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Synthetic motor oil

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Comments

  • armtdmarmtdm Member Posts: 2,057
    Pure Ones have more pleats and the drain back valves and overall construition are of a higher quality. Mobil 1, Amsoil/Hasitngs and Pure Ones are by far the best filters out there.

    RedLine cannot be purchased at most auto parts stores. Go online to find the dealers and expect to pay $7/quart plus shipping. Very very expensive
  • brorjacebrorjace Member Posts: 588
    Luphy, I'm not sure if there is an VI in Mobil 1 5W30. If there is any, it is just a small amount.


    Wix is one of my favorite brands of filters. NAPA Gold is the same thing (both made by the Guard Corporation in Gastonia, SC. The canister is built like a vault and all the other components (springs, etc ...) are high quality. I'm not crazy about the amount of filtration area in the #1334 that fits most Hondas so for that partiular application, I use OEM filters only.


    Hondaperf, Try www.manhonda.com. They carry some of the generally more useful Redline products and you can buy OEM Honda (Filtech) filters from them

    for as little as $4 each. You should try to use OEM filters in your Honda:


    http://www.tech2tech.net/library/oilfiltr.htm


    --- Bror Jace

  • lovlov Member Posts: 11
    I know this forum is titled syn motor oil, but I thought the subject of tranny oil was close.
    I live in Manitoba, Canada where winter temps get cold(-54 F. is my area all time record low).
    I noticed with my new GM car that even with the engine at near normal operating temps the tach will indicate 2500 rpm for a few miles before it finally drops to 2000 rpm at 65 mph.
    This tranny is filled with GM's long life extended drain tranny fluid.
    Would syn tranny oil mix properly if I don't flush the tranny and only change what drops out of the pan and would I see a big difference in operating characteristics, especially in cold weather.

    Most of the posters here have mentioned fuel savings with syn motor oil, but would not there be more money to be saved with less friction in tranny parts and only requiring a few quarts of oil every 25,ooo-50000 miles.

    By the way I have 5w-30 Mobil 1 in the engine so I don't think it is because of stiff engine oil that I run at a 500 rpm excess for the first few miles.

    Maybe my thinking is wrong but I believe your engine will be reasonably warm before the thermostat allows warm coolant flow to the rad which will in turn warm cold tranny oil.
  • brucer2brucer2 Member Posts: 157
    I don't know the specifics of your GM car, but I know on my Nissans the transmission won't shift into OD until the engine is at full opperating temp. This could be the reason why the RPMs are high for the first few miles (it is with mine).
    According to the Mobil site, you can mix their synthetic fluid with regular fluid. I, personally, would do a complete refill.
  • alcanalcan Member Posts: 2,550
    When the torque converter's unlocked it's slipping and generating heat. It actually helps warm the engine coolant since the trans cooler is in a rad tank. Tthe powertrain control module is looking at inputs from various sensors including coolant temp and transaxle oil temp. It will allow a 3-4 shift but won't allow lockup unless all sensor inputs are within specified parameters, including coolant and trans oil temp. A common cause of no or delayed tcc operation on GM cars is a thermostat stuck open, not allowing the engine to reach full operating temp.
  • armtdmarmtdm Member Posts: 2,057
    And you can easily mix the two fluids. I have done so for years. Both Amsoil and redfLine make a fluid compatible with Dexron III It will improve the cold weather shifting and it is longert lasting then the factory fill as well.
  • adc100adc100 Member Posts: 1,521
    For years I have always added the syn when dropping the transmission pan. I have noticed a drop in engine coolant temperature also for 2 of my vehicles when I added the Mobil 1 ATF. I believe it has improved vehicle economy also.

    Al
  • lovlov Member Posts: 11
    Brucer2-- Even when my vehicle engine is at operating temp according to gauge I usually can go a few miles before rpm drops-- of course I am talking driving car at 50-60 mph at -20 F.--which would create a windchill of -60 F.?

    alcan-- thermostat is working properly as engine warms up reasonably fast and stays there according to guage. You mention torque converter warming up rad by the process of friction.
    In the scenario of car warming up a few minutes after a -25F. startup and then driving away, there would be very little friction until you started to drive away. After the first mile engine is normal but I would think torque converter is not and actually rad is just stealing heat away from the tranny as engine coolant will just start flowing after first mile and then with this real cold blast never probably warms rad to a normal level. I would suspect that the fans pulling air through rad never come on while driving at highway speeds.

    armtdm-- you mention two kinds of syn tranny oil, but have never seen them available locally, but have seen Mobil 1 at walmart etc. Don't want to start oil war but how does it stack up to others and have you or others ever seen any testing as to the benefits of syn compared to dino oil in trannys cold weather or otherwise. Have heard of a lot of tests done on engines but not trannies.

    adc100-- I guess the thing people have to wrap their minds around when it comes to tranny fluid is the idea that the torque converter uses the friction of the oil to drive the car, but syn oil reduces friction so therefore it won't drive the car properly--but probably this is where fluid strength etc. comes into play and also with converter lockup which most of the newer vehicles incorporate fluid drive is cut out?
  • armtdmarmtdm Member Posts: 2,057
    Like synthetic oil I have yet to see true independent lab tests. My own experience, well at first opportunity I switch them over to synthetic fluids but as they are drain and fills I only get about half at a time. On my 130,000 mile Toyota I have done this every 30,000 since new, first drain at 25,000 actually. The fuilds are formulated for the automatic trannies so the friction issue is solved somehow, I honestly do not know how.

    New Buick under severe conditions the tranny fluid recommendation is 50,000, 100,000 if normal conditions. Could even be a synthetic from the factory?????
  • brucer2brucer2 Member Posts: 157
    I also experience driving for several miles, with the temp guage indicating that the engine is warm, but it still takes longer for OD to engage. I'm not sure what set of sensors determine whe OD is appropriate, but it's more than the just the water temp.
    I'm sure the synthetic tranny fluids have the right properties for the transmission to operate the same as it does with conventional oils. The differences are that the synthetics will operate, and not degrade, over a larger operating temperature range. They are supposedly also better at carrying heat away from the internal components.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    No, I don't think they have any better heat conductivity, unless you mean in conjunction with an oil cooler on the transmission. Oil is a lousy coolant if it is not exposed to an outside source of cool air and if it is not circulating in an air stream.
  • brorjacebrorjace Member Posts: 588
    "Oil is a lousy coolant if it is not exposed to an outside source of cool air and if it is not circulating in an air stream."

    I remember seeing an oil pan that had a series of air tubes/passages running through it. It was supposed to allow air passing beneath the car to cool the auto tranny fluid. I wonder if it worked enough to justify buying it?

    --- Bror Jace

    PS - I have virtually no experience at all with auto-trannies. <:^(
  • stevejjjjjstevejjjjj Member Posts: 31
    .....oil for $2.99 a quart. Anyone used this yet? Who makes it for them anyways? Any comments?
  • div2div2 Member Posts: 2,580
    With my BMW CCA discount I get it for $2.88/qt. I even put it in my '93 Pathfinder. I figure if it's good enough for a 750il it's good enough for anything I drive...
  • alcanalcan Member Posts: 2,550
    Nope, it isn't friction that makes a converter operate, it's fluid impact. The impeller "throws" fluid at the turbine blades, and the impact forces the turbine and trans input shaft into rotation (hydrodynamic drive). It also converts some of the dynamic fluid energy to heat. Not unusual for converter out temp to exceed 400 F under heavy load, which is why converter out is always routed directly to the cooler.
  • steve234steve234 Member Posts: 460
    An automatic is a high tech oil pump. Any oil formulated for transmission use will have the properties needed to work properly. However, there are many different formulas of transmission oil. Dexron for GM will not work in many other transmissions. It is important that you get an oil that is marked as a replacement for the particular oil required. Probably, the big advantage of synthetic transmission oil is the ability to endure higher heat. While I would be skeptical of any significant improvement with synthetic, I am going to try it at my scheduled trans. oil change to see what effect it has.
  • dspangenbergdspangenberg Member Posts: 8
    I have a new 2001 Suburban LT with the new 8.1 engine - only 750 miles. I want to do an oil change right now, or at least before 1000 miles and my overall intent is to use synthetic oil - probably Amsoil or Mobil 1.

    My question is should I change to synthetic now? I know I should probably change the oil again at about 3000 miles after it is most or all of the way broke in. Should I just not worry about synthetic now and start it at the 3000 mile change or should I go ahead and put synthetic now in and only do a filter change at 3000 miles?

    I realize that it is OK to do the breakin with synthetic oil, but don't want to throw money away if at 3000 miles I should do a full chnage rather than just the filter.

    Any Ideas?

    Thanks
    Dan
  • armtdmarmtdm Member Posts: 2,057
    I have switched several cars at the 1,000 mile mark to synthetic. I would suggest going to 5,000 for the next one and then at least 7,500 after that. My oil analysis has never shown excessive wear metals or "breaking in" wear after the initial 1000 or so. The silicon seals used in most new cars tend to put silicon (which oil analysis thinks is dirt) into the oil for about the first 20,000 miles but this silicon is non harmful and will not damage an engine. Many people on this board will suggest 3,000 miles before switching which, if you are going to change again in 3,000 miles, using a dino at 1,000 may be the way to go for you and switch at the 4,000 mile mark.. .
  • brucer2brucer2 Member Posts: 157
    From the article at: http://mr2.com/TEXT/synth_oil.txt


    "The remarkable ability of synthetic oils to reduce internal operating
    temperatures is far too important to ignore, since high operating
    temperatures contribute directly to premature failure of mechanical
    components and gaskets and seals. Coolant (i.e. water/antifreeze) cools
    only the upper regions of an engine. The task of cooling the crankshaft,
    main and connecting rod bearings, the timing gear and chain, the
    camshaft and its bearings, and numerous other components must borne
    entirely by the oil. There are three identifiable reasons why
    synthetics do a better job of cooling an engine: (1) Because of both the
    oil's lubricity (slipperiness) and it's stable viscosity, less
    friction-- and thus less heat-- is generated in the first place; (2) The
    molecular structure of the oil itself is designed to more efficiently
    transfer heat, even compared against the thermal conductivity properties
    (ability to absorb and dissipate heat) of an identical-viscosity
    petroleum oil; and (3) As mentioned in the preceding paragraph, the more
    rapid oil flow of these lower-viscosity synthetics contributes
    significantly to the efficient transfer and dissipation of heat.
    *Because of all these factors, oil-temperature decreases of from 20F to
    50F are quite common with the use of synthetic oil*. One might even say
    that the heat-reduction properties of synthetics are synergistic...by
    helping to reduce its own temperature, the synthetic oil is
    simultaneously enhancing the lubricant's overall performance
    characteristics."

  • agt_cooperagt_cooper Member Posts: 202
    SO?

    If I write a technical-sounding article and put it out on a web site somewhere, will you believe everything I've written?

    No matter what anyone here says, there is still no irrefutable evidence that using a synthetic oil vs. a conventional oil will have any effect whatsoever on engine longetivity, efficiency, cleanliness, etc. etc. etc.

    What you have here is a bunch of folks who believe in a product trying to turn there perceived experiences into hard proof that product A is better than product B.

    One of my favorite claims is the one about fuel efficiency. There have been posts that swear that by simply changing to a synthetic oil, the subject vehicle's fuel economy jumped by 1-2 miles per gallon. Now, if this were true, don't you think auto manufacturers would have jumped at the chance to improve their CAFE numbers at a very minimal cost? Don't you think large trucking companies, who do everything they can to maximize efficiency, would be using synthetic oils in their fleets?

    The fact is, neither manufacturers nor fleet operators have made a change because there is no payoff!!!
  • armtdmarmtdm Member Posts: 2,057
    Well, as noted a zillion times on this forum, there ain't any independent lab test on synthetics. So, all we have is anecdotal experiences.You have made you decision to use dino and others have made theirs. We need to move on

    By the way,. my Amsoil jobber sells to many fleets who, with big diesel rigs, also use the bypass filters for unlimited oil life. And, although I cannot prove this (although the Mobil 1 experience {when they came out with a 25,000 mile claim and then just stopped advertising it} leads me to believe I am correct) that big oil and auto manufacturers are in cahoots. To put synthetics in all engines would be counter productive to manufacturers and big oil! Sell fewer cars in the long run and sell less oil. Yea. paranoid perhaps and not worth arguing about either. Of course, Europe has twice the oil change intervals as the US on the same engines, wonder why?
  • brucer2brucer2 Member Posts: 157
    GM and BMW are shipping some model cars with synthetic oil. I would suggest doing some research prior to posting nonsense.
  • agt_cooperagt_cooper Member Posts: 202
    but you know what happens when you assume....

    I have, in fact, been using Mobil 1 in my car for the past 46,000 miles. Purely an experiment, and as I've said here before, I'm pretty sure I'm wasting my money!!!

    And brucer2, to whom is your post directed?
  • bblahabblaha Member Posts: 329
    "Coolant (i.e. water/antifreeze) cools only the upper regions of an engine."

    Well duh! That is where the combustion process is taking place.

    I don't doubt that synthetics hold up at least as well as dino under higher temperatures, but that's a far cry from saying it "cools" the engine.

    "Cooling" means a continuous removal of heat. Now, maybe the airflow across the oil pan underneath does remove some heat, but if oil were meant to cool an engine, engineers would have built fins into it (the pan).

    Water does a better job of cooling an engine than air, because it can hold more heat. But a water cooled engine without a radiator overheats, while an aircooled one with a fan blowing doesn't.

    The heat has to be vented to the environment somehow for it be considered "cooling". Nothing about a vehicle's design suggest the oil contributes much towards engine cooling. Therefore, any difference you might see between synthetic and dino oil will be tiny.

    The 20 to 50 degree temperature difference is interesting. I currently have synthetic in my vehicle. I'll change it to dino this weekend and measure its temperature while I do so. I'll change the dino back to synth in another few weeks and see how much of a difference there is.
  • lokkilokki Member Posts: 1,200
    I would have thought that the heat of combustion was far more significant than friction in regards to engine temps.

    I'm still a little skeptical, frankly, but skeptical as opposed to disbelieving. Can you find any other sources to support this? I'd think that synthetic makers might make this claim in their advertising....

    Additionally, I think it's a bit of a leap of faith to say that a decrease of 20 degrees would lead to increased engine or component life.

    Still.... If you can find some more support for it
    (I've never heard of Curt Scott, and therefore don't know his credentials to make these claims)
    You might be able to sell me the idea.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    If you want to test synthetic's superior cooling properties, take the radiator out of your car and drive around for a few days. Let us know.
  • brorjacebrorjace Member Posts: 588
    dspangenberg, I'd wait on switching to synthetic ... especially if you were told your vehicle was equipped from the factory with a special 'break-in' oil that needs to be left in for a certain length of time. Fords, Hondas and probably many others are doing this. Also, I personaly wait until 10,000 miles have passed before using synthetic just to be extra careful. >;^)

    agt_cooper, you said:
    "there is still no irrefutable evidence that using a synthetic oil vs. a conventional oil will have any effect whatsoever on engine longetivity, efficiency, cleanliness, etc ..."

    Ah, you are asking for a SERIOUS standard. Few things are 100% irrefutable. For most of us, SAE tests and plenty of anectdotal evidence is enough to justify the paltry amount of additional money the use of synthetic oil costs.

    If you think you're wasting an additional $20-30 per year on your vehicle, that's your opinion. Even so, it's a small amount of money when compared to the annual cost of owning and operating a vehicle, which can easily top $2-3,000 per year.

    --- Bror Jace
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    I'll put my vote in that using synthetic is never a "waste" of money....my only concern is that it might not meet some folks very earnest but very optimistic expectations. It's like they put in it and wait for something miraculous to happen. I don't think it works like that, nor does much of anything out of a can.
  • agt_cooperagt_cooper Member Posts: 202
    Oil plays a critical role in the cooling process of any internal combustion engine. While oil itself is not always cooled by an active process (i.e., running it through a radiator), it does carry a significant amount of heat away from areas where heat is generated to an area where that heat can be conducted into the environment. And some manufacturers do have cooling fins on their oil pans!!

    The only reduction in oil temperature would come from a reduction in the heat produced by friction, and I too doubt that the extra slipperiness of synthetics will significantly reduce the temperature of oil circulating in an engine.

    It is also important to remember that oil can be cooled too much. Remember, oil reaches its rated viscosity at greater than ambient temperature!!
  • brucer2brucer2 Member Posts: 157
    One of the hottest parts of an engine is the piston crown, and the hottest bearing is the small end bearing in the connecting rod. The only hotter moving part is the exhaust valve. The water jacket, on liquid coled engines, is far removed from either of these parts. The piston crown is cooled by conduction through the skirt and then into the cylinder wall, and by oil. A number of engines direct a stream of oil to the underside of the piston for this very reason. There is a great enough temperature differential between the oil in the piston area and the sump for great quantities of heat to be transfered from one area to another. (Exhaust valves are cooled by conduction to the head via their seat, when seated, and valve stem.)
    Many so called "air cooled" 4 cylinder motorcycle engines are actually liquid cooled by their oil: by design.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Yes but a motorcycle engine is sitting right out there in the air stream, and they are both alloyed and finned as well.

    Of course oil transfers SOME heat but no oil can take over the job of circulating water. Like I said, disconnect the water pump on your car and see how long your oil AND water last on the freeway. (don't really do this---just a hypothetical suggestion!)
  • bblahabblaha Member Posts: 329
    But how much? If you could put a vehicle in a giant calorimeter, measure how much energy was being put into the environment, and then back out what came from where (tailpipe, radiator, oil, etc) what percent would be attributed to the oil? I don't think (I'm just guessing) very much would be attributed to the oil. I think most of it comes from the tailpipe and the radiator. Therefore any difference between synthetic and dino oil would have a small effect.

    Does anyone have numbers for conductivity, specific heat and density for both a synthetic and dino oil?
  • billyedbillyed Member Posts: 1
    ok.,all these theories about the value of synthetics are fine. How about some real world experience. I've torn down several engines using both types of oil. One in particular stands out. It was a mustang GT 5.0l run on Mobil 1.This car was rode hard and put up wet. At 100k it was torn down for performance mods.The cam when miked showed very little wear.The bore was still in good shape and you could eat off the engine it was so clean.I cant say this for engines I've seen run on dino oil.If you go to the Automotive engine remanufacturers association website they specificly state not to run synthetic oil during engine break in as the rings will not seat properly.Why?Because synthetic oil has better lubricating properties than dino oil.Bottom line.If you will get rid of your vehicle in 4 years use dino oil and dont worry.If you plan on keeping it use synthetic oil.
  • armtdmarmtdm Member Posts: 2,057
    We have coolant that will go 5 years/150,000 miles, transmission fluid that has 50,000 mile severe service and 100,000 mile normal service intervals but engine oil is still at the 3,000-5,000 range even though the products/technology exists. Why is that? Well, if the owner does not change the coolant and tranny fluid, which the ave driver probably does not, in most cases nothing happens and if you unload the car in under 100,000 miles most people will never see a problem.
    However, with engine oil it has to be changed, whether it be dino or synthetic, in most cases at least once a eyar. So, the manufacturers may be fearful that since most people do no maintenance if they went with synthetic and recommeded 7,500-15,000 mile changes the oil would never get changed and the engines would be ruined in 30,000 miles and warranty issues would abound. Part of the reason some cars now have oil change interval lights.
    My theory! Also,having purchased a new car this month it amazes me that the salespeople spend no time on maintenance. This may be selfish reasons, come back sooner, but they really should go over in detail the maintenance requirements if each car they sell and assure that the owner understands why. Perhaps as a manufacturer I would get every new owner to sign a release that states they have been advised and understand the maintenance requirements of the car
  • bw403bw403 Member Posts: 7
    I have been using Mobil 1 for more than 30 years now. I have been changing oil at 1 year or more and at up to 30,000 miles between changes. I have never had a single problem doing this on several cars including a 1990 Corolla that had 197,000+ miles on it when I replaced it. I have also been doing this with my '92 SC400 that currently has over 120,000 on it.
    The oil is expensive but well worth it. I have never been able to understand why people continue to believe that it is still necessary to change oil at 3,000 mile intervals with a good synthetic oil. I've heard about contaminates in the oil and all the other standard arguments, but my experiences over all these years has proven that these arguments aren't accurate. I have been told by more than one dealer what great condition my cars are in considering the mileage I've put on them when I do go in for a service check, which I won't do before 100,000 miles these days. If there are problems, they have never been engine problems.
    I realize I won't change the minds of those that simply can't accept this concept, but I thought I'd relate my experience anyway for anyone that has an open mind on the subject.
  • brorjacebrorjace Member Posts: 588
    billyed, I agree with your philosophy overall. What you expressed is called "anectdotal evidence" and because I have comparable experiences, that's reason enough for me to use synthetic oil and recommend that others I know do the same.

    I have a boss who just leased a Nissan Maxima. He gets the oil and filter changed at the dealership for "free" as part of the 3-year lease agreement. He asked me if it was worth switching to synthetic oil and I asked him if he was going to buy the car after the lease was up. When he said no way, so I told him not to spend the extra money on synthetic. But he's the exceptiob to the rule.

    armtdm, I still think the car companies are afraid to recommend synthetics for two possible reasons:

    1) They want the repeat service business for the dealerships. If you get people in the habit of going to the dealership on a regular basis for simple things such as oil changes and inspectons, they will be more likely to go to them for pricier services, replacements and rebuilds.

    2) They are afraid people will think of their cars as hard/expensive to maintain ... but on the other hand, manufacturers are putting out more cars these days that require premium fuel and people are still buying them, so that makes this 2nd theory less likely to be the reason.

    --- Bror Jace
  • brucer2brucer2 Member Posts: 157
    How much cooling efect is derived from the engine's oil is a side issue. What is relevant to this discussion is which, if any, type of oil is better in this regard. It appears, from the research that I've done, is that synthetic oil is better.

    BTW, I've had catastrophic coolant failures, and have empirically determined that you can limp pretty far, without damaging the engine, without coolant.
  • agt_cooperagt_cooper Member Posts: 202
    Okay, you've done "research"....where can we see the documentation on it?
  • brillmtbbrillmtb Member Posts: 543
    I cant go back and read all the posts but can you help me with a few questions?

    Are there any objective studies showing synthetics superior to standard oil?

    Someone reported premature hydrolic valve failure on the Montero site "due to" the use of synthetic oil. Is this a known problem seen with this type of valve that depends on oil pumping them up and why would this occur with synthetics only?

    Thanks
  • brillmtbbrillmtb Member Posts: 543
    By the way, I dont think water cools better than air because it "holds more heat". I believe it does a better job because a water interface conducts heat about 25x faster/more efficient or something like that over that of a solid/air interface.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    The only real world study I ever looked at showed that synthetic wasn't any better than regular oil. Here's a summary of the test done on NY taxicabs and the results:

    http://www.triumphspitfire.com/Oiltest.html

    As for tearing down engines, unless you measured the wear, and b) measured the wear of an equivalent engine run in an equivalent way with regular oil, nothing is proved at all, is it?

    My buddy and I just tore down an MGB engine that never saw a drop of synthetic for over 100,000 miles and it looks fantastic--original hatching, etc......but when using the micrometer and feeler gauges we found some wear in cam bearings, valve guides...about what you'd expectd for a well-cared for engine.

    If you say an engine has "no wear" at 100K, you are talking about a perpetual motion machine, sounds like.

    This is not to say that synthetic doesn't perform very well, and it certainly seems to extend the "lubrication range".

    The point is----your engine doesn't seem to care.
  • bblahabblaha Member Posts: 329
    Shifty:
    consumer reports? What do those jerks know?

    brillmtb:
    The reason water cools faster is because it takes a significantly greater amount of heat to raise its temperature (it holds more heat - the volumetric heat capacity of water is like 3000 times higher than air). Heat transfer is driven by thermal gradients, so because it takes more energy to heat water, the water stays cooler and heat transfers "faster".
  • wilcoxwilcox Member Posts: 582
    What's so special about new car factory oil? What makes it's formulation different from the rest? Was it blessed by the Senior Engineer?
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Beats me...I always wanted to know that myself. Is there really such a thing or is this one of those INternet rumors? Anyway, seems like the thing to do is dump it early on and get your preference in there.
  • brillmtbbrillmtb Member Posts: 543
    Yes, but....with a closed system (radiator) with a fixed amount of water you have limits based on the amount of water. Although air/solid interfaces transfer heat less efficiently you have a virtually unlimited air supply flowing past the radiator.

    Water does not cool FASTER because it holds more heat energy, it cools FASTER because the solid/fluid interface is better able to transfer the thermal energy.

    I think I am distinguishing between efficiency and speed of cooling. We both know water cools better overall.
  • brillmtbbrillmtb Member Posts: 543
    I still would like to know if anyone has heard about lifers wearing faster with synthetic and why that would be.
  • vadpvadp Member Posts: 1,025
    Consumer Reports "STUDY" ???????
    LOL!!! image
  • agt_cooperagt_cooper Member Posts: 202
    but at least the Consumer Reports staff at least attempted an objective analysis. More than I can say for most of the comments seen here!!!
  • vadpvadp Member Posts: 1,025
    "Objective analysis?"
    It seems the people who designed that test had no understanding whatsoever about the real life conditions most cars operate in.
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