Are ethanol based fuels hotter or colder burning than non-ethanol fuel?
0W20 for good protection?
- Thread starter CarfriendXX
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Why?
https://extension.psu.edu/fuel-ethanol-hero-or-villain
In Mexico the Pemex Magna Sin is 5% ethanol and the Mazda Miata requires 5w-30 weight oil there. But honestly I do not know why that viscosity requirement if it is fuel, dust, ambient temperature, or engine computer requirements.
10% ethanol fuels are 97% power compared to non-ethanol.
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I guess I’m still confused as to how that relates to hotter or colder flame temperatures. As for the Mexican reasoning (doubt it’s a requirement based on the fuel) you’d have to ask them.
The big heat exchanger on the pistons is the oil jets.
Curious question… Could the car computer know where you are in the world?
The same people who say, when it comes to oil weight/grade always follow your owner's manual recommendations.
Will also say, when it comes to oil change intervals, disregard your owner's manual recommendations.
Will also say, when it comes to oil change intervals, disregard your owner's manual recommendations.
Lol wut? Even if it did, how would that matter?
I would think where you are would determine what oil viscosity they would recommend to use. Since that variable is stated what oil to use there. Piston cooling, valve timing with hydraulic, exc… Around the world specific oil is recommended which is different at various world locations. And the answer on the internet “experts” are it is ok to use any viscosity recommended anywhere that can be used somewhere else. For the kind of money paid for a modern car it would not be too hard to imagine that car knows where you are.
Anything is possible. My cars computer knows the temperature, whether it’s raining or snowing, going uphill or downhill or around a corner, and a bunch of other stuff.
When it was 105°F out and I was running 0W-20 I didn’t get a warning message.
When it was 105°F out and I was running 0W-20 I didn’t get a warning message.
A good point. Cooling is well controlled on most modern vehicles, thereby keeping the oil in it's intended viscosity range.
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Oiltemperature Never over 110C. Mostly 85-95 C.
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If you have an oil pump that is viscosity-dependent, then you can get problems with much higher hths and viscosity. In addition, high oil pressure is not always good, the question is how it comes about. In my opinion, up to 120C is not a problem for good synthetic engine oils. Viscosity is by no means everything, if 6mm2 is sufficient and so much molybdenum is present, then the lubricating film is "safe" at the respective temperature.
Ethanol fuels ... something else pushed for other reasons (just like thinner and thinner oils) besides for real reasons related to the needs of an engine.
Not all engines have oil jets.
Oooh now that’s some deep-state thinking there. Not much to do with physics but you’ve got it going on.
Only when big brother gets fully finalized.
Mexico has no CAFE and is a hot climate ... therefore, engine designers aren't under the thumb of CAFE, and therefore specify the oil that makes more sense in that climate. Same goes with same engines used in other countries ... they specify an oil viscosity based on the ambient temperatures seen, not one xW-20 thin oil to meet CAFE.
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