Octane Number Increase of Military Vehicles Operating on Unleaded Gasoline

The suitability of using unleaded gasoline in military and commercially designed equipment located at four Army installations has been evaluated over a two-year period. A total of 3007 vehicles were monitored during the evaluation for maintenance and performance problems. This paper presents information on vehicle octane number requirements and octane number increase trends measured on a selected group of vehicles during the evaluation period. Details of the fuels used, vehicles tested, test procedure and results are discussed.