• 25W-40 FC-W 4-Stroke Stern Drive Oil (55 Gallon)(208L)
Key Features:
• Formulated to provide excellent lubrication and corrosion protection
• Stern drive and inboard engines operate under high load and running stresses...

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 CATALYST certified and approved for all 4-...

Sierra 18-9400CAT-4 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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• 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...