10 = $550). I mean if I sell my Nissan Quest 94.

    What do I mean for "over serviced"? If you listen to dealers to tell you change oil and oil filter every 3,000 miles, your car is over serviced. If you look at your Nissan Quest manual, it tells you to do it at 15,000 miles. All these extra cost spent on a resell Nissan Quest 2004 may reflects on the price. Believe or not, my Nissan Quest 94 has not changed oil and oil filter for past 3 years, and as more car owners I talked to, I get to know it better.
  • Mine has not changed since 2008 and running great; I am wondering if anyone has longer record.
  • When I was at Berkeley many years ago, I was told to change oil and filter every 3,000 miles or 3 months, and if I just changed oil but not oil filter, the oil will get dirty right away. Unfortunately (or lucky?) one time I changed the oil but was not able to removed the oil filter, so what should I do? I was very worry and add the new engine oil and "monitor" the oil change every day. One day, two days, one week, two weeks, ...etc the result was "new oil NEVER get so-called dirty like the rumor says!!!". So, I decided NOT to change oil filter every time I change oil; everything has been great, save some money and hassle.

    Later on I bought a brand new Toyota Corolla 1990, and I decided to follow the manuel to change oil every 7,500 miles and 15,000 miles change oil filter, and it has been great too. So every time I heard people saying "change oil every 3 thousand miles or 3 months", I knew it was a long history myth. Yes, my Toyota Corolla 1990 still alive running very well, and I have not used up the case of oil filters I bought at $1.99 each when I bought the car.

    One day, I asked the owner of a local auto repair service why they tell their customer to "change oil every 3 thousand miles or 3 months", I told him never need to and my car running very well not doing so. He finally admit that "everyone else says so, we have to say the same thing, or customers may think we are NOT professional..."

    So, I told him my other friend making huge profits as at home auto mechanics, always recycle engine oils and "add last quart of new oil" when customers came change oil at only 3 thousand miles or 3 months. As soon as he heard this, he got excited and told me how they did in New York City. He said since there is no need to change that often, and engine oil changed still very clean, so they just "drain one quart of the engine oil at the bottom and add just one quart of new oil on top", when show customer with the dipstick, it always show the top level of clean engine oil just added, and customer happy.

    When I told him even engine lose one quart of oil, the low oil light may turned on but engine still run fine; it may overheat when two quarts loss. He said had seen a customer commute 100 miles a day and came to change oil of his Honda Civic with only one and half quart left in the crankcase.

    I like this one very much that gives you very clear picture of how engine works, in particular, how crankshaft working with engine oil. If you also understand that "new and clean oil is lighter and will be on top of oil tank, and dirty oil is heavier will sink down to bottom", you eventually will develop a very cost effective way of maintaining your engine oil and oil filter.

    My understanding is that engine oil eventually "get thicker" due to heat and chemical reaction, so every 3,000 to 5,000 miles, when you check your dipstick, you see missing 1/4 quart or so, if you follow the manual and change every 15,000, you may lose about one quart. So, if I do not change oil, but "add a new quart of 5W30 on top" I should be fine, and the engine started using the new clean engine oil. But if I have some time, I top up the engine oil every 3,000 to 5,000 miles that even better. No need to change engine oil, nor oil filter.

    Eventually, after many many years, as you can guess the bottom of oil tank will accumulate very thick oil just like gas tank accumulated water, but I know I can remove the water using "water remover" such as Heet or Splash to fill in the gas tank, how would I remove the thicker engine oil from oil tank other than changing oil the traditional way? I found this Engine Restorer very interesting.

    Last time when I needed to add more oil to my crankcase, instead of adding 5W30, I add a can of Engine Restorer for 6 cylinder. Wow! Amazing! the engine became quiet and quiet every day and every trip till eventually the engine is like new, so quiet, sometimes, could not tell if engine already started!

    Even more interesting, the oil in the oil tank became cleaner and cleaner as if the whole chemical reaction has been reversed. And, of course, the mileage seemed to increase a bit. One senior auto mechanics even said, of course, it is like the Sea Foam thinner. Anyway, after a while when I need to add more engine oil, I added some 5W30 as Engine Restorer $9 is much more expensive than 5W30 oil $2. But now I feel great that my engine is perfect and I have much less worry of my engine as I can use Engine Restorer in the years to come when I wanted to, either engine noise higher or oil darker.

    My goal is to keep my Nissan Quest 94 running as long as possible and as good as it was new. In the mean time, try not to touch "screw", and avoid "auto surgery" to replace parts unnecessarily.
  • Our Walmart never carried Heet for "water removal", and I had to got to Pep Boys to get this yellow bottle 12oz $1.99 or Advanced Auto Parts $2.29. Not long after I started talking about Heet, tonight I found dozen of yellow Heet $1.37 and red Iso-Heet 12oz $1.99 ($2.99 in Pep Boys and more in Advanced Auto Parts) at Walmart auto pharmacy department.

    I was very excited to pick up a bottle of red Iso-Heet 12oz $1.99 to pour into my half empty tank of Nissan Quest 94, started losing power again as gas tank going toward half tank. On the way home, wow! the power was increased a lot, I can feel the power even more than the yellow Heet bottle I used before. The red Iso-Heet claimed to have 5 times more "water removal power", and I feel the "throttle response" much more instant and powerful.

    While I was there, a family with 2 kids told me their Toyota Avelon 98 had the problem. After asking some questions, I advised them to buy yellow Heet, two STP red bottle and two STP white bottle and one Engine Restorer for 6 cylinder, and they also got bottle of a/c to refill their not so cool a/c.

    I believe Auto Pharmacy is the future.
  • steverstever Posts: 52,462
    I went 15,000 miles and over a year on my last oil change. Probably a bit much.

    When I lived further up north, my wife would buy a bottle of yellow Heet now and then. After I yelled at her a couple of times, she quit putting it in the tank. Always heard that the yellow stuff was bad for hoses or something like that.

    I don't think much of additives beyond what the oil companies toss in their gas.

    Just burned a tank of gas yesterday and the van is pushing 157k.

    Steve, visiting host
  • I just double checked my Nissan Quest 94 manual, and it says in normal driving situation, change engine oil every 7,500 miles and oil filter every 15,000 miles, so you seemed to be doing correctly.

    As said, as time goes, the engine oil gets thicker and the volume shrink, so if you change engine oil and oil filter together at 15,000 miles, the old flushed engine oil may be 1/2 to one quart short. Does it trigger "low oil light" ?

    I have found it helpful to add some new 5w30, the recommend engine oil by Nissan Quest 94 manuel, to top it off every 3,000 or 5,000 miles or whenever convenient. And, when engine gets noisy, for every 50,000 to 100,000 miles, instead of adding 5w30, I may add a can of Engine Restorer that magically quiet down the engine to like no noise and thinner the engine oil and smell much better.

    And when change oil and filter became once a year or two job and more affordable, I just use the drive thru service like Valvoline, Lube Express, Mobile Express or the like. And, I found this "low oil" light seemed to be a good reminder of either top off engine oil with 5w30, or with Engine Restorer, or with drive thru oil change service.

    When you use these drive thru oil change services, remember to just change oil and oil filter. If they tell you to do other things, just ask for a list of work they suggest and do NOT do it right there. It often very expensive, and could cost you a lot.
  • nissanquest94nissanquest94 Posts: 81
    edited June 2011
    According to Heet's website, "HEET contains special additives and methanol. When HEET is added to the gas tank, it sinks to the bottom and mixes with any water. Since both HEET and water are heavier than gasoline, they go to the bottom of the gas tank. HEET absorbs water and keeps it from freezing, and blocking the flow of gasoline through the gas line and fuel pump. When the vehicle is started, the additives, methanol, water, and gasoline are consumed during combustion inside the engine." So, the power of "water removal" comes from "methanol" which is well known.

    In Wiki Methanol, it says "One of the potential drawbacks of using high concentrations of methanol (and other alcohols, such as ethanol) in fuel is its corrosivity to some metals, particularly aluminum. Methanol, although a weak acid, attacks the oxide coating that normally protects the aluminum from corrosion:
    6 CH3OH + Al2O3 → 2 Al(OCH3)3 + 3 H2O
    The resulting methoxide salts are soluble in methanol, resulting in a clean aluminium surface, which is readily oxidized by dissolved oxygen. Also, the methanol can act as an oxidizer:
    6 CH3OH + 2 Al → 2 Al(OCH3)3 + 3 H2
    This reciprocal process effectively fuels corrosion until either the metal is eaten away or the concentration of CH3OH is negligible. Concerns with methanol's corrosivity have been addressed by using methanol-compatible materials, and fuel additives that serve as corrosion inhibitors."

    In other words, you need to have "high concentration" of methanol to cause corrosion, and Heet seems to contain corrosion inhibitors. That's why we do not just pour "methanol" into the gas tank to remove the water in tank.

    It also says "Low levels of methanol can be used in existing vehicles, with the use of proper cosolvents and corrosion inhibitors. The European Fuel Quality Directive allows up to 3% methanol with an equal amount of cosolvent to be blending in gasoline sold in Europe."

    Heet website also says "One bottle of HEET treats up to 20 gallons (75.7 L) of gasoline. You should not use more than 2 bottles in a 20-gallon (75.7 L) gas tank, 3 bottles in a 30-gallon (113.6 L) gas tank. HEET and Iso-HEET are safe to use in every tankful, in all seasons, all year-round." In other words, each bottle is 12oz and one gallon is 128oz and 10 gallon is 1,280oz; with one bottle Heet in 1,280oz gas, it is under 1% of methanol concentration, much less than European Fuel Quality Directive allows.

    Anyway, since I am using yellow Heet bottle 12oz to remove water from my Nissan Quest 94, I am wondering if any of you ever encountered any problem using it with your cars or vans?

    #410 of 411 Re: How many miles do you change oil and oil filter with you Nissan Quest? [nissanquest94] by steve_ HOST
    Jun 29, 2011 (8:04 am)

    Replying to: nissanquest94 (Jun 28, 2011 1:13 pm)


    When I lived further up north, my wife would buy a bottle of yellow Heet now and then. After I yelled at her a couple of times, she quit putting it in the tank. Always heard that the yellow stuff was bad for hoses or something like that.

  • steverstever Posts: 52,462
    I check the oil about every time I fill up, and I don't remember ever adding oil. Probably stays topped up from the water condensation getting in the oil. :shades:

    Never seen the oil light come on except at start up when all the idiot lights come on.

    Filters are cheap so while I'm under there changing the oil, I just change it at the same time. Don't trust the quickie places all that much, and if I get lazy, I have a regular mechanic I'd rather trust for working on my van.

    And, like HEET, I don't believe in adding any additives to the engine oil either. Haven't checked my manual, but I know that GM and other manufacturers specifically warn against doing that. Plus I don't care if the oil smells like roses since I'm not sniffing the dipstick. :D

    About the only additive I trust is Techron, and while I'll buy Chevron gas now and then (it has Techron in it), I won't go out of my way to get a bottle.
  • rockmobilerockmobile Posts: 115
    Oil is cheap. Filters are cheap. I do my own oil and filter change every 7500 or 8000 miles, that way I let it drip the old stuff at my heart's content.

    I never add anything to gasoline but I can't argue pro or against it. That 10% ethanol/gas mix has kept my throttle body clean so I have not had to clean it in a while.

    _Rusty 99 Quest :cry:
  • steverstever Posts: 52,462
    edited June 2011
    Now that you mention it, it has been a long time since I've had to clean my throttle body. Hard to believe that the ethanol laced stuff is good for anything but there you go. The ethanol free station here is usually twenty cents a gallon higher and isn't convenient anyway.

    Probably doesn't matter much, but it is kind of satisfying to pull the oil plug and let it drip for an hour or two. :-)

    An oil and filter change usually runs around $14 for me.
  • rockmobilerockmobile Posts: 115
    Wow, $14 is really a bargain. I can't make it for less than $20.
  • When you check the oil every time you fill up, did you check BEFORE drain the oil? or AFTER fill up the new oil? How does it look like? and did you check the dirty oil that you drain out of the oil tank? I mean, did you notice the "volume" of the dirty oil actually shrink? and how much loss? for that 15,000 miles. Yours may not have loosed too much because you said you never got low oil light on, but it may be useful to know how much quart loosed.

    Mine Nissan Quest 94 had engine oil leak since dozen years ago, and the dealer I checked wanted over $1,000 from me to repair. Basically, their reason is that it was a gasket needed to be replaced, but it cost huge of labor to reach that gasket and reassemble, and they wanted me to leave the van with them for a few days. I never have them did anything because in my mind, if the auto mechanics can NOT get the job done in an hour or two, they did NOT know how to do it correctly, may be they did not have experience on the problem, or they simply do it brute force. But, it is hard to reason that dealer has no experience nor need to do it in hard way; the only thing I can think is that they want to charge you more by asking you to leave the van there to make you feel they spend more time on doing your car, which they don't.

    Anyway, thereafter, every few months my "low oil" light would come on, depending on how much I drive; it did not seem to leak oil when it is parked still, but it may leak during driving and pull into parking. And, I always had a quart of engine oil in my van, as soon as the light came on, I just add one quart, and the light went off right away. Then I kind of lose the hassle of changing oil because every 15,000 miles when I checked my engine oil, the dipstick always shown very clean. And, of course, I also lost the hassle to change engine oil filter.

    Many years later, I noticed it took longer and longer for the "low oil light" to come on, and eventually it kind of not come on any more naturally. When I mentioned this to a local auto repair owner one day, he said, of course, as the engine oil got thicker and thicker, eventually, it would seal the leaking gasket by itself. So, then instead of adding a quart of engine oil whenever "low oil light" on, now I need the oil change again, and that's why last time I changed in 2008.

    Since I have been so used to not bother with oil change, and I kind of forgot needed to, but it seemed fine, except, every so often, like 3,000 to 5,000 miles, I just top off 5w30 till recently I found this Engine Restorer while search for solution to fix the "water in tank problem", and add the whole can to top off the engine oil and got all the wonderful effects as mentioned in testimonials. I thought at the time the problem may have caused by not changing oil since 2008, but it turned out is not, but I am very happy to the positive effects gained.

    Engine Restorer advises to add every time do oil change; however, I was in the situation either to see auto mechanics or solve the problem myself, so I did not do oil change, instead, I just added a can into my crankcase to top off the engine oil which looks dirty at the time.

    Then, the magic happens immediately. The first try to drive, I felt the engine gets calmer, and through out the way, every day the engine quiet more. Until one day, my wife asked me why our Nissan Quest 94 engine was so quiet, what did I do? And, also another day when my son trying to start the engine when it was ALREADY started; he could not hear the engine sound. Now we have to rely on the RPM meter to tell if engine started or not. While driving on the road, if we open the winter, we, in fact, hear other cars' engine noise, but not ours. How amazing!

    Before using it, every time I pull the van into driveway, my wife noticed the bad smell when engine stopped, but after using Engine Restorer, the bad smell gone. It was not the smell of engine oil, I think it was the bad smell of exhaust. Then, I notice when I started the engine in the morning, I got NOTHING smoke came out from the exhaust pipe but some water about an oz or two.

    From then on, I tried to locate Engine Restorer wherever I went and took down the price. I have found so far the best prices of that same Engine Restorer of 3 sizes, 4 cylinder, 6 or 8, Walmart seemed to be the cheapest. And, that's great! because we travel a lot, about 150 nights in the hotel each year, so any time we had a need to use Engine Restorer to top off engine oil, we know where to find at best price.
  • steverstever Posts: 52,462
    edited June 2011
    You can't tell anything by oil just by looking at it. It's supposed to hold stuff in suspension so it's not unusual for it to turn dark right after you change it.

    No, don't bother looking at the dipstick when I change my oil.

    And again, I don't believe in putting additives in my van. Testimonials don't really mean squat to me - if you truly want to know the condition of your oil (and thus your engine), pay the ~$20 for an oil analysis.

    With all the restorer links in your post, you sound like you're shilling for the company. Are you getting kickbacks from Heet too? Lot of good your restorer did if you have leaks. ;)

    Steve, visiting host
  • Most people can not tell anything by just looking at it, but I can because I look at it every day. Sometimes, I checked it before my wife needed to drive to work, and sometimes, I just check it for no reason.

    But as you may not realize, when the car is cool down and engine running and after driving 100 miles, the engine oil all look differently. When it is cook down over night, the lighter part of engine oil move up to top like gas on top in gas tank and water down to bottom in gas tank. However, while engine is running, it all mess up together. In other words, the most accurate state of engine oil is when engine is running.

    On the other hand, I never seen engine oil turn dark right after change it. According to my friend who hold Ph.D from Columbia University on Chemical Engineering, the molecule of new engine oil is of pretty good size for engine, however, after heat and a series of chemical reactions, some molecules will be combined to longer ones, yet others may be chopped into small ones, both would reduce the operating power of the engine. Therefore, the synthesized oil is better, in that the molecules were made artificially all in the good same size. It is, therefore, new engine oil should NOT turn dark right after change. If it does, you can be sure the auto mechanics pour into old engine oil from previous guest into yours, or another auto repair shop owner just let go one quart and top off one quart of new clean oil.

    So far, I only used one bottle of yellow Heet 12oz $1.99 bought at Pep Boys, and another yellow bottle of Splash 10oz 99cents also from Pep Boys when they ran out of yellow Heet. I did not buy more yellow Heet as Splash is cheaper, however, for some reason, Pep Boys told me they did not have Splash any more. Advanced Auto Parts got yellow Heet but $2.39 and no Splash. Eventually, I found yellow Heet 12oz $1.37 at Walmart, but I also saw red Iso-Heet there at only $1.99 that Pep Boys wanted $2.99 and Advanced Auto Parts want more. So, I just tried Iso-Heet which claimed to remove water 5 times more.

    Some people claimed to be able to use pure methanol instead of yellow Heet and it is less than $20 for 5 gallons, about $4 per gallon, or 40 cents per 12oz. I am new to this "Auto Pharmacy" field, but I intend to be one of the best, not only on prescribed auto pharmacy (or additives, the generic term you used) but also "most cost effective" as the 100 year economic situation, over 14 millions people lost job and yet no car is not an option in this country. If we can help just a few % of these people, we helped lots of them.

    For example, they can get a really used unwanted car for just a few hundreds, and pour some correct "auto drugs" into the cars, and boom, it running great again!
  • steverstever Posts: 52,462
    edited June 2011
    Yeah, the tribologists talk about how the molecular tails are all broken off by 3,000 miles. Big whoop.

    Even the fleet owners won't mess with that stuff; they get their best bang for buck by doing an oil analysis and extending the intervals as much as they think they can get away with.

    And you know what? For us poor slobs just driving around it's not going to matter one whit.

    If you want to be an oil change hobbyist, fine, just remember that few hobbies are cheap. Big waste of time and money for the rest of us.

    You might enjoy this discussion btw:

    Engine Oil - A slippery subject Part 2
  • Pep Boys this week in our area has promotion $14.99 for a set of 5 quarts Castrol GTX engine oil and Purolator oil filter which is $18.99 after $4 manufacture rebate, and I also see this in their website, so I believe it is corporate wide, or by manufacture promotion.

    I believe the price shall continue dropping because people start realize "3,000 miles or 3 months oil change" is a way outdated Auto Historic number. In the good old days, many many years ago, the engine oil tank is NOT 5 quarts like our wonderful Nissan Quest 94. It was only ONE quart. That is to day, if one quart of engine oil lubricates engine for 3,000 miles or 3 months, then we need 5 quarts of engine oils if we do not want to bother changing oil every 15,000 miles. And that's what manual says.

    Unfortunately, people kept remember that "3,000 miles or 3 months" phrase but did not realized the oil tank has been increased to 4 or 5 quarts along many decades. On the other hand, people who do not know all this theory and history may still change oil frequently as long as the cost is kept low.

    I passed Good Year the other day, the oil change now $9.99 as opposed to many who charged $29 these days. And PepBoys also gives you up to $10 on oil change service this week.
  • steverstever Posts: 52,462
    edited June 2011
    I paid $10 for a jug of Supertech at Walmart not long ago, and the Fram filter went for ~$4.

    $10 at a quick lube is cheap. Just check their work before you drive off. :shades:

    Your "one quart" theory looks good, but my daddy had a '53 Buick - a Special I think it was. Chiltons says the oil capacity for the Series 40 and 50 was 9 3/8 qts dry, 11 3/8 quarts dry for the Series 70. 10 quarts for a drain and fill. Same for the 1940 Buicks.

    The Model T held 4 quarts standard. Apparently some drivers used 5 quarts if there were a lot of hills. :) The 1928 Hudson held 7 quarts of oil in the reservoir only, 9 qts. counting the troughs. (link and pfd link)

    One theory I always heard was that the 3,000 mile interval was adopted by the Army motor pool back in the First World War. Never seen any verification for that theory either.
  • Since you mentioned Techron is the only one you trust, I went checked on it, but it was very expensive, $8.29 each at Pep Boys; however, I am glad to see it has promotion of $5 this week. I am going to get one and try it out on my Nissan Quest 94.

    What I was not sure about is, can I add this Techron 12oz into my gas tank which already has yellow Heet bottle 12 oz, Splash bottle 10oz and Iso-Heet red bottle 12oz ? and it says combine with Chevron gasoline, do I need to get Chevron gasoline while adding Techron? But you also mentioned that "Chevron gas has Techron in it", so you did not need to get a bottle ??? So, should I just go get the Chevron gas ???

    Anyway, I am going to give it a try as the Top Tier Detergent Gasoline says, Demonstration of Performance. A demonstration of injector fouling shall be done first. At least five out of six injectors (with Option 1) or at least four out of six injectors (with Option 2) shall be inoperative for the test to be valid. A demonstration of additive performance shall be done after the fouling tendency demonstration; no other test shall be conducted on the vehicle in the interim. A demonstration of additive performance shall be conducted using the same vehicle (including the fuel drain and flush procedures and installing new injectors) with the same batch of base fuel, but now containing the same amount of deposit control additive as in A pass is defined as no more than one inoperative injector.

    and Chevron gasoline with Techron seemed to pass it.
  • steverstever Posts: 52,462
    Yeah, never bought it. Used to buy Chevron a lot. No stations around me now. If my throttle body got gunky, I might try a bottle.

    Top Tier is okay I guess, but really it's mostly marketing. There's at least one competing organization that makes similar claims.
  • I wanted to get Chevron gas tonight, but no stations around me either, so I searched for the list of Top Tier Detergent Gas Stations and with the help of Gas Buddy, I found an affordable Exxon gas station for $3.39 a gallon which is pretty good. At the gas station, it says "containing ethanol", so I think it may deal with water problem.

    As predicted, short while after I left Exxon gas station, the power restored and idle much smoother at stop and traffic lights, and when going to high way, it runs much more powerful, and transmission smoother, especially from gear 1 to gear 2, not need to be too high RPM to switch, so everything back to normal.

    The magic of red Iso-Heet 12oz I got the other night at Walmart seemed to be phasing out as the gas tank approaching 1/3 and miles over 200. I think, after all, even the 5 times of water removed was only about 60oz, about half gallon that only gives me about dozen miles of magic. That also explained why yellow Heet 12oz gave me an even shorter magic because 12oz of water removed, only burn about a few miles. Not to mention the 10oz Splash.

    If the First Tier Detergent Gas can also clean "fuel injectors" as can make most inoperative fuel injectors back to operative, then, it is true that no need to get a bottle of STP fuel injection cleaner or other brands' similar product.

    So, I think, this is at "Auto Nutrition" level; i.e. charge battery with electric charger, get good gas, and get clean air into throttle ...etc.

    So far, not quite sure of the magic of Exxon except knowing the % of water is sure to drop below the threshold after fill up, and with Exxon gas "containing ethanol", more water will be mixed and burned, and since Exxon is also in First Tier Detergent Gas list, the fuel injectors should be all operative soon with no misfires on that part. I expect the "check engine" light should go off any time soon ...
  • This is very interesting! Why old cars need that many quarts of engine oil? I need to check with my friend holding Chemical Engineering Ph.D from Columbia University. May be I heard it wrong at the first place. But, it makes sense that military always set higher standard like government or emergency vehicles or police...etc. They change battery every 3 years, no matter what.
  • True. I checked that forum on engine oils ...etc. Lot's of detail and exceptions, but kind of lose focus. I think, I need to focus on Nissan Quest vans, and the goal is really simple. Try to do minimum work on oil change at minimum cost while keep the van running well.
  • steverstever Posts: 52,462
    May be I heard it wrong at the first place.

    I think there's a lot of wrong info out there.

    And I don't think you can fill up, drive off, and immediately notice a difference in how your car drives. That's seat of the pants stuff and like a lot of those testimonials you read, it's a self fulfilling prophesy kind of thing. If you don't have a baseline to begin with and some method of actually measuring improvements (other than your gut), then it's all hogwash.
  • rockmobilerockmobile Posts: 115
    nq94, I think your Quest is old and tired and needs a little Redbull for automobiles, though I hope you can keep it running for ever.

    But, I was thinking that by switching to a higher octane you could get the same benefits you get from all those additives, although at this time it may be cheaper to increase power with the concoction you are putting in the tank.

    Can you tell us how many miles it has and how many you run in a year?
  • I got over 135,000 miles on this Nissan Quest 94, I run many miles in the early years, and gradually reduced each year, so for past 17 years, it average less than 10,000 miles a year as you can see.

    I am going to take your advise to switch to higher octane next time when I get Exxon. The 87 regular was $3.39 I got last night, but 93 super was $3.79, so I did not get higher octane, but as said, my van already did very well right after I drove off Exxon gas station. This time, I did not add Heet nor Iso-Heet as I saw it says "containing ethanol", and since Exxon is also in the Top Tier Detergent Gasoline, it seems I do not need to add "fuel injector cleaner" and other additives, assuming it already has them.

    Today, I drove another 40 miles, and it ran very well, so I think good gas does make some difference, and next time I will try higher octane that my Nissan Quest NEVER had the luxury to add them.

    According to Wiki, higher octane will prevent fuel vapor to burn prematurely and therefore reduce the "knocks", and of course, will make knocks sensor happier and may be get "check engine light" off. Normally, new car does not need high octane, but older cars does need it. Why?

    Because, in general, the senors of fuel system tend to be able to monitor and ECU got the info and rearrange the time for all adjustment, whereas, as cars get aging, all these sensors may be getting dirty and the info sensed NOT as accurate and therefore not able to reduce all knocking. So, higher octane gas, by nature, less like to burn prematurely. It shall burn at the optimal spot right at the highest pressure of compression stage, and not loss power this way.

    So, with that knowledge, I can tell by adding different gas to see how clean my fuel sensors are. Otherwise, auto mechanics would just blindly ask you to replace at your expense, whereas, many can be just clean, or not even dirty.
  • What I did has been change ONE thing a time, so I know EXACTLY which is which.

    The savvy father I met at Pep Boys got 3 Nissan Quest, and, now he is expert on Nissan Quest. His way of learning is very simple. If one has problem, you would ask opinion of auto mechanics, and if they say need to replace new sparks, he would just come home and SWAP spark plugs with two vans, and see what happen.

    If problem of problem van remain, he knows that suggestion was NOT correct. Soon or later, he shall know which auto mechanics knows more, and eventually, he knows how to replace all these parts as well.

    And, eventually, his comment is that Nissan Quest is very good van, and most guess from auto mechanics, at least the local ones he went, was INCORRECT.

    I am doing the same thing to try out every one in the forum may suggest, and I would be able to tell which are the solutions, and which are just guess. But, to me, I am trying to fix the van at "auto Pharmacy" level (or additives) and "auto nutrition" level (i.e. right gas, right electricity, right air ...etc).
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