There is an SAE article on the effects of ethanol on engine wear.
The Effects of Alcohol Fuels and Fully Formulated Lubricants on Engine Wear
Essentially, ethanol does not increase engine wear but methanol, which isn't really used, does have a negative impact. I know people with over 300K miles on their engines and use 10% ethanol fuel. My own experience with 10% ethanol fuel only goes to 165K miles with no observable engine wear as determined by no noticeable oil consumption or decrease in mileage. Be that as it may, I would follow your owner's manual with regard to which fuel is recommended. For E15, you want to look for "Flex fuel" designation for your car otherwise I would stick with E10, despite what the EPA thinks (who didn't design and manufacture your car). The easiest way to impact engine wear is to change your oil at the manufacturer recommended interval, as well as perform other recommended maintenance.
Quote:
Originally Posted by OhioBuckeye
I worked for Fo. Mo. Co. for 38 yrs. & I’m telling you Ethanol wear out your engine. I worked in the Dyno Lab & when tore down the engines that had Ethanol, it was totally burnt brown. We always used High test gas, every once in a while we ran regular gas when we got behind or used in special application engine like in process engines. Personally I think the govt. will start using more & more ethanol & car & trucks will wear out quicker! So the ones here that are making comments here about Ethanol know engines. It’s something we have to put up with. Most people don’t know the difference. It’s a terrible additive!
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