With 75 years experience and multiple championship successes you can be sure that Rock Oil knows a thing or two about oils!Rock Oil Guardian is a premium grade semi-synthetic 4-stroke oil. In a time of ever increasing performance and longer service intervals todays modern motorcycles have put ever increasing demands on engine oils. Rock Oil using their very latest technology in synthetics and additives have developed `Guardian Semi-Synthetic`, answering all the latest demands put on engine oils. Formulated to give maximum protection `Guardian Semi-Synthetic` provides rapid circulation from cold starts and complete protection at high temperatures even in the most extreme of environments.Recommended Application - Modern High Performance 4-Stroke MotorcyclesSpecification - JASO MA/ API SL/ ACEA A3Available Viscosity - 10W/40Available Sizes - 1Ltr, 4Ltr