For more than five decades, Sierra International has been a trusted leader in high-quality aftermarket engine and drive components. Originally focused on the marine industry, Sierra has expanded its product line to also serve RVs, ATVs/UTVs, and outdoor power equipment. The brand brings together Sierra, Prime Line, Shields, and Moeller products under one name, offering customers a comprehensive range of solutions for both land and water applications.

From engine and drive parts to oils, lubricants, filtration, instrumentation, connectors, and general hardware, every Sierra product is engineered to meet or exceed OEM performance standards. Their commitment to quality ensures dependable operation, whether maintaining a fishing boat, upgrading a recreational vehicle, or servicing utility equipment.

With distribution operations in Litchfield, Illinois, Sierra International supports American jobs and provides quick access to parts across the United States. Built on a legacy of innovation, durability, and customer trust, Sierra continues to be the go-to choice for those who expect top-tier performance from their equipment.



Sierra Marine 25W-40 FC-W Oil is designed for sterndrive and inboard 4-stroke engines. It offers enhanced film strength, oxidation stability, and corrosion resistance in harsh marine environments. 

NMMA-certified and safe for freshwater and saltwater use.

SIERRA MARINE 25W-40 FC-W 4-STROKE STERNDRIVE OIL (Quart)

Motor Oil

Stern drive engine oil for 4-stroke marine engines.

SIERRA MARINE 25W-40 FC-W 4-STROKE STERNDRIVE OIL (Quart)

$14.90

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