In MO, oil companys are forced to blend ethanol with gasoline whin economics dictate. Gasoline contains 125,000 BTU/gal. 100% ethanol is 84,000 BTU/gal. Therefore, a 90/10 mix of gas/ethanol is 120,900 BTU/gal. Thats a 4% decrease in energy per unit volume. All the places I get gas say it...