Guardian Motorcycle 20W-50 Semi Synthetic Engine Oil is a premium grade 4-stroke engine oil that meets the exacting demands of modern high-performance motorcycle engines. Advanced additive, high detergent formulation ensures maximum engine component protection and superior resistance to deposits and corrosion, resulting in extended engine life and optimum performance under the most arduous of conditions. Utilising Ester-Guard technology ensures our Guardian Motorcycle Range can cope with the rigours and stress generated by modern high-performance motorcycle engines. Rapid cold start circulation, providing maximum protection during initial start-up Passes crucial clutch friction test required to meet the JASO MA/MA2 specifications, allowing safe, predictable use in wet clutch applications Reduced phosphorous level to ensure excellent compatibility with catalysts now fitted to the latest motorcycles