The amount of oil included in this kit is adequate for most of the specifically noted Mercury outboard models. If your particular outboard requires additional oil, please be sure to purchase this separately. Mercury FC-W 10W-30 Synthetic Blend Marine Engine Oil This new to market Mercury synthetic blend 4-stroke marine engine oil outperforms automotive oil in marine applications because of its specialized additive package designed for marine engines. Mercury 10W 30 Synthetic Blend engine oil offers: Industry leading shear and corrosion protection for Mercury outboards Advanced corrosion inhibitors that outperform FC-W standards 33% greater camshaft wear protection compared to other marine oils Protection in harsh marine environments, as well as during intermittent use and off-season storage Want to know more about how your engine is breaking-in or wearing? Curious about whether or not your oil is doing its job? Want to be ahead of problems that may develop? PartsVu has partnered with B