RV, Marine & Generator Engine Oils

Find engine oils for specified RV generator, marine and vehicle applications, including products from Sierra Marine and Cummins. The selection includes different viscosity grades, formulations and container sizes, so choosing the correct lubricant starts with the engine manufacturer's requirements.

Compare oil specifications

Check the exact product number, listed viscosity, relevant performance specification and intended engine use. Do not assume that oils with similar viscosity labels are suitable for the same equipment.

For maintenance supplies, browse engine, generator and marine oil filters.

Explore Related Brand Collections

Find red line oil engine gear transmission fluids. Compare the exact part number, fitment and manufacturer specifications before ordering.

Fuel and Oil Treatments

For separate maintenance treatments, browse Hot Shot's Secret fuel, diesel and oil additives. Additives are not replacements for the engine oil or coolant specified by the equipment manufacturer.