Sierra 25W-40 4-Stroke Synthetic Catalyst-Compatible Marine OilThis Sierra Synthetic Blend Engine Oil meets modern recreational 4-stroke engines with or without emission catalyst systems. Features: Minimizes corrosion that is formed inside the engine.; Displays enhanced detergent properties to suspend and prevent engine sludge formation.; Industry leading wear protection and deposit control.; Prevents excessive thinning under extreme performance operations.; Capitalizing on "ZDDP" anti-wear additive technology.; Prevents phosphorous depletion and extends the emission catalyst life.; NMMA FC-W Certified/API-SL; Interchangeable with: Mercury Marine; 92-8M0078629; How much oil does my engine need?It varies model to model, check out our Engine Oil Capacity Guide for more information and capacity charts!//