Sierra 18-9558-4 5W-30 FC-WCAT Full Synthetic Marine Engine Oil - 5 Quart

Ultra-high engine performance oil that utilizes premium base stocks and industry leading additives Enhanced detergent package to suspend and prevent sludge Reduces friction to maintain high performance High shear stability maintains viscosity, prevent excessive thinning in high performance application Advanced ZDDP additive technology prevents phosphorus depletion extending catalyst lifeYou may also like Sierra 18-9393 Oil Change Kit for Select Yamaha Outboard Marine Engines.