While E10 is the most common ethanol-based fuel, E85, a blend of 85% ethanol and 15% gasoline, has a higher octane rating and burns cleaner. Today many vehicles can burn E10, which has a lower ...

read this full Auto News article at Truck Trend: Research findings released today show that mid-range ethanol blends--fuel mixtures with more ethanol than E10 but less than E85--can in some cases ...