Join Date: Dec 2010
Location: The Great Big Box
Our engines weren't really designed to run on E85, it's a higher octane fuel as well (103). Flex fuel vehicles often average LOWER fuel economy on E85 than they do on gasoline (very likely because the engines were converted to run on E85, rather than desgined to).
If you utilize an engine designed for E85 (you would need a higher compression ratio, something like 14:1) then you would absolutely see the benefits.
All about that unibody life.