Premium KTech engine oil is uniquely formulated for your machine. Longer engine life - Cleaner operation - Refined in the USA. KTech engine oil gives superior performance for the engine you depend on. Features - Meets JASO MA. API Service CJ-4 and SL. KTech 4-cycle oil contains a zinc additive which prevents excess wear on engine parts. Protects against excessive viscosity decrease at high temperatures. Proven oil consumption control in heavy-duty service. Contains anti-foaming and anti-shear agents. Excellent shear stability assures stay-in-grade performance. Manufactured with the latest additive technologies to provide superior performance in both diesel and gasoline engines(The 10W-30 oil is also certified in CJ-4 for use in diesel engines). Designed to keep today?s high-performance low-emission engines clean and operating at peak efficiency. 10W-30 10W-40 and 20W-50 synthetic blend oils provide ultimate performance and protection in both low and high temperature applications including cold-weather startup.