SEF Small Engine Fuel (Case of 8)50: 1 VP SEF 2 cycle blends use the highest quality, cleanest burning synthetic oil on the market. It virtually smoke free and substantially reduces carbon deposits in engines. VP SEF lubricant package meets or exceeds JASO FD, ISO EGD and API TC standards, as well as all manufacturers inch specs, including: Stihl, Husqvarna, Echo, Maruyama, Shindaiwa & more! 4 Cycle Formulated for air cooled 4 cycle engines to handle heat and abuse in small engines