Diesel vehicle performance on unaltered waste soybean oil blended with petroleum fuels

► We examine engine performance on unaltered waste soybean oil-petroleum fuel blends. ► Fuels containing 15%, 30%, 40% and 50% waste soybean oil were created for analysis. ► Power and torque were analyzed on three vehicles on a chassis dynamometer. ► Performance for 15%, 30% and 40% WVO blends averaged 1.1% less than pure diesel. ► Performance for the 50% WVO blend was 5.4% lower than pure diesel.