LION MARINE 420 is a trunk piston engine oil for crankcase lubrication requirements of high-output medium speed engines and other similar marine type application.It is formulated from high quality solvent-refined paraffin base oils, combined with an effective additive package providing enhanced load-carrying ability, efficient oxidation stability and effective dispersancy/detergency . It provides effective acid neutralization and alkalinity retention in service, even when high sulphur fuel is used.