Sierra 25W-40 FC-W Cat Synthetic Blend 4-Stroke Marine Engine Oil, Quart, Cross-Reference Mercury 92-8M0078629

Sierra 25W-40 FC-W Cat synthetic blend engine oil is formulated specifically for modern 4-stroke recreational marine engines, including those equipped with emission catalyst systems. This quart (946 mL) container delivers an oil that exceeds the NMMA FC-W standard and is FC-W Cat compatible, making it suitable for outboard, sterndrive, and inboard engines that call for catalyst-safe lubrication.

The 25W-40 viscosity synthetic blend formula is engineered to protect critical engine components across a range of operating temperatures while offering maximum corrosion protection, an important factor for engines that see regular exposure to moisture and marine environments. Because it is approved for all 4-stroke applications, this oil works across outboard, sterndrive, and inboard platforms rather than being limited to a single engine type.

This listing is for the single quart size; Sierra also packages this same 25W-40 FC-W Cat synthetic blend oil in 5 quart, 55 gallon, and pallet quantities under related part numbers for buyers who need larger volumes.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-9440CAT-2
• Size: Quart (946 mL)
• Case Quantity: 12
• Weight: 1 pound
• Viscosity: 25W-40
• Oil Type: Synthetic Blend
• Application: 4-Stroke Outboard, Sterndrive, and Inboard Engines
• Certification: Exceeds FC-W requirements; FC-W Cat Compatible
• UPC: 808282326029
• Mercury Cross Reference: 92-8M0078629

Fitment

Approved for all 4-stroke applications including outboard, sterndrive, and inboard engines, including engines equipped with emission catalyst systems.

Replaces (OEM)

92-8M0078629

Frequently Asked Questions

What viscosity is Sierra 18-9440CAT-2 oil? Sierra 18-9440CAT-2 is a 25W-40 viscosity synthetic blend engine oil.

Is this oil safe for engines with catalytic converters? Yes, Sierra 18-9440CAT-2 is FC-W Cat compatible, meaning it is formulated for 4-stroke engines with emission catalyst systems as well as those without.

What size container does 18-9440CAT-2 come in? This part number, 18-9440CAT-2, is packaged as a single quart (946 mL) container, sold 12 to a case.

Does Sierra 18-9440CAT-2 meet NMMA FC-W standards? It exceeds all 4-stroke requirements including the FC-W standard and is also FC-W Cat compatible.

Is 18-9440CAT-2 full synthetic or synthetic blend? Sierra 18-9440CAT-2 is a synthetic blend formula, not a full synthetic oil.

What engine types is this oil designed for? Sierra 18-9440CAT-2 is approved for all 4-stroke applications, including outboard, sterndrive, and inboard engines.

Is there a Mercury equivalent to Sierra 18-9440CAT-2? Yes, the Mercury cross-reference number for Sierra 18-9440CAT-2 is 92-8M0078629.

Does this oil offer corrosion protection? Sierra 18-9440CAT-2 is formulated to offer maximum corrosion protection for 4-stroke marine engines.

How much does one quart of 18-9440CAT-2 weigh? One quart of Sierra 18-9440CAT-2 weighs 1 pound.

Does Sierra offer this same oil in larger sizes? Yes, the same 25W-40 FC-W Cat synthetic blend formula sold as 18-9440CAT-2 in quart size is also available in 5 quart, 55 gallon, and pallet-quantity packaging under related Sierra part numbers.

What is the UPC for Sierra 18-9440CAT-2? The UPC for Sierra 18-9440CAT-2 quart oil is 808282326029.