Sierra 118-9400CAT-4 Premium Blend 25W-40 FC-W Catalyst Compatible Marine Engine Oil 5 Quart

Sierra 118-9400CAT-4 is a premium blend 25W-40 4-stroke marine engine oil specifically formulated for modern sterndrive and inboard engines equipped with catalytic converters. This FC-W certified catalyst-compatible oil is designed to meet the unique requirements of recreational marine engines from manufacturers like MerCruiser, Volvo Penta, Ilmor, Indmar, and PCM.

Key Features:

• Premium blend formula combining synthetic and mineral-based stock for superior performance
• Special low-phosphorus ZDDP anti-wear additive prevents catalyst poisoning and extends emission system life
• NMMA FC-W Catalyst Compatible certified for 4-stroke marine applications
• High detergency formula protects internal engine components from rust, corrosion, and sticking piston rings
• Excellent thermal stability removes breakdown under high RPMs, extreme temperatures, and loads
• Superior anti-oxidant and anti-wear properties for extended engine life
• Developed specifically for the high-stress marine environment

This 5-quart (1.25 gallon) jug comes with a convenient handle and pour spout for easy oil changes. Approved for use in all 4-stroke applications including outboards, sterndrives, and inboard engines with or without catalyst emission systems. Exceeds all FC-W and FC-W Catalyst Compatible requirements.