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.
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
Shop Oils by Brand
Marine Oil, Lubricant, Filter & Service Brands
Browse oil, lubricant, grease, fuel and oil filter, fluid-transfer, corrosion-protection, and service products by brand. Use the exact engine, drive, transmission, filter, or fluid specification before ordering.
Oil & Lubricant Subcategories
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.
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.
Filters
In-Line Fuel Filter
Keep your fuel supply cleaner with an In-Line Fuel Filter from SIERRA. Key Features In-line fuel filtration helps protect your engine’s fuel syste...
View full detailsFairview S362010C ORB To Female Pipe Fitting, 7/8"-16 ORB X 3/8" Pipe
Fairview S362010C ORB to Female Pipe fitting (7/8"-16 ORB x 3/8" pipe) designed for secure, leak-resistant connections in O-Ring Boss (ORB) hydraul...
View full detailsSeachoice 50-20938 Fuel/Water Separating Filter – Volvo/OMC – 10 Micron
Seachoice 50-20938 – 10-Micron Fuel/Water Separating Filter Part Number: 50-20938 (also referenced as 20938) Brand: Seachoice Filtration Rating: ...
View full detailsFairview S36208D ORB To Female Pipe Fitting, 3/4"-16 ORB X 1/2" Pipe
Fairview S36208D ORB to Female Pipe fitting is a plated steel ORB (O-Ring Boss) connector that joins a 3/4"-16 ORB port to a 1/2" female pipe conne...
View full detailsFairview S36208C ORB To Female Pipe Fitting, 3/4"-16 ORB X 3/8" Pipe
Fairview S36208C ORB to Female Pipe fitting connects a 3/4"-16 ORB port to a 3/8" pipe thread connection for straight, leak-tight adapter routing i...
View full detailsWSM PROK 006-585 Multi-Fit Flame Arrestor – Universal 70mm / 2.75 in. Single-Carb PWC
WSM PROK 006-585 Multi-Fit Flame Arrestor – Universal 70mm Single-Carburetor PWC Part Number: 006-585 (distributor SKU: 848-006585, catalog ref: 79...
View full detailsRacor S3227 10-Micron Replacement Fuel Filter Element – For 320R-RAC-01 / 320R-RAC-02
Racor S3227 10-Micron Replacement Fuel Filter Element – For 320R-RAC-01 / 320R-RAC-02 Part Number: S3227 (distributor SKU: 62-S3227) Brand: Racor T...
View full detailsRacor S3228SUL 2-Micron Replacement Fuel Filter Element – For 320R / 490R Series
Racor S3228SUL 2-Micron Replacement Fuel Filter Element – For 320R / 490R Series Part Number: S3228SUL (distributor SKU: 62-S3228SUL) Brand: Racor ...
View full detailsRacor S3240TUL 10-Micron Replacement Fuel Filter Element – For 120R-RAC-02 | 62-S3240TUL
Racor S3240TUL 10-Micron Replacement Fuel Filter Element – For 120R-RAC-02 Part Number: S3240TUL (distributor SKU: 62-S3240TUL) Brand: Racor Type: ...
View full detailsRacor S3240 10-Micron Replacement Fuel Filter Element – For 120R-RAC-01 | 62-S3240
Racor S3240 10-Micron Replacement Fuel Filter Element – For 120R-RAC-01 Part Number: S3240 (distributor SKU: 62-S3240) Brand: Racor Type: 10-micron...
View full detailsRacor S3232TUL 10-Micron Replacement Fuel Filter Element – For 660R-RAC-02 | 62-S3232TUL
Racor S3232TUL 10-Micron Replacement Fuel Filter Element – For 660R-RAC-02 Part Number: S3232TUL (distributor SKU: 62-S3232TUL) Brand: Racor Type: ...
View full detailsFairview S362010D ORB To Female Pipe Fitting, 7/8"-16 ORB X 1/2" Pipe
Fairview S362010D ORB to Female Pipe fitting provides a leak-tight connection by combining an O-Ring Boss (ORB) sealing interface with a female pip...
View full detailsRacor S3228TUL 10-Micron Replacement Fuel Filter Element – For 320R-RAC-02 / 490R Series
Racor S3228TUL 10-Micron Replacement Fuel Filter Element – For 320R-RAC-02 / 490R Series Part Number: S3228TUL (distributor SKU: 62-S3228TUL) Brand...
View full detailsRacor S3220TUL 10-Micron Replacement Fuel Filter Element – B32020MAM | Mercury MerCruiser Yamaha Volvo
Racor S3220TUL 10-Micron Replacement Fuel Filter Element – B32020MAM | Mercury / MerCruiser / Yamaha / Volvo Penta Part Number: S3220TUL (distribut...
View full detailsRacor S3213 10-Micron Replacement Fuel Filter Element – For B32013 Gasoline Separator
Racor S3213 10-Micron Replacement Fuel Filter Element – For Racor B32013 Gasoline Separator Part Number: S3213 (distributor SKU: 62-S3213) Brand: R...
View full detailsRacor 320R-RAC-02 Gasoline Fuel/Water Separator – 10 Micron | Metal Bowl | Inboard / Sterndrive
Racor 320R-RAC-02 Gasoline Fuel/Water Separator – 10 Micron | Metal Bowl | Inboard / Sterndrive Part Number: 320R-RAC-02 (distributor SKU: 62-320RR...
View full detailsRacor 660R-RAC-01 Gasoline Fuel/Water Separator – 10 Micron | Clear Bowl | Outboard
Racor 660R-RAC-01 Gasoline Fuel/Water Separator – 10 Micron | Clear Bowl | Outboard Part Number: 660R-RAC-01 (distributor SKU: 62-660RRAC01) Brand:...
View full detailsRacor B32013 Gasoline Fuel/Water Separator – 10 Micron | Clear Bowl | Outboard | 60 GPH
Racor B32013 Gasoline Fuel/Water Separator – 10 Micron | Clear Bowl | Outboard | 60 GPH Part Number: B32013 (distributor SKU: 62-B32013) Brand: Rac...
View full detailsRacor 320R-RAC-01 Gasoline Fuel/Water Separator – 10 Micron | Clear Bowl | Outboard
Racor 320R-RAC-01 Gasoline Fuel/Water Separator – 10 Micron | Clear Bowl | Outboard Part Number: 320R-RAC-01 (distributor SKU: 62-320RRAC01) Brand:...
View full detailsRacor 660R-RAC-02 Gasoline Fuel/Water Separator – 10 Micron | Metal Bowl | Inboard / Sterndrive
Racor 660R-RAC-02 Gasoline Fuel/Water Separator – 10 Micron | Metal Bowl | Inboard / Sterndrive Part Number: 660R-RAC-02 (distributor SKU: 62-660RR...
View full detailsRacor S3220SUL 2-Micron Replacement Fuel Filter Element – MerCruiser-Style 11/16"-16 | B32020MAM
Racor S3220SUL 2-Micron Replacement Fuel Filter Element – MerCruiser-Style | B32020MAM Part Number: S3220SUL (distributor SKU: 62-S3220SUL) Brand: ...
View full detailsRacor S3232 10-Micron Replacement Fuel Filter Element – For 660R-RAC-01 | 62-S3232
Racor S3232 10-Micron Replacement Fuel Filter Element – For 660R-RAC-01 Part Number: S3232 (distributor SKU: 62-S3232) Brand: Racor Type: 10-micron...
View full detailsRacor B32013 Gasoline Fuel/Water Separator – 10 Micron | Clear Bowl | Outboard
Racor B32013 Gasoline Fuel/Water Separator – 10 Micron | Clear Bowl | Outboard Part Number: B32013 (distributor SKU: 62-120RRAC01) Brand: Racor Typ...
View full detailsRacor 31871 Aquabloc II 2-Micron Replacement Filter – Twin Pack | Mercury Optimax / Verado
Racor 31871 Aquabloc® II 2-Micron Replacement Filter – Twin Pack Part Number: 31871 (distributor SKU: 62-31871) Brand: Racor Type: Replacement fuel...
View full detailsFilter-Water Sep OMC 21M5
Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline.All filters flow @ 90 GPH to feed even the hungriest motor.Cl...
View full detailsRacor 110A Fuel/Water Separator Filter – Gas & Diesel | 10 Micron
Racor 110A Fuel/Water Separator Filter – Gas & Diesel | 10 Micron Part Number: 110A (distributor SKU: 62-110A) Brand: Racor (Parker Hannifin) T...
View full detailsRacor R23298-10 SNAPP™ 10-Micron Replacement Fuel Filter/Water Separator with Drain
Racor R23298-10 SNAPP™ 10-Micron Replacement Fuel Filter/Water Separator with Drain Part Number: R23298-10 / R2329810 (distributor SKU: 62-R2329810...
View full detailsRacor S3214 10-Micron Replacement Fuel Filter Element – For B32014 | OMC Johnson Evinrude
Racor S3214 10-Micron Replacement Fuel Filter Element – For B32014 | OMC / Johnson / Evinrude Part Number: S3214 (distributor SKU: 62-S3214) Brand:...
View full detailsRacor RK 15211 Seal Service Kit – 500 Series Turbine Fuel Filter/Water Separator
Racor RK 15211 Seal Service Kit – 500 Series Turbine Fuel Filter/Water Separator Part Number: RK 15211 / RK15211 (distributor SKU: 62-RK15211) Bran...
View full detailsYamaha VST Filter
Yamaha VST (Vapor Separation Tank) Filter (SKU 47-79907) is a replacement fuel-system filter used as part of the vapor separation tank setup on sel...
View full detailsSierra 18-7919 Fuel/Water Separator Element – 10 Micron | Mercury, Yamaha, Racor Cross-Reference
Sierra 18-7919 Fuel/Water Separator Element – 10 Micron Part Number: 18-7919 (distributor SKU: 47-7919) Brand: Sierra International UPC: 8082821998...
View full detailsFilter Bracket-SS 3/8 NPT
Keep your fuel filtration system performing at its best with this Sierra stainless steel filter bracket/head replacement. Designed for a 3/8" NPT c...
View full detailsRacor 23299-10 SNAPP Fuel Filter/Water Separator Assembly – 10 Micron with Bracket
Racor 23299-10 SNAPP™ Fuel Filter/Water Separator Assembly – 10 Micron with Mounting Bracket Part Number: 23299-10 / 2329910 (distributor SKU: 62-2...
View full detailsSierra 18-7853-1 Aluminum Fuel/Water Separator Filter Bracket – 1/4" NPT
Sierra Aluminum Fuel/Water Separator Filter Bracket – 1/4" NPT Part Number: 18-7853-1 (distributor SKU: 47-78531) Brand: Sierra International UPC: ...
View full detailsRacor 120AS Fuel/Water Separator Filter – Diesel & Gas | 2 Micron | 15 GPH
Racor 120AS Fuel/Water Separator Filter – Diesel & Gas | 2 Micron | 15 GPH Part Number: 120AS (distributor SKU: 62-120AS) Brand: Racor Series: ...
View full detailsSierra 99202 Replacement Bowl, Racor Style, Clear Bowl
Sierra 99202 Replacement Bowl (Racor style) in a clear bowl design for quick visual checks on fuel/water separation performance. SKU 47-99202. Key ...
View full detailsFilter Bracket-Alum 3/8 NPT
This aluminum filter bracket head is made for 3/8" NPT fuel-port connections in Sierra-style fuel filter assemblies. Use it as a replacement mounti...
View full detailsSierra 18-99201 Clear Replacement Bowl – Racor-Style Spin-On Fuel/Water Separator
Sierra Clear Replacement Bowl – Racor-Style Spin-On Fuel/Water Separator Part Number: 18-99201 (distributor SKU: 47-99201) Brand: Sierra Internatio...
View full detailsSierra 7523 Air Filter For Mercury Optimax
Keep your Mercury Optimax running clean with a Sierra air filter designed as a replacement for the engine’s intake filtration needs. Key Features ...
View full detailsFilter Bracket-SS 1/4 NPT
Upgrade or replace your marine fuel/oil filter mounting point with this Sierra stainless-steel filter bracket featuring a 1/4" NPT connection. Key ...
View full detailsSierra / Marine Oil Filter GM Chevrolet Long Style / 47-78761
Marine Oil Filter for GM/Chevrolet Engines — Long StyleThe Sierra 47-78761 is a long-style marine oil filter for GM and Chevrolet-based marine engi...
View full detailsSierra 94004 Oil-25W40 FCW I/O-I/B, 5 Qt.
Formulated to provided excellent lubrication and corrosion protection. Developed for the marine environment and outperforms automotive engine oils ...
View full detailsSierra 94007 Oil-25W40 FCW I/O-I/B, 55 Gal. Drum
Formulated to provided excellent lubrication and corrosion protection. Developed for the marine environment and outperforms automotive engine oils ...
View full detailsCRC 75102 QD® Electronic Cleaner, 312 g, 12/case
CRC 75102 QD® Electronic Cleaner is a quick-drying, plastic-safe cleaner designed to dissolve dirt and debris from sensitive electronic components ...
View full detailsSierra 94002 Oil-25W40 FCW I/O-I/B, Qt.
Formulated to provided excellent lubrication and corrosion protection. Developed for the marine environment and outperforms automotive engine oils ...
View full detailsPanther DIY Series Oil Extractor
These compact, powerful pumps make oil changes fast, efficient and cleaner than you ever thought possible. They take less than 10 seconds to prime ...
View full detailsPanther DIY Series Oil Extractor
These compact, powerful pumps make oil changes fast, efficient and cleaner than you ever thought possible. They take less than 10 seconds to prime ...
View full detailsFluid/Oil Extractor, 7.5 Qt.
This economical, large capacity fluid extractor provides an easier, cleaner way to drain engines with hard to reach drain plugs. Ideal for most flu...
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