2 stroke oil for modern engines exceeds jaso fc and api tc aplications castrol act evo 2t is a modern high quality 2 stroke engine oil for modern engines continuous protection for easy start and go its deposit protection formula is designed to provide continuous protection against the build up of carbon deposits on the engine and spark plug during use keeping them clean to ensure fast and reliable starting castrol actevo 2t has been designed to give superior protection for modern 2 stroke engin