Synthetic blend 25W-40 engine oil is formulated for stern drive & inboard marine engines. One Quart
- Sierra synthetic blend inboard engine oil
- SAE 25W-40
- 1 quart bottle
- Recommended for gasoline inboard and I/O engines
- 4-stroke oil is a blend of premium grade synthetic and mineral based stock with highly refined additives
- Developed specifically for the marine environment and the high running stresses marine engines encounter
- Protects internal engine components from rust, corrosion, and from sticking piston rings
- Features high detergency, anti-oxidants, and antiwear proprties
- Prevents thermal breakdown under high RPM's, extreme temperatures, and high load conditions
- NMMA FC-W certified/API-SL
- Replaces Mercury 92-8M0078629