Sierra Marine 4-Stroke Catalyst Engine Oil (MPN: 18-9440CAT-4)

High-performance synthetic blend for modern marine engines.

Sierra Marine 4-Stroke Catalyst Engine Oil is specifically formulated to meet the demands of high horsepower marine engines. This SAE 25W-40 synthetic blend oil is designed for both recreational engines with and without emission catalyst systems, ensuring optimal performance in various marine conditions. The oil minimizes corrosion within the engine and features enhanced detergent properties that help suspend and prevent sludge formation, contributing to a cleaner engine environment.

With industry-leading wear protection and deposit control, this engine oil prevents excessive thinning during extreme performance operations. It utilizes advanced ZDDP anti-wear additive technology to protect critical engine components, while also preventing phosphorous depletion, which extends the life of emission catalysts. Certified by NMMA FC-W and API-SL, this oil meets or exceeds the requirements of modern marine engines, making it a reliable choice for boat owners looking to maintain engine efficiency and longevity.

Features

• Meets Requirements Of Modern 4-Stroke Recreational Engines With Or Without Emission Catalyst Systems
• Minimizes Corrosion That Is Formed Inside The Engine
• Displays Enhanced Detergent Properties To Suspend And Prevent Engine Sludge Formation
• Industry Leading Wear Protection And Deposit Control
• Prevents Excessive Thinning Under Extreme Performance Operations
• Capitalizing On "ZDDP" Anti-Wear Additive Technology
• Prevents Phosphorous Depletion And Extends The Emission Catalyst Life
• NMMA FC-W Certified And API-SL

Specifications

• Manufacturer: Sierra Marine
• Manufacturer Part Number: 18-9440CAT-4
• Use: Marine Use
• Engine Type: 4 Stroke
• Viscosity Grade: SAE 25W-40
• Type: Synthetic
• Unit Size: 1.25 Gallon
• Unit Quantity: Single
• Universality: Semi-Universal
• Unit Type: Jug

Technical Documents

• 18-9440CAT-4_sds.pdf

Product Videos