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Fuel and Oil Additives



  • yzfyzf Posts: 65
    Chevron's Techron additive (found in most auto stores and big retailers with auto sections like Target) is the only stuff I've found that really works - at least on my motorcycles. I've definitely noted increased fuel economy and smoother function. Things like that are very noticable in motorcycles because of the proximity of rider to engine. That and the fact that I tend to do all the maintenance on my bikes whereas the shops get the cars.
  • jmsintxjmsintx Posts: 41
    BMW did studies way back when I was still young and hands down the Techron removed carbon from valves, pistons and opened up fuel injectors. Now, this was 10 years ago and there might be some that work just as well. I have used Techron since I can remember and have cured many a starting-rough idling problem.
  • ywilsonywilson Posts: 135
    I drove across country in a SAAB 900 I used to own. I used nothing but Chevron gas during the whole trip. When I got to Oregon the car was running better than it was when I left. I was familiar with the Techron in the fuel and I was convinced of it's abilities after my trip. I now use it in my trucks twice a year to keep the fuel system clean. I have no complaints on it's ability to do the job.
  • armtdmarmtdm Posts: 2,057
    I use Techron once in a while and on three cars I put the concentrate Amsoil PI in every tank. Does it work?

    Who knows,

    Never had an issue with fuel sytems on any car in last 6-8 years but would I have had any anyway?
  • I've tried many of the cleaners available. A couple of weeks ago I tried a bottle of Texaco's synthetic cleaner. It seemed to have worked very well. The engine seems to idle smoother and start quicker. Just a thought...
  • I've used Marvel Mystery Oil for years and have been very happy with the results. I do agree that Chevron's Techron additive is also good.
  • regfootballregfootball Posts: 2,166
    whenever my old 95 tbird used to start to idle sloppy and hard and suck a bit more fuel, and run tank with concentrated additive and a long drive did the trick. Sometimes a second treatment was necessary. But then after that the rough idle was gone and the mpg was back up where it should be.

    Never any related reliability issues etc.

    I highly recommend a treatment 2 times a year.....
  • Another reason to run an upper cylinder lubricant / cleaner in the fuel on a regular basis. Fuel system components (carbs, fuel injectors and pumps), need lubrication along with the valve guides and rings. In addition, the tips of the fuel injectors need to be kept clean. Any "baked on deposits" will alter the spray pattern on the injector. The fuel today is "dry" in terms of a lubricant. As I have stated on earlier postings, I use "Marvel Mystery Oil" (4 ounces to each 10 gallons of fuel) on a regular basis. I use this product because it is "reasonable in price", ($3.00 a quart K-Mart / $4.00 a quart in Pep-Boys), in my area of the country, and it does the job. I have used this product in all my Honda vehicles, (1997 Accord, 2000 Accord, 2000 Civic, 2003 Accord & 2004 Civic), and I have never had a fuel injector / fuel related / valve problem. YES, it is safe for the 02 sensor and the Cat converter. I also use this product in the fuel my 1999 MerCruiser 7.4 V8 marine engine and my 9 hp snow thrower. I have friends that use this product in the fuel of big oil injected outboard motors. I am not trying to start a debate over this issue, because I know that many people feel that this type of product is not needed, and a waste of money. I am just offering this information as a public service. My Honda dealer will add a fuel additive for the injectors at certain intervals of service. In addition, it is very important to use gas stations that pump "quality fuel", and sell "large quantities" quickly. Never purchase fuel from a station that is getting a fuel delivery. The incoming fuel from the tanker truck is churning up the tank in the station. You could be getting all kinds of contaminents in your vehicle's tank. -----Just my opinion. ----Greg
  • nw1997nw1997 Posts: 227

         Great post. I totally agree with you in regards to using a quality grade gas. I mostly purchase from name brand stations, such as Mobil, Shell, etc. I also agree with you on not getting gas from a station that just got a delivery of gas. Now, getting back to Marvel Mystery oil. I have used that on our previous 89 Chrysler and after about 1.5 years I had to change the throttle body/injector and the O2 sensor. Not smashing on the Marvel Mystery oil, it may have been a fluke. From what I have read about the Mystery Oil is that it is great for vehicles with carbeurators, moving linkages, etc. However when we did receive our vehicle the dealership warned us not to use any additives in the fuel, cause it could damage the injectors. What they did recommend was to use a couple of tanks full of a high octane, high detergent gas to clean the system out. Next, I have read many posts about the rotten smell/odor, sulfur burn. It had not happen to us until I went from 89 octane to 87. I used 89 for about 4 tank fulls and wanted to see the difference with the 87 octane. Well I know now, my wife was in the car and it can make a person feel to throw-up. Well, thats my two cents.
  • imidazol97imidazol97 Crossroads of America: I70 & I75Posts: 17,715
    The additives in all gasolines are supposed to be the same. If anyone has a statement from a major brand that they have a different, more effective additive package in their 91 92 93 octane I'd like to know.

    A discussion on a knowledgeable car talk program said the premium fuel burns cooler in a car designed for regular, and leaves more residue than the regular fuel. In a car designed (compression-wise?) for premium it burns hotter and doesn't leave the carbon. They mentioned the temperatures involved.

    The sulphur difference between regular and midgrade might exist. But I understand the sulphur smell is mostly from low throttle driving for a time and a buildup in the converter of the molecules; then with harder acceleration the converter is cleaned out. Therefore the smell occurs more when you start driving aggressively.

    Was there a different in driving patterns when you had midgrade vs regular?

    This message has been approved.

  • nw1997nw1997 Posts: 227

        Actually, the car is still in the break in period. We got about 1000 miles on it, to me my break in period will be around 5000 miles. Then will I punch the vehicle and drive aggressive on occasions. I drove the vehicle the same way I did with the 89 octane, smooth acceleration, avg 55 - 65 MPH, nothing change. The Sulfur smell never happened until I put a tank full of Mobil 87 octane a couple of weeks ago. I will not do that again, I will use 89 or higher octane from now on. Many companies are stating that the vehicle runs OK with 87, but to me I believe its a marketing scam for people to buy the vehicles in these high priced gas wars. For example, my dad's CRV say's 86 or higher octane recommended. When we used the 87 we got about 200-250 miles out of a tank. When we went with the Mobil 93 Octane we were getting 300-330 miles out of a tank. Same driving conditions. How could one explain that.
  • Just a point of information. Fuel injectors do have moving parts that need to be lubricated. I am not trying to sell anyone on the use of this product. But rather, I am just sharing some basic information with some "GREAT People" on this board. Four ounces of MM oil to each 10 gallons of fuel would not even be noticed. (Picture pouring four ounces of orange juice into 10 gallons of water. You would not see the orange juice in the water).---Greg
  • nw1997nw1997 Posts: 227

         Doesn't the high detergent gasolines have there own additives that would lubricate the injectors., keep them cleaned, etc? From the dealership's opinion this would make sense. What does Honda state about adding additives to the fuel system? The only feed back I got was the use of dry gas, to remove moisture from the tank. This was the only additive I was told that could be used when needed.
  • If you truly feel that way about the components of the fuel injection system, then by all means DO NOT use anything in the fuel of your vehicle. Fuel injectors are worth about $100.00 each. So if they malfunction, I will either have to have them cleaned,(if that is possible), or have them replaced. Either way that is an expensive / time consuming process. Now a quart of fuel additive (32 ounces) costs $3.00 to $4.00 dollars. At 4 ounces to 10 gallons of fuel, I can treat 80 gallons of fuel. Assuming the higher price of $4.00 dollars, the cost of this preventive maintenance per 10 gallons is 0.125 per ounce X 4 = 0.5. That is truly cheap preventive maintenance. At 4 ounces to each 10 gallons, you would not even see the product in the fuel. Anything moving needs lubrication. In the fuel system you have the electric fuel pump, the injectors, the intake and exhaust valves & valve guides and the piston rings in their grooves. No one is forcing anyone to use this product, and I am sure if you do some investigation you will find people who agree wil you and with me about this concept. So I guess it is a personal thing. In any case, I am just sharing some information from my experience and point of view. I have used this product in marine and land based engines for years, and I have never had valve or fuel related component problems. Now this might just be "luck" or it might be that products such as this really do something in the fuel. I guess the only way you will know is if you try it! ----Have a nice day. -----Greg
  • imidazol97imidazol97 Crossroads of America: I70 & I75Posts: 17,715
    Greg. Since you seem to enjoy having a dialogue about this topic, I'll take an analytical tact.

    In 120000 miles of typical driving I calculate about $272 spent on this fuel additive at the higher price you supplied.

    If I'm driving a quality built engine, the injectors probably wouldn't show wear until 50% longer than the mileage I used (180000). If the gasolines are quality products with proper additives after the BMW influence in the late 80s, they have additives to stop the olefin formation during heat soak when the engine is turned off that clogged the injectors.

    Most people are going to have traded their vehicle after 100K. The additive may work. The additive may not help avoid a problem that wouldn't happen anyhow.

    This message has been approved.

  • I enjoy having a discussion about this topic, because I see a lot of damage on marine engines because of the quality of the fuel today. A marine engine shows the wear faster, because it is always working very hard to keep the boat "on plane". (It is always going "up hill" and never is in a "cruising mode of operation"). For every 100 hours on a marine engine, that is equal to 10,000 miles on a land based engine. Marine inboard and I/O engines are suffering from valve and valve guide problems,(carbon build up), and the outboards are suffering from seized piston rings on pistons,--- both due to carbon problems related to the fuel,(not the lubricating oil). In terms of replacing fuel injectors on Honda vehicles, I would guess that the dealer does not see this service because either the customer is doing his / her own work, or they are taking this servce to a local repair shop, or a speciality shop. There are many fuel additives on the market today. If you look at a "trucker's web site" you will see that fuel additives are a major part of the trucking preventive maintenance industry. They must be using these products for a reason? ----Greg
  • imidazol97imidazol97 Crossroads of America: I70 & I75Posts: 17,715
    "...injectors wear out over time, (lack of lubrication in the fuel)."

    Can someone cite a Honda repair or Book of Honda saying injectors just plain wear and need to be replaced?
    Can someone cite a Honda repair or Book of Honda saying injects need additional lubrication that the liquid fuels don't supply today?

    "...small quantities of gum are present in gasoline..."

    Can someone document for me that these are present in the normal, fresh high volume gasoline supplied from major brands? I'd really like to see the list of "gums."
    Additives in gasoline handle the breakdown of the hydrocarbons left at the tip at shutoff in some vehicles. The decomposition of the moleculars leads to deposites at the tips. This was a problem in the 80s with BMW's injectors. And was fixed after BMW listed gasolines by brand that contained the necessary 'detergents.'

    Today, not needed. Name brands, high volume, unleaded regular if that's what your engine was designed for.

    This message has been approved.

  • No manufacturer will admit to the need for an additive in the fuel. That would destroy their sales. Remember, once the vehicle passes 3 years or 36,000 miles, the entire responsibility of maintenance is in the hands of the owner of the vehicle. If a fuel additive is not important, then why are marinas in the New York / New Jersey area selling a fuel for both gasoline and diesel boats call "ValveTech"? This fuel contains an upper cylinder fuel lubricant. The fuel is being used in outboards, (2 & 4 cycle engines), inboard engines,(4 cycle), I/O engines, (4 cycle) and they have a diesel formula.----Greg
  • imidazol97imidazol97 Crossroads of America: I70 & I75Posts: 17,715
    The thesis that auto manufacturers build to last only through warranty is contraindicated by Hyundae then. Since their warranty is 5 and 100k, they obviously would recommend additives for their engines. Anyone know that they do?

    The thesis that a Honda is built to last only through 3/36 warranty goes against most people's opinion here that Honda is an engine company and build the best engines in the world. They would cut corners on their injectors so their engines aren't long enduring? Response?

    Marine use has no relationship unless you plan to drive your car through high water a lot. Here in Ohio I try not to do that, so marine useages don't appeal to me. I hate being on a bridge over water, like the one at Washington's Crossing last summer over the Delaware!!! I always worry the bridge will fall.

    This message has been approved.

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