Description
The Sierra 15W-40 Premium Blend Engine Oil is specifically formulated for heavy-duty inboard marine applications, including cruisers and towboats that operate under sustained load and demanding conditions. Designed to meet API service classification up to CK-4 as well as API SM performance requirements, it delivers dependable lubrication and protection for diesel marine engines. This premium blend supports engine durability by maintaining stable viscosity and protecting internal components under high stress operation. It is suitable for use with fuels of any sulfur level, making it adaptable to a wide range of marine fuel conditions. This oil is not intended for gasoline engines equipped with catalytic converters.
Features
- Formulated for heavy-duty inboard marine engines including cruisers and towboats
- Meets API CK-4 and API SM performance specifications
- Provides reliable lubrication under high load and sustained operation
- Compatible with fuels of any sulfur level for versatile marine use
- Not for use in gasoline engines with catalytic converters
- Meets API Service classification up to CK-4
- Meets the performance specifications for API service classification SM
- NOT for use in gasoline engines equipped with catalytic converters
- Replaces: Shell Rotella T4, Delco 400, MerCruiser, Indmar, Pleasurecraft, Crusader, Volvo Penta, MasterCraft
- Application: Inboard Ski
- Premium quality for longer life
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