• 25W-40 Catalyst Oil (55 Gallon)(208L)
Key Features:
• Meets modern recreational 4-stroke engines with or without emission catalyst systems
• Approved for all 4-stroke applications including Outboard, Sterndrive and Inboard...

Sierra 18-9410-2 synthetic oil is a special blend of synthetic base oil and a balanced additive system that exceeds FC-W requirements. Recommended for gasoline and diesel inboard and sterndrive engines. Replaces select Mallory, OMC Stern Drive, and...

• SAE 30 Full Synthetic Oil (55 Gallon)(208L)
Key Features:
• Special blend of synthetic base oil and a balanced additive system that exceeds FC-W requirements
• Recommended for gasoline and diesel inboard and sterndrive...

Sierra 18-9420CAT-2 4-stroke catalyst oil is approved for all 4-stroke applications including outboard, sterndrive, and inboard. It provides superior corrosion protection under extreme conditions as well as industry leading deposit control.
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Capitalizing on "ZDDP" anti-wear additive technology for maximum corrosion protection, this formula offers advanced lubrication for extended engine life and prevents phosphorous depletion. It is NMMA FC-W certified and approved for all 4-stroke...

• 10W-30 Catalyst Oil (55 Gallon)(208L)
Key Features:
• Meets requirements of modern 4-stroke recreational engines with or without emission catalyst systems
• Approved for all 4-stroke applications including Outboard,...

Sierra 18-9440-2 is a 4-cycle oil blended with premium grade synthetic and mineral based stock. It features superiorly designed additives formulated for the stress endured by sterndrive and inboard engines, and is extensively tested for outstanding...

• 25W-40 FC-W Synthetic Blend Oil (55 Gallon)(208L)
Key Features:
• 4-cycle oil blended with premium grade synthetic and mineral based stock
• Superior designed additives formulated for the stress endured by sterndrive and...

• 25W-40 FC-W Synthetic 4-Stroke O/B Oil (1 Litre)(1.0556 qt.)
Key Features:
• Blended with premium grade synthetic and mineral based stock
• Combined with superior designed additives formulated for the extreme marine...

Sierra 18-9440CAT-2 synthetic blend catalyst oil features industry leading wear protection and deposit control. It prevents excessive thinning under extreme performance operations, and minimizes corrosion that is formed inside the engine.
Meets...