Sierra 118-9470-4 Dexos 5W-30 Full Synthetic Engine Oil 5 Quart

The Sierra 118-9470-4 is a Dexos-approved 5W-30 full synthetic engine oil formulated to meet the demanding requirements of GM-powered marine inboard and sterndrive engines. This 5-quart container provides a convenient supply for complete oil changes in applications requiring Dexos-certified lubricants.

Sierra's synthetic 5W-30 engine oil delivers superior protection across a wide temperature range, offering excellent cold-start performance and high-temperature stability. The full synthetic formulation resists oxidation and thermal breakdown, helping extend engine life and maintain consistent lubrication under the heavy loads common in marine applications.

Key Features:

• GM Dexos certified – meets or exceeds Dexos performance standards required by many late-model GM engines
• Full synthetic formula – provides superior wear protection compared to conventional oils
• 5W-30 viscosity – ideal for a wide range of operating temperatures
• 5-quart container – sufficient for a full oil change on most applicable engines
• Marine-grade formulation – engineered for the high-load, high-heat demands of marine powerplants
• Helps reduce engine deposits and sludge buildup
• Compatible with GM inboard and sterndrive engines requiring Dexos approval

Sierra is a trusted brand in the marine aftermarket, offering a comprehensive line of maintenance products designed to keep marine engines running at peak performance. Always refer to your engine manufacturer's specifications to confirm the correct oil grade and certification before use.