The Super Mileage Competition is an annual event sponsored by the Western Michigan Section of the Society of Automotive Engineers, the Eaton Corporation and the Briggs and Stratton Corporation. The purpose of this competition is to give engineering students “hands on” experience with the design and manufacture of a competitive vehicle and to increase public awareness of fuel efficient vehicles. This paper describes the engine modifications, testing procedure and results of these modifications made to the super mileage vehicle entered by Michigan Technological University in the 1982 Super Mileage Competition. These modifications resulted in greater than a twenty-five percent increase in specific fuel consumption over the stock engine. With this modified engine, the completed vehicle achieved over 440 miles per gallon in the final competition.