I have a 2007 NA and changed the engine oil, transmission and LSD with GM equivlant Royal Purple. I would say on average my engine temps have dropped 4º to 6º and my transmission shifts smoother. The only change is the fluids. Do you have any other plausible explantion? Here is a link that goes to a test that has the same results. Royal Purple Video Player
The engine obviously runs warmer than the cooling system states. Are you suggesting your oil change somehow reduced the amount of radiant combustion heat absorbed by your engine? Or is it instead that the oil reduces friction so dramatically that it decreased your temperature by 4 degrees?
My thermodynamics disagrees with your conclusion.
All oils work the same if they pass the grade spec. Different oils will last different amounts of time before degrading, nothing else.
I think he's trying to say that the different oil helped extract more heat from the engine, not that it reduced the amount of head transfered to the oil or by decreasing friction.
My question is surrounding lower temps, is that always better? Probably not.
__________________ 2007 Deep GXP - M5, Loaded w/o OnStar
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how can I explain that as the only thing changed is the oil?
The weather, your foot, aging, cleaning of airways, more oil, less oil, how long a list of missed items would you like?
The engine is hotter than the oil and coolant. Energy only transfers from hot to cold. If the coolant (where your temp is measured) is reading lower, it actually means less energy is transfering into the coolant. By your statements, less energy is transferring to the coolant and the engine is running hotter, but the cooling system is running lower. Unless there is less combustion that before or a frictional loss that amounts to 5-10% of the energy, oil cannot make the engine run cooler.
I can change my transmission fluid to olive oil and it will shift smoother the first couple times. You can't just make a change, then use nonobjective or scientific conclusions to determine that the cause is something you paid extra money for. You concluded these things would happen before you changed it, and now you're convincing yourself why. Change your oil, use synthetic (a real synthetic, not synthetic blend), and don't waste your money, please.
I've worked in oil/lubricants research, don't trick yourself.
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2007 Solstice GXP - No tampering before the warranty expires!
3 HP and 5 ft lb of torq and you're sold eh? That's 1 %, well within the range of error on a dyno. You couldn't make two pulls on a dyno back to back and get numbers any closer (ok, you could, but if you made 10, this would be within the span of the results).
Amazing though, that royal purple would pay for adds in a magazine and get to publish a story concluding so in their magazine. Are you seriously that naive?
National laboratory, cutting edge research, multiple publications in peer reviewed journals without advertising dollars. Oil that meets grade is oil. Lifetime is the only thing that will be effected by oil type.
There's an ad linked on the bottom of the page. They claim they know the secret big oil doesn't want you to know! I'm sure they have some nice graphs too, quick go buy it! Run your car on water!
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2007 Solstice GXP - No tampering before the warranty expires!
Not naive, just keenly aware of my cars performance. Drive car for 10,000 miles (Mobile 1), coolant temperature consistently measures 190º. Change fluids in engine, differential and manual transmission and temperature drops 4 to 6 degrees. Miles per gallon increased 2 to 3 MPG at the same time. Temperatures stay that way after oil changes and coolant changes. The empirical evidence strongly suggest the change to Royal Purple is why the coolant temperatures dropped and MPG increased.
Play games with the whatever you like, I'm not going to sit here and debate "real life experience." Boutique oils don't have refineries or chemical plants; where do you think they buy base stock from?
I've run FT-IR spectroscopy tests on almost everything. Bearing wear tests, gravity, viscosity, GC-FID, GC-MS, acid number, ICP, I'm not even sure where to stop. They charge a premium because they spend money marketing, and it obviously works. If you are convinced, go for it, it's your money, have fun. You don't have to believe in evolution either, live your own life. I'm not going to split hairs and debate unverifiable data with the overwhelming mountain of evidence that is modern science.
I've learned it's silly because no matter how much proof and science there is, there will always be Kansas. Have a good one, enjoy your Solstice
No hard feelings either; we just come from different worlds.
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2007 Solstice GXP - No tampering before the warranty expires!
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