Premium Blend Heavy Duty Engine Oil - 15W-40 - Qt. - 12/case

Specifically formulated for the heavy duty inboard marine market, including cruisers and towboats calling for a 15W-40. Premium base stocks and additive package ingredients places Sierra Heavy Duty at the leading edge of lubrication technology. Meets API Service classification up to CK-4 Meets the performance specifications for API service classification SM Suitable for fuels on any sulfur level Not for use in gasoline engines equipped with catalytic converters Replaces: Shell Rotella T4, Delo 400, MerCruiser, Indmar, Pleasurecraft, Crusader, Volvo Penta, MasterCraft Sold in case pack only.