VP SEF two-cycle blends use the highest quality, cleanest burning synthetic oil on the market. It's virtually smoke-free and substantially reduces carbon deposits in engines. VP SEF's lubricant package meets or exceeds JASO FD, ISO-EGD and API TC standards as well as all manufacturers' specs, including STIHL, Husqvarna, ECHO, Maruyama, Shindaiwa and more.