Oils & Lubricants
Marine Oils & Lubricants
Marine Engine Oils, Gear Lube, Transmission Fluid & Grease
Shop marine engine oil, transmission fluid, gear oil, hydraulic fluid, grease, oil filters, oil change pumps, corrosion protection fluids, and lubrication products for engine and drive-system maintenance.
Fitment Check
Ask Parts Desk
Match oil type, viscosity, specification, engine model, drive type, transmission model, and service interval before ordering fluids.
Use the oil, lubricant, and fluid specifications listed by the engine or drive manufacturer. Confirm viscosity, marine rating, capacity, filter match, and service procedure before maintenance.
Top OEM Oil & Lubricant Searches
Volvo PentaEngine oil, drive lube, coolant additives, and service fluids Mercury MerCruiserEngine oil, gear lube, DFI oil, and service fluids YanmarDiesel engine oil, transmission fluid, and filters CrusaderGas inboard oil and maintenance fluids IndmarWatersports engine oil and service supplies PCMInboard oil, filters, and lubricant support
Oil & Lubricant Subcategories
Engine OilFC-W, diesel, synthetic, and conventional oils 2-Stroke OilOutboard and DFI oil options Gear OilOutdrive, lower unit, and gearcase lubrication Transmission FluidMarine gearbox and hydraulic drive fluids Hydraulic FluidSteering, trim, and hydraulic system fluids Marine GreaseWater-resistant grease for fittings and hardware Oil FiltersSpin-on and cartridge oil filter replacements Oil Change PumpsManual and electric oil extraction tools Anti-Rust & AdditivesCorrosion protection and service additives
Fitment
Use the Correct Specification, Not Just the Brand
Marine oils and fluids are selected by viscosity, certification, application, and equipment requirement. Check the engine manual, drive manual, transmission plate, or existing part number before mixing or replacing fluids.
Service
Fluids Tell a Story
Milky oil, burnt smell, metal flakes, dark gear lube, low fluid level, or repeated contamination can point to leaks, water intrusion, overheating, wear, or improper service.
Record hours, date, oil type, filter part number, quantity, and observations at every oil or fluid change.
Engine Oils
Marine gasoline, diesel, 2-stroke, synthetic, and OEM-approved oils help protect engines under load.
Drive & Gear Fluids
Gear lube, lower-unit oil, transmission fluid, and hydraulic fluid protect drives, gearboxes, trim, and steering systems.
Grease & Additives
Marine grease, anti-rust agents, corrosion inhibitors, and service additives support long-term maintenance.
Maintenance
Build Oil Changes Around the Whole Service
A proper oil or fluid service includes filters, drain plugs, gaskets, pumps, absorbent pads, inspection, correct disposal, and a final leak check after running the engine.
Change filtersReplace oil filters and seals when changing oil unless the service manual says otherwise.
Use clean transfer toolsKeep oil pumps, funnels, hoses, and containers clean to avoid contamination.
Check for waterMilky engine oil or gear lube can indicate water intrusion and should be investigated.
Dispose properlyUsed oil, filters, and absorbents should be handled as waste fluids according to local rules.
FAQ
Oils & Lubricants Questions
What oil should I use in my marine engine?
Use the viscosity and specification listed by the engine manufacturer. Marine gasoline engines often require NMMA FC-W oil, while marine diesels and OEM engines may call for specific diesel or OEM-approved oils.
How often should boat engine oil be changed?
Follow the engine manual. Many recreational engines are serviced annually or by engine hours, whichever comes first, and more often after contamination or severe use.
Is gear oil the same as engine oil?
No. Gear oil, lower unit lube, engine oil, transmission fluid, and hydraulic fluid are different products with different specifications. Use the correct fluid for the component.
Why is my gear oil milky?
Milky gear oil usually suggests water contamination. Inspect seals, drain plugs, gaskets, and pressure-test the drive or gearcase as recommended before refilling.
Ready for Fluid Service?
Shop Marine Engine Oil, Gear Lube, Transmission Fluid, Grease & Filters
Search by engine brand, viscosity, OEM part number, oil type, fluid specification, filter part number, drive type, or maintenance task.
Yanmar 15W-40 Marine Engine Oil - 1 Gallon OEM Lubricant
Original price
$69.76
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Original price
$69.76
Original price
$69.76
$69.76
$69.76
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$69.76
Current price
$69.76
Out of stock
Yanmar 15W-40 Marine Diesel Engine Oil - 1 Gallon This genuine Yanmar 15W-40 marine diesel engine oil is specifically formulated for Yanmar marine ...
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Original price
$69.76
-
Original price
$69.76
Original price
$69.76
$69.76
$69.76
-
$69.76
Current price
$69.76
Sold out
Synthetic 15W40 Diesel/Marine Engine Oil - 1 Gallon
Original price
$362.00
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Original price
$362.00
Original price
$362.00
$362.00
$362.00
-
$362.00
Current price
$362.00
Out of stock
Premium Synthetic 15W40 Diesel/Marine Engine Oil - 1 Gallon High-performance synthetic multi-grade engine oil specifically formulated for marine di...
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Original price
$362.00
-
Original price
$362.00
Original price
$362.00
$362.00
$362.00
-
$362.00
Current price
$362.00
Sold out