03-26-2014, 09:52 PM
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CC Member
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Join Date: Sep 2009
Location: Camarillo,
CA
Cobra Make, Engine: SPF #2608, Roush 427SR T-W
Posts: 911
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Not Ranked
When I said ethanol has 115 octane, I meant a blend of 95% ethanol and 5% denaturant has about an 115 octane. E85 is defined as fuel with between 50% and 85% ethanol! The ethanol will give you the HP, but the energy content is lower so you get less gas mileage. 1/3 less gas mileage is typical with E85, but you still get more HP. You should not run E85 unless you have a flex-fuel vehicle. E85 requires steel fuel lines and special components to operate safely.
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