Abstract
Vegetable oil fuels can be considered a renewable energy resource. Waste vegetable oildiesel fuel blends canrecycle used frying oil, which is essentially a waste product. The objective of this work was to determine the feasibility ofrunning a 10% waste vegetable oil90% diesel fuel blend during a 500h period in a 3cylinder directinjection, 2500 cm 3Diter diesel engine. Periodically, several tests were carried out to evaluate the performance and implications of such anapproach. The longterm performance of this fuel was monitored by measuring the viscosity of the lubricating oil, abnormalfunctioning of the engine, power loss, and excessive smoke output compared to straight diesel fuel. The results revealed anapproximately 12% power loss, slight fuel consumption increase, and normal smoke emissions. Combustion efficiencydropped slightly during the testing period. It can be concluded from this field study that the Diter diesel engine, without anymodifications, ran successfully on a blend of 10% waste oil90% diesel fuel without externally apparent damage to the engineparts. Nevertheless, it appears that the longterm use of waste oil blended with diesel fuel may need further testing beforeuse as a viable energy solution.
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