We can all be teachers.... in General E85 Discussions Posted March 10, 2011 · Report reply All things are not equal, in my opinion, 555 mileage in the range. You can improve mileage many low cost ways of which the sum total often surpasses the ethanol penalty. Also, long record keeping required and one still needs to distill the data i.e. fuel filter, season, tire pressure, age of car, driving habits, drivers, and accuracy. Funny story my brother found long ago, wondered upon discovery of a difference in driving to northern Wisconsin from Milwaukee. After years of noting wind direction and the rest....found it to be the gradual change in elevation. Guess his Falcon 6 cylinder carb had such personality. At that time he recently bought a after market product for freeway driving. You pulled a knob, much like an old choke, to set the speed. Of course pushing it in when not needed. Worked good and cost little. Don't remember any panic attacks media hyperbole demands for central control. No news of horrid accidents quickly blaming the device. Car engines have a huge discrepancy upon efficient use of ethanol and not always the ones that one would think obvious. This fuel has a long way to go upon automotive technology to be optimized for mpg concerns. Most of it the chicken and egg syndrome.