Quote:
Originally Posted by 1badtie
Typically any E10 fuel is created by blending 10% ethanol with a lower octane base fuel to reach the desired octane rating. Thus 93 Octane is typically 91 octane gasoline blended with 10% ethanol. In other words, the 10% ethanol blend is roughly a 2+ octane rise in octane rating. You are getting what the pump advertises, not some octane 2 points higher.
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You are overthinking this. E10 still cools better and provides more detonation resistance vs E0 93...It's been proven. Either way the fuel systems in these cars are designed to handle Ethanol based fuels without issues. I leave Ethanol(E40 +) in my 2016 SS with 15k miles year round. It sits all winter without being driven...no issues.