Research has been conducted that shows mid-range ethanol blends [fuel mixtures with more ethanol than E-10* but not necessarily as high as E-85] can provide better fuel economy and performance than regular unleaded gasoline even in standard, non-flex-fuel vehicles. It is generally suggested that the "Optimal Blend Level" of ethanol and gasoline lies somewhere between E-20 and E-30, and here at Badger State Ethanol we believe it to be E-25.
Optimal Ethanol Blend-Level Investigation
*E-10 (with 10% ethanol blended into gasoline) is the typical ethanol mixture found at pumps today.