HIGHWAY FUEL ECONOMY OF GASOHOL AND UNLEADED GASOLINE.

Tests were conducted using two 1976 Ford Torinos in which the fuel economy using gasohol was compared with that using unleaded gasoline. Observations were made for both summer and winter driving conditions on North Dakota highways. Gasohol gave 3. 4 percent fewer kilometers per liter than the unleaded gasoline. This difference was statistically significant at the 99 percent level of confidence. The reduced fuel economy with gasohol appears to be directly proportional to the lower energy content of gasohol. Vehicle fuel economy during winter driving exhibited a slight temperature dependence while using gasohol. No temperature dependence was detected for gasoline mileage during winter driving conditions or for either fuel during summer driving conditions.