CASTROL ACT>EVO 4T 10W-40 | 20W-50 Features Trizone Technology for protection of the engine, clutch and gears Special wear protection additives for continuous Start & Go protection Outstanding oxidation and wear control throughout the drain period Complies with requirements of catalyst equipped engines Start and Go! Castrol Act>evo 4T is a modern mineral 4-stroke engine oil suitable for large mono and twin cylinder touring, custom and On Off bikes with air cooled engines. It is also suitable for the majority of classic bike requiring a product with a strong resistance to evaporation. Castrol Act>evo 4T employs the very latest Trizone Technology™ that gives optimum protection to the engine, clutch and gears even under the most arduous conditions, including sustained operations at high rpm