Sierra’s Premium Blend engine oil is specially formulated to meet the needs of inboard & stern drive marine engines.

• Sierra premium blend inboard engine oil
• SAE 25W-40
• 1 quart bottle
• Recommended for use with inboard and sterndrive engines
• Developed specifically for the marine environment and the high running stresses marine engines encounter
• Outperforms standard 4 cycle automotive engine oils
• Protects internal engine components from rust, corrosion, and from sticking piston rings
• Premium blend features high detergency, anti-oxidants, and antiwear proprties
• Excellent low temperature operating properties
• Meets or exceeds quality performance API, SJ, CF-4, and CH-4
• Ideal for use in Mercruiser, OMC and Volvo Penta engines
• NMMA FC-W certified
• Replaces Mercruiser 92-802837Q1, 92-858048Q01, 92-8M0078627
• Replaces Yamaha LUB-20W40-FC-12
• Replaces Bel-Ray 99730-BT1