Burris Hi-Rev blend. Hi-Rev is a technologically advanced 2-cycle lubricant incorporating the very latest chemistry and engineering available. Hi-Rev uses special clean burning petroleum based oils, a special castor fraction that blends with the petroleum oil and imparts outstanding anti-scuff properties and high temperature lubrication, synthetic compounds to reduce gum and carbon formation and a high technology dispersant, friction modifier and rust/corrosion inhibitor. Hi-Rev will provide your racing 2-cycle engine with the most protection available from any petroleum/synthetic oil on the market while holding combustion chamber deposits and ring sticking to an absolute minimum. Hi-Rev Blend also makes a great TOP end lube for 4-cycle engines that run on "GAS"