Boat Oils, Lubricants & Filters | St. Paul Marine Supply
Boat Oils, Lubricants & Filters
Keep your outboard running strong with quality marine oils and lubricants from Boaters Outlet. We stock Mercury Quicksilver, Yamaha Yamalube, and Suzuki Marine oils, along with gear lube and oil filters for proper engine maintenance. Get expert advice on the right products for your motor and access professional service when you need it.
Premium Marine Oil Brands We Carry
We stock trusted marine oil brands designed specifically for outboard performance and protection.
Mercury Quicksilver provides OEM-quality oils and lubricants engineered for Mercury and Mariner outboards.
Yamaha Yamalube is formulated specifically for Yamaha marine engines to deliver optimal performance and longevity.
Suzuki Marine oils are factory-recommended for Suzuki outboards and built to meet exact engine requirements.
All brands are available in 2-stroke and 4-stroke options, including both synthetic and conventional formulas.
Complete Marine Oils & Lubricants
2-Stroke Outboard Oil
Quality 2-stroke oil is essential for older outboard motors. We carry TCW3-certified marine oils from Mercury, Yamaha, and Suzuki to ensure proper lubrication and performance.
Conventional options provide a cost-effective solution for recreational use. Premium oils burn cleaner, reducing smoke and engine deposits while extending engine life. Synthetic blends offer enhanced lubrication, improved cold-weather performance, and reduced carbon buildup.
Most 2-stroke outboards use a 50:1 fuel-to-oil ratio, though some older motors may require different mixtures. Always verify your engine’s specifications before mixing fuel.
4-Stroke Outboard Oil
Modern 4-stroke outboards require marine-specific oil designed for water environments. Automotive oil should never be used.
We carry marine 4-stroke oils in multiple viscosities to match your engine’s needs. 10W-30 is the most common option for all-season use, especially in Minnesota conditions. Heavier oils such as 25W-40 are ideal for high-temperature performance or engines with more operating hours.
Synthetic oils offer superior protection and longer service intervals, while conventional oils provide a reliable and cost-effective option.
Marine Gear Lube
Lower unit gear lube protects your outboard’s gears and bearings from water intrusion, corrosion, and extreme pressure. Regular maintenance is critical to prevent costly damage.
Gear lube should be changed at least once per year or every 100 hours of operation. If the oil appears milky or cloudy, it may indicate water contamination and should be addressed immediately.
Routine inspection during spring preparation helps ensure your lower unit is ready for the season.
Oil Filters
We carry OEM-quality oil filters for Mercury, Yamaha, and Suzuki 4-stroke outboards. Replacing the oil filter during every oil change is essential for maintaining engine performance and longevity.
Using the correct filter ensures proper oil flow and filtration. Our team can help you find the right filter based on your engine model and specifications.
Fuel Additives & Stabilizers
Protect your fuel system with marine-grade additives and stabilizers. Fuel stabilizers are especially important during winter storage to prevent fuel breakdown and buildup inside the engine.
We carry products designed to treat ethanol, clean carbon deposits, and improve overall fuel system performance.
Greases & Lubricants
Keep moving parts protected with marine-grade greases and lubricants. We offer water-resistant grease, trailer bearing grease, corrosion inhibitors, and anti-seize compounds to support routine maintenance and long-term durability.
Choosing the Right Marine Oil
Selecting the right oil depends on your engine type and manufacturer recommendations.
2-stroke engines require TCW3-certified oil and proper fuel mixing ratios. 4-stroke engines require marine-specific oil with the correct viscosity, typically 10W-30.
Using manufacturer-recommended oils ensures proper lubrication and long-term engine performance. Each brand designs its oils to match specific engine tolerances and operating conditions.
If you’re unsure what you need, bring your engine information and our team will help you choose the correct products.
Outboard Oil Change Schedule
Regular maintenance keeps your engine running smoothly and prevents long-term damage.
4-stroke oil should be changed every 100 hours of operation or at least once per year. The first oil change is typically recommended after the initial break-in period.
2-stroke oil is added with every fuel fill, either through premixing or an oil injection system.
Gear lube should also be replaced every 100 hours or annually, and oil filters should be changed with every oil service.
Seasonal maintenance is key. Spring is a great time to change oil before launch, while fall is ideal for adding fuel stabilizer before storage.
Professional Oil Change & Maintenance Services
Our experienced marine technicians provide professional oil changes and maintenance services to keep your outboard running at its best.
Services include oil and filter changes, gear lube replacement, fuel system treatment, pre-season maintenance, and winterization.
Professional service ensures proper fluid disposal, accurate product selection, and a full inspection of related systems for reliable performance.
Spring & Fall Oil Maintenance
Seasonal maintenance helps extend the life of your engine and prevent unexpected issues.
In spring, changing engine oil and inspecting gear lube ensures your boat is ready for the season. Fresh fuel and stabilizer treatment help optimize performance.
In fall, oil changes remove contaminants before storage, while gear lube replacement and fuel stabilizer protect the engine during winter months.
Marine Oil FAQ
Can I use automotive oil in my outboard engine?
No, marine engines require oil specifically designed for water environments. Automotive oil lacks the corrosion protection needed for marine use.
What is the difference between 2-stroke and 4-stroke oil?
2-stroke oil is burned with fuel and must meet TCW3 standards. 4-stroke oil lubricates the engine separately and includes marine-specific additives.
How often should I change my outboard oil?
4-stroke engines should be serviced every 100 hours or annually. Gear lube should be changed on the same schedule, while 2-stroke oil is added continuously with fuel.
What type of oils do you carry?
We carry Mercury Quicksilver oils, as well as Yamaha and Suzuki options.
Do you offer oil change services?
Yes, our service department provides professional oil changes, filter replacements, and complete maintenance services.
Get Quality Marine Oils & Professional Service
Visit Boaters Outlet in St. Paul for marine oils, filters, and lubricants from Mercury, Yamaha, and Suzuki. Our knowledgeable team will help you find the right products for your outboard motor and keep your boat running strong all season long.