TriboDyn¨ Patented 15W-40 Fully Synthetic Heavy Duty Engine OilÊhas been approved for all street & off road vehicles including high performance & all forms of racing, powerboats and other stationary & mobile equipment. It is a high performance and specially engineered engine oil for heavy duty diesel and gasoline engines operating under all service conditions, including all-season use in diesel powered or a mix of gasoline and diesel powered equipment. It can be recommended for service requirements of virtually all diesels and gasoline engine manufacturers. It can be recommended to both newer and older engines, including L.P.G and natural gas engines. Specifically designed for todayÕs high performance diesels, including diesels with oil fired injectors and turbocharged engines, and low-emissions diesel engines equipped with Exhaust Gas Recirculation (EGR) and Diesel Particulate Filter. Keeps engines & pistons clean & soot suspended in oil despite longer drain intervals increased soot loading.