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Celebrating over 50 years of Trusted Marine Service
Over 50 years of Trusted Marine Service

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.

Shop Oils & Lubricants Engine Oil Gear Oil
Fitment Check

Match oil type, viscosity, specification, engine model, drive type, transmission model, and service interval before ordering fluids.

Ask Parts Desk

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.

Quick ShopTop OEMFitmentFluid TypesServiceFAQOil Change PumpsOil Filters

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.

10W-30 Marine Oil15W-40 Marine OilFC-W Oil

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.

OIL

Engine Oils

Marine gasoline, diesel, 2-stroke, synthetic, and OEM-approved oils help protect engines under load.

DRV

Drive & Gear Fluids

Gear lube, lower-unit oil, transmission fluid, and hydraulic fluid protect drives, gearboxes, trim, and steering systems.

GRS

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.

Shop Oils & LubricantsOil FiltersOil Change Pumps

Filters

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Fuel / Water Separator Kit

Fuel / Water Separator Kit

$89.79 - $89.79
$89.79
$89.79 - $89.79
$89.79

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removin...

View full details
$89.79 - $89.79
$89.79
$89.79 - $89.79
$89.79
Fuel Filter, Yanmar

Fuel Filter, Yanmar

$18.39 - $18.39
$18.39
$18.39 - $18.39
$18.39

Fuel Filter, Yanmar

$18.39 - $18.39
$18.39
$18.39 - $18.39
$18.39
Sierra 79809 Yamaha Replacement Fuel Filter Element

Sierra 79809 Yamaha Replacement Fuel Filter Element

$36.19 - $36.19
$36.19
$36.19 - $36.19
$36.19

Refer to the Sierra catalog for complete application information.

$36.19 - $36.19
$36.19
$36.19 - $36.19
$36.19
Sierra 8622 Suzuki Fuel Filter

Sierra 8622 Suzuki Fuel Filter

$56.39 - $56.39
$56.39
$56.39 - $56.39
$56.39

Fuel Filter

$56.39 - $56.39
$56.39
$56.39 - $56.39
$56.39
Fuel / Water Separator Kit

Fuel / Water Separator Kit

$89.19 - $89.19
$89.19
$89.19 - $89.19
$89.19

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removin...

View full details
$89.19 - $89.19
$89.19
$89.19 - $89.19
$89.19
Fuel / Water Separator Bonus Pack

Fuel / Water Separator Bonus Pack

$110.19 - $110.19
$110.19
$110.19 - $110.19
$110.19

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removin...

View full details
$110.19 - $110.19
$110.19
$110.19 - $110.19
$110.19
Fuel / Water Separator Kit

Fuel / Water Separator Kit

$77.49 - $77.49
$77.49
$77.49 - $77.49
$77.49

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removin...

View full details
$77.49 - $77.49
$77.49
$77.49 - $77.49
$77.49
In-Line Fuel Filter

In-Line Fuel Filter

$13.19 - $13.19
$13.19
$13.19 - $13.19
$13.19

In-Line Fuel Filter

$13.19 - $13.19
$13.19
$13.19 - $13.19
$13.19
Sierra 7981 Mercury/Mercruiser Replacement Fuel Filter Element

Sierra 7981 Mercury/Mercruiser Replacement Fuel Filter Element

$50.29 - $50.29
$50.29
$50.29 - $50.29
$50.29

Refer to the Sierra catalog for complete application information.

$50.29 - $50.29
$50.29
$50.29 - $50.29
$50.29
Replacement Water Separating Fuel Filter, Short

Replacement Water Separating Fuel Filter, Short

$24.99 - $24.99
$24.99
$24.99 - $24.99
$24.99

Replacement Water Separating Fuel Filter

$24.99 - $24.99
$24.99
$24.99 - $24.99
$24.99
Sierra 79799 Yamaha Replacement Fuel Filter Element

Sierra 79799 Yamaha Replacement Fuel Filter Element

$35.79 - $35.79
$35.79
$35.79 - $35.79
$35.79

Refer to the Sierra catalog for complete application information.

$35.79 - $35.79
$35.79
$35.79 - $35.79
$35.79
In-Line Fuel Filter

In-Line Fuel Filter

$15.49 - $15.49
$15.49
$15.49 - $15.49
$15.49

In-Line Fuel Filter

$15.49 - $15.49
$15.49
$15.49 - $15.49
$15.49
Sierra 78866 Fuel Element Assembly

Sierra 78866 Fuel Element Assembly

$47.59 - $47.59
$47.59
$47.59 - $47.59
$47.59

Filters allow water to be drained from the filter to extend sevice life. AquaVue™ Clear Bowls: Use for outboard and above deck installations. Metal...

View full details
$47.59 - $47.59
$47.59
$47.59 - $47.59
$47.59
Replacement Water Separating Fuel Filter, Long

Replacement Water Separating Fuel Filter, Long

$24.99 - $24.99
$24.99
$24.99 - $24.99
$24.99

Replacement Water Separating Fuel Filter

$24.99 - $24.99
$24.99
$24.99 - $24.99
$24.99
Sierra 7979 Mercury/Yamaha Replacement Fuel Filter Element

Sierra 7979 Mercury/Yamaha Replacement Fuel Filter Element

$32.39 - $32.39
$32.39
$32.39 - $32.39
$32.39

Refer to the Sierra catalog for complete application information.

$32.39 - $32.39
$32.39
$32.39 - $32.39
$32.39
In-Line Fuel Filter

In-Line Fuel Filter

$16.79 - $16.79
$16.79
$16.79 - $16.79
$16.79

In-Line Fuel Filter

$16.79 - $16.79
$16.79
$16.79 - $16.79
$16.79
In-Line Fuel Filter

In-Line Fuel Filter

$14.49 - $14.49
$14.49
$14.49 - $14.49
$14.49

In-Line Fuel Filter

$14.49 - $14.49
$14.49
$14.49 - $14.49
$14.49
Filter-Water Sep OMC 10M

Filter-Water Sep OMC 10M

$22.69 - $22.69
$22.69
$22.69 - $22.69
$22.69

Replacement OMC fuel water separating fuel filter.

$22.69 - $22.69
$22.69
$22.69 - $22.69
$22.69
Sierra 79914 Fuel/Water Separator Kit W/Collection Bowl

Sierra 79914 Fuel/Water Separator Kit W/Collection Bowl

$153.99 - $153.99
$153.99
$153.99 - $153.99
$153.99

Filters allow water to be drained from the filter to extend sevice life. AquaVue™ Clear Bowls: Use for outboard and above deck installations. Metal...

View full details
$153.99 - $153.99
$153.99
$153.99 - $153.99
$153.99
Replacement Water Separating Fuel Filter, Long

Replacement Water Separating Fuel Filter, Long

$16.49 - $16.49
$16.49
$16.49 - $16.49
$16.49

Replacement Water Separating Fuel Filter

$16.49 - $16.49
$16.49
$16.49 - $16.49
$16.49
Fuel Water Separator Assembly

Fuel Water Separator Assembly

$74.79 - $74.79
$74.79
$74.79 - $74.79
$74.79

Compact bracket and separator kit for outboards up to 115hp with 10 micron.

$74.79 - $74.79
$74.79
$74.79 - $74.79
$74.79
Yamaha Fuel filter

Yamaha Fuel filter

$57.69 - $57.69
$57.69
$57.69 - $57.69
$57.69

See Sierra catalog for complete application information.

$57.69 - $57.69
$57.69
$57.69 - $57.69
$57.69
Honda Fuel filter

Honda Fuel filter

$64.09 - $64.09
$64.09
$64.09 - $64.09
$64.09

See Sierra catalog for complete application information.

$64.09 - $64.09
$64.09
$64.09 - $64.09
$64.09
Sierra 79999 Suzuki Fuel Filter

Sierra 79999 Suzuki Fuel Filter

$97.79 - $97.79
$97.79
$97.79 - $97.79
$97.79

Fuel Filter

$97.79 - $97.79
$97.79
$97.79 - $97.79
$97.79
Replacement Fuel Filter, 10 Micron

Replacement Fuel Filter, 10 Micron

$46.49 - $46.49
$46.49
$46.49 - $46.49
$46.49

Replacement filter cannister w/o bowl.

$46.49 - $46.49
$46.49
$46.49 - $46.49
$46.49
Replacement Water Separating Fuel Filter, Short

Replacement Water Separating Fuel Filter, Short

$16.49 - $16.49
$16.49
$16.49 - $16.49
$16.49

Replacement Water Separating Fuel Filter

$16.49 - $16.49
$16.49
$16.49 - $16.49
$16.49
Sierra 79321 Fuel/Water Separator Kit W/Collection Bowl

Sierra 79321 Fuel/Water Separator Kit W/Collection Bowl

$171.59 - $171.59
$171.59
$171.59 - $171.59
$171.59

Filters allow water to be drained from the filter to extend sevice life. AquaVue™ Clear Bowls: Use for outboard and above deck installations. Metal...

View full details
$171.59 - $171.59
$171.59
$171.59 - $171.59
$171.59
Fuel / Water Separator Bonus Pack

Fuel / Water Separator Bonus Pack

$94.49 - $94.49
$94.49
$94.49 - $94.49
$94.49

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removin...

View full details
$94.49 - $94.49
$94.49
$94.49 - $94.49
$94.49
Sierra 7865 Fuel Filter, Yamaha MAR-MINIF-IL-TR

Sierra 7865 Fuel Filter, Yamaha MAR-MINIF-IL-TR

$28.59 - $28.59
$28.59
$28.59 - $28.59
$28.59

Spin-on fuel filter, Yamaha MAR-MINIF-IL-TR.Compact bracket and separator kit for outboards up to 115hp with 10 micron.

$28.59 - $28.59
$28.59
$28.59 - $28.59
$28.59
Replacement Fuel/Water Separator Filter

Replacement Fuel/Water Separator Filter

$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19

Replacement Fuel/Water Separator Filter

$19.19 - $19.19
$19.19
$19.19 - $19.19
$19.19
Fuel / Water Separator Kit

Fuel / Water Separator Kit

$83.99 - $83.99
$83.99
$83.99 - $83.99
$83.99

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removin...

View full details
$83.99 - $83.99
$83.99
$83.99 - $83.99
$83.99
Replacement Water Separating Fuel Filter, Lg

Replacement Water Separating Fuel Filter, Lg

$36.39 - $36.39
$36.39
$36.39 - $36.39
$36.39

Replacement Water Separating Fuel Filter

$36.39 - $36.39
$36.39
$36.39 - $36.39
$36.39
Fuel / Water Separator Kit

Fuel / Water Separator Kit

$147.49 - $147.49
$147.49
$147.49 - $147.49
$147.49

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removin...

View full details
$147.49 - $147.49
$147.49
$147.49 - $147.49
$147.49
Fuel Filter - OMC 173326

Fuel Filter - OMC 173326

$42.39 - $42.39
$42.39
$42.39 - $42.39
$42.39

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 details
$42.39 - $42.39
$42.39
$42.39 - $42.39
$42.39
Mercruiser/Suzuki Replacement Fuel Filter Element

Mercruiser/Suzuki Replacement Fuel Filter Element

$48.69 - $48.69
$48.69
$48.69 - $48.69
$48.69

Mercruiser/Suzuki Replacement Fuel Filter Element

$48.69 - $48.69
$48.69
$48.69 - $48.69
$48.69
Fuel / Water Separator Bonus Pack

Fuel / Water Separator Bonus Pack

$106.89 - $106.89
$106.89
$106.89 - $106.89
$106.89

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removin...

View full details
$106.89 - $106.89
$106.89
$106.89 - $106.89
$106.89
Sierra 79992 Suzuki Fuel Filter

Sierra 79992 Suzuki Fuel Filter

$135.19 - $135.19
$135.19
$135.19 - $135.19
$135.19

Fuel Filter

$135.19 - $135.19
$135.19
$135.19 - $135.19
$135.19
Fuel / Water Separator Kit

Fuel / Water Separator Kit

$82.99 - $82.99
$82.99
$82.99 - $82.99
$82.99

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removin...

View full details
$82.99 - $82.99
$82.99
$82.99 - $82.99
$82.99
In-Line Fuel Filter

In-Line Fuel Filter

$17.69 - $17.69
$17.69
$17.69 - $17.69
$17.69

In-Line Fuel Filter

$17.69 - $17.69
$17.69
$17.69 - $17.69
$17.69
Volvo/OMC Replacement Fuel Filter Element

Volvo/OMC Replacement Fuel Filter Element

$66.39 - $66.39
$66.39
$66.39 - $66.39
$66.39

Volvo/OMC Replacement Fuel Filter Element

$66.39 - $66.39
$66.39
$66.39 - $66.39
$66.39
In-Line Fuel Filter

In-Line Fuel Filter

$24.59 - $24.59
$24.59
$24.59 - $24.59
$24.59

In-Line Fuel Filter

$24.59 - $24.59
$24.59
$24.59 - $24.59
$24.59
Mercruiser/OMC Replacement Fuel Filter Element

Mercruiser/OMC Replacement Fuel Filter Element

$22.09 - $22.09
$22.09
$22.09 - $22.09
$22.09

Mercruiser/OMC Replacement Fuel Filter Element

$22.09 - $22.09
$22.09
$22.09 - $22.09
$22.09
Replacement Fuel/Water Separator Filter

Replacement Fuel/Water Separator Filter

$20.99 - $20.99
$20.99
$20.99 - $20.99
$20.99

Replacement Fuel/Water Separator Filter

$20.99 - $20.99
$20.99
$20.99 - $20.99
$20.99
Sierra Mercruiser Fuel Filter

Sierra Mercruiser Fuel Filter

$14.29 - $14.29
$14.29
$14.29 - $14.29
$14.29

Replacement Fuel Filter ElementRefer to the Sierra catalog for complete application information.

$14.29 - $14.29
$14.29
$14.29 - $14.29
$14.29
In-Line Fuel Filter

In-Line Fuel Filter

$32.99 - $32.99
$32.99
$32.99 - $32.99
$32.99

In-Line Fuel Filter

$32.99 - $32.99
$32.99
$32.99 - $32.99
$32.99
Fuel / Water Separator Kit

Fuel / Water Separator Kit

$92.69 - $92.69
$92.69
$92.69 - $92.69
$92.69

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. Sierra's 10 micron filters are over 90% efficient at removin...

View full details
$92.69 - $92.69
$92.69
$92.69 - $92.69
$92.69
In-Line Fuel Filter

In-Line Fuel Filter

$27.59 - $27.59
$27.59
$27.59 - $27.59
$27.59

In-Line Fuel Filter

$27.59 - $27.59
$27.59
$27.59 - $27.59
$27.59
Yamaha Replacement Fuel Filter Element

Yamaha Replacement Fuel Filter Element

$33.09 - $33.09
$33.09
$33.09 - $33.09
$33.09

Yamaha Replacement Fuel Filter Element

$33.09 - $33.09
$33.09
$33.09 - $33.09
$33.09