Re: E10 ethanol effects on our engines?
E10 would refer to 10% ethanol being added to 90% typical unleaded gasoline. The opposite would be E85, which is 85% Ethanol and 15% unleaded.
If you live in a Smog area, like AZ, the fine print on the pump says the 10% maybe added to your fuel without your knowledge depending on the time of year.
In Iowa, for instance, you usually have 87 octane, then 89 octane E10, for the same price, then 91 octane. Lots of Ethanol in Iowa. The "E10" designation is a new marketing/ clarification tactic, "E10" has been available as long as I can remember in IA.
I have used E10 in every vehicle, motorcycle, etc., that I've owned without issue. When it is/ was available.
Compared to pure gasoline, an alcohol based fuel like ethanol is going to be more corrosive to your fuel system, but I'm not sure what the effects are with only 10%. Ethanol also has a higher octane rating then the same volume of Gasoline, but has less BTU per gallon, so you may notice slightly lower fuel economy when using E10, and definately while burning E85- which can only be used in vehicles designed for it. I have hand calculated hundreds of tanks in a variety of vehicles and have not personally noticed a decrease in MPG while running E10- though I will point out I was not necessarily looking for one in the numbers. If there is/ was a difference, it was less then my normal tank to tank variation in MPG.
I *assume* the warning against using it in small engines is to cover their asses, due to the more corrosive and less lubricating nature of the fuel.
I personally have never had an issue, in the several hundred thousands of miles I've put on E10 powered vehicles. I have heard people say negative things about "corn gas", etc., but when pressed they never seem to have any first hand negative experience with it.
68 Nova (under construction)
07 Silverado Classic 5.3/ 4L60e/ 3.23 posi
80 K20, 96 HD Superglide, built.