[Skyhigh]

10% ?
That would be pretty low quality Ethanol (90%).
Isn’t that what logs are for anyway? Or do you rely on the flex fuel system blindly?

I’d be much more concerned about the injectors and engine in general, than for not being able to extract the maximum power due to corrections.

Many use Bioethanol due to lack of E85 (which contains more pure Ethanol in theory… but what the reality is, only few know). If gasoline in say California is crap, what makes you think the E85 is mother’s milk?

So far I have not read any complaints from Bioethanol users, but as with everything else - one must be cautious and make sure to use quality products (and personally verify that, to the extent possible). This may even ensure higher quality blend than an unknown quality E85 pump gas.