
Marine Engine Oil
Ensure peak performance and protection for your outboard motor with our curated selection of marine engine oils and lubricants. Whether you're using a 2-stroke or 4-stroke engine, we offer top-rated brands like Yamaha, Mercury, and Quicksilver—all trusted by boaters worldwide.
Why Choose Our Marine Oil Products?
- ✅ OEM-approved formulations for top brands
- ✅ Protection against rust, corrosion, and wear
- ✅ Available in multiple sizes for your needs
- ✅ Fast shipping and easy returns
Need Help Choosing the Right Oil?
Check out our Marine Oil Buying Guide for tips on selecting the best lubricant for your boat's engine type, climate, and maintenance schedule.
Marine engine oil is a specialized lubricant designed for use in marine engines, such as outboard motors, inboard engines, and sterndrive systems. This high-quality oil is formulated to withstand the harsh operating conditions of marine environments, including high temperatures, heavy loads, and saltwater exposure. Marine engine oil helps protect engine components from wear and corrosion, ensuring optimal performance and longevity. It provides superior lubrication to critical engine parts, such as pistons, cylinders, and bearings, while also helping to maintain proper engine cleanliness. Choose the right Marine Engine Oil for your vessel to ensure smooth operation and maximum durability.
-
Marine Engine Oil 25W-50 1lt - 18-9552-8
SIERRA MARINE
$17.09MARINE ENGINE OIL 25W-50 1LTFor use in supercharged Mercury VeradoSemi-Synthetic formulation for superior protection under high loads and operating stressNMMA FC-W Certified/API-SLBottle Size: 1 Liter or 1.0556 quartSdc: 10.02Mercury...$17.09 -
Multi-vehicle Engine Oil 15W-40 5qt - 18-9554-4
SIERRA MARINE
MSRP: $50.79$44.39Multi-vehicle Engine Oil 15W-40 5qt - 18-9554-4Specifically formulated for the heavy duty inboard marine market, including cruiser and towboatsMeets API Service classification up to CK-4Meets the performance specifications for API service classification...MSRP: $50.79$44.39 -
Quicksilver 92-8M0148476 4-Stroke FC-W Marine Engine Oil 10W-40, Qt., 6/case
Quicksilver
$17.99Four stroke mineral base oil is recommended for use in all four stroke marine outboard, stern drive and inboard engines. It is SAE 10W-40 weight oil. Meets or exceeds all marine engine manufacturer's warranty requirements and recommendations for...$17.99 -
Quicksilver Oil 10W-30 4-Stroke Marine Oil Quicksilver 8M0142146
Quicksilver
MSRP: $55.99$41.99Quicksilver® SAE 10W-30 Synthetic Blend 4-Stroke Marine Engine Oil will have your boat engine slashing waves like nothing else. Designed specifically to keep your 4-cycle outboard, sterndrive, or inboard engine operating smoothly. Quicksilver...MSRP: $55.99$41.99 -
Semi-Synthetic Mercury Oil 25W-40 FC-W 4L - 18-9440-3
SIERRA MARINE
MSRP: $71.09$40.76Semi-Synthetic Oil 25W-40 FC-WBlended with premium grade synthetic and mineral based stockCombined with superior designed additives formulated for the extreme marine environmentSuperior corrosion protectionAdvanced lubrication of wear to internal engine...MSRP: $71.09$40.76 -
Semi-Synthetic Oil Mercury 25W40 1qt - 18-9440-2
SIERRA MARINE
MSRP: $17.89$14.89SEMI-SYNTHETIC OIL MERCURY 25W40 1QT4-cycle oil blended with premium grade synthetic and mineral based stockSuperior designed additives formulated for the stress endured by sterndrive and inboard enginesSuperior corrosion protectionAdvanced lubrication...MSRP: $17.89$14.89 -
Semi-Synthetic Oil Mercury 25W40 5qt - 18-9440-4
SIERRA MARINE
MSRP: $83.69$66.494-cycle oil blended with premium grade synthetic and mineral based stockSuperior designed additives formulated for the stress endured by sterndrive and inboard enginesSuperior corrosion protectionAdvanced lubrication for reduction of wear to internal...MSRP: $83.69$66.49 -
Semi-Synthetic Oil Suzuki 10W-40 Qt - 18-9551-2
SIERRA MARINE
$12.09SEMI-SYN OIL SUZUKI 10W-40 QTDirect Suzuki replacement oilSemi-Synthetic formulation for superior protection under high loads and operating stressNMMA FC-W Certified/API-SLSize: 1 Quart or 946mlSdc: 6.65Suzuki Outboard990C0-01E30-QUA990C0-10W40-1QT$12.09 -
Sierra Marine 25W-40 FC-W Synthetic 4-Stroke O/B Oil, 1 Liter - 18-9440-8
SIERRA MARINE
MSRP: $18.19$8.78Blended with premium grade synthetic and mineral based stockCombined with superior designed additives formulated for the extreme marine environmentSuperior corrosion protectionAdvanced lubrication of wear to internal engine componentsMinimized piston...MSRP: $18.19$8.78 -
Yamaha Oil Change Kit - 18-9391
SIERRA MARINE
$63.79For use with yamaha outboard f75/ f80/ f90/ f100 and f115 models; with 4-stroke oil/ oil pan drain gasket/ oil filter/ oil change funnelYamaha OutboardLUB-MRNMD-KT-10LUB-MRNMD-KT-11$63.79