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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.

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.

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.

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.

Filters

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Filter Bracket-SS 1/4 NPT

Original price $165.99 - Original price $165.99
Original price
$165.99
$165.99 - $165.99
Current price $165.99

Replacement SS Filter Head, 1/4"

Original price $165.99 - Original price $165.99
Original price
$165.99
$165.99 - $165.99
Current price $165.99

Sierra / Marine Oil Filter GM Chevrolet Long Style / 47-78761

Original price $19.39 - Original price $19.39
Original price
$19.39
$19.39 - $19.39
Current price $19.39
Only 1 left!

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...

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Original price $19.39 - Original price $19.39
Original price
$19.39
$19.39 - $19.39
Current price $19.39

Sierra Marine Oil Filter — GM L4, L6 & V8 Short Style (47-78242)

Original price $19.79 - Original price $19.79
Original price
$19.79
$19.79 - $19.79
Current price $19.79
Only 1 left!

Marine Oil Filter for GM L4, L6 & V8 Engines — Short StyleThe Sierra 47-78242 is a short-style marine oil filter designed for GM-based L4, L6, ...

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Original price $19.79 - Original price $19.79
Original price
$19.79
$19.79 - $19.79
Current price $19.79

Sierra 94004 Oil-25W40 FCW I/O-I/B, 5 Qt.

Original price $88.49 - Original price $88.49
Original price
$88.49
$88.49 - $88.49
Current price $88.49

Formulated to provided excellent lubrication and corrosion protection. Developed for the marine environment and outperforms automotive engine oils ...

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Original price $88.49 - Original price $88.49
Original price
$88.49
$88.49 - $88.49
Current price $88.49

Sierra 94007 Oil-25W40 FCW I/O-I/B, 55 Gal. Drum

Original price $3,558.29 - Original price $3,558.29
Original price
$3,558.29
$3,558.29 - $3,558.29
Current price $3,558.29

Formulated to provided excellent lubrication and corrosion protection. Developed for the marine environment and outperforms automotive engine oils ...

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Original price $3,558.29 - Original price $3,558.29
Original price
$3,558.29
$3,558.29 - $3,558.29
Current price $3,558.29

CRC 75102 QD® Electronic Cleaner, 312 g, 12/case

Original price $15.29 - Original price $15.29
Original price
$15.29
$15.29 - $15.29
Current price $15.29

Instantly penetrates hard-to-reach areas to safely dissolve dirt and debris from sensitive electronic components. Cleans contacts, connectors and s...

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Original price $15.29 - Original price $15.29
Original price
$15.29
$15.29 - $15.29
Current price $15.29

Sierra 94002 Oil-25W40 FCW I/O-I/B, Qt.

Original price $21.99 - Original price $21.99
Original price
$21.99
$21.99 - $21.99
Current price $21.99

Formulated to provided excellent lubrication and corrosion protection. Developed for the marine environment and outperforms automotive engine oils ...

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Original price $21.99 - Original price $21.99
Original price
$21.99
$21.99 - $21.99
Current price $21.99

Panther DIY Series Oil Extractor

Original price $122.16 - Original price $122.16
Original price
$122.16
$122.16 - $122.16
Current price $122.16

These compact, powerful pumps make oil changes fast, efficient and cleaner than you ever thought possible. They take less than 10 seconds to prime ...

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Original price $122.16 - Original price $122.16
Original price
$122.16
$122.16 - $122.16
Current price $122.16

Panther DIY Series Oil Extractor

Original price $171.22 - Original price $171.22
Original price
$171.22
$171.22 - $171.22
Current price $171.22

These compact, powerful pumps make oil changes fast, efficient and cleaner than you ever thought possible. They take less than 10 seconds to prime ...

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Original price $171.22 - Original price $171.22
Original price
$171.22
$171.22 - $171.22
Current price $171.22

Fluid/Oil Extractor, 7.5 Qt.

Original price $122.39 - Original price $122.39
Original price
$122.39
$122.39 - $122.39
Current price $122.39

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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Original price $122.39 - Original price $122.39
Original price
$122.39
$122.39 - $122.39
Current price $122.39

Honda - Marine 10W-30 NMMA Oil - 08207-10W30FCW

Original price $0.00 - Original price $0.00
Original price $0.00
$18.85
$18.85 - $18.85
Current price $18.85
Only 1 left!

Honda Marine 10W-30 FC-W Engine Oil is formulated for Honda marine engines and approved to meet the NMMA FC-W marine oil standard. It is tested by ...

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Original price $0.00 - Original price $0.00
Original price $0.00
$18.85
$18.85 - $18.85
Current price $18.85

Volvo Penta Anti-Rust Agent 21234027

Original price $38.20 - Original price $38.20
Original price $38.20
$38.20
$38.20 - $38.20
Current price $38.20
in stock

Volvo Penta 21234027 is a genuine OEM anti-rust agent / corrosion shield for marine use. Current Volvo Penta and dealer listings identify part numb...

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Original price $38.20 - Original price $38.20
Original price $38.20
$38.20
$38.20 - $38.20
Current price $38.20

Volvo Penta Oil 21681796

Original price $391.00 - Original price $391.00
Original price $391.00
$391.00
$391.00 - $391.00
Current price $391.00
Only 4 left!

Volvo Penta 21681796 is a genuine Volvo Penta synthetic gasoline engine oil sold in a 5-gallon (20 liter) container. Current Volvo Penta parts-shop...

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Original price $391.00 - Original price $391.00
Original price $391.00
$391.00
$391.00 - $391.00
Current price $391.00

Volvo Penta Neutralizing Agent 21687793

Original price $35.00 - Original price $35.00
Original price $35.00
$35.00
$35.00 - $35.00
Current price $35.00
Only 4 left!

Volvo Penta 21687793 is a genuine OEM neutralizing agent / Neutra-Salt concentrate used for flushing selected Volvo Penta marine cooling systems. V...

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Original price $35.00 - Original price $35.00
Original price $35.00
$35.00
$35.00 - $35.00
Current price $35.00

Mercury 2-Cycle DFI Oil 8M0230194

Original price $91.33 - Original price $91.33
Original price $91.33
$91.33
$91.33 - $91.33
Current price $91.33
Only 5 left!

Mercury 8M0230194 is a genuine OEM 2-cycle DFI synthetic blend outboard oil for direct fuel injected Mercury and Mariner 2-stroke engines. Dealer l...

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Original price $91.33 - Original price $91.33
Original price $91.33
$91.33
$91.33 - $91.33
Current price $91.33

Volvo Penta VDS-4.5 15W-40 Diesel Engine Oil 5 Gallon – 23219264

Original price $260.00 - Original price $260.00
Original price $260.00
$260.00
$260.00 - $260.00
Current price $260.00
in stock

Volvo Penta 23219264 is a genuine OEM marine diesel engine oil identified as VDS-4.5 Engine Oil 15W-40. Public Volvo Penta and dealer listings desc...

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Original price $260.00 - Original price $260.00
Original price $260.00
$260.00
$260.00 - $260.00
Current price $260.00

Mercury 4-Stroke Oil 1L 8M0078637

Original price $18.97 - Original price $18.97
Original price $18.97
$18.97
$18.97 - $18.97
Current price $18.97
in stock

Mercury 4-Stroke Marine Engine Oil – 1L – 8M0078637 Protect your marine engine with Mercury 4-Stroke Marine Engine Oil 8M0078637. This genuine Merc...

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Original price $18.97 - Original price $18.97
Original price $18.97
$18.97
$18.97 - $18.97
Current price $18.97

Mercury 4-Stroke Oil 4L 8M0078638

Original price $65.47 - Original price $65.47
Original price $65.47
$65.47
$65.47 - $65.47
Current price $65.47
Only 5 left!

Mercury 4-Stroke Marine Engine Oil – 4L – 8M0078638 Protect your marine engine with Mercury 4-Stroke Marine Engine Oil 8M0078638. This genuine Merc...

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Original price $65.47 - Original price $65.47
Original price $65.47
$65.47
$65.47 - $65.47
Current price $65.47

Mercury 4-Stroke Oil 4L 8M0078640

Original price $65.47 - Original price $65.47
Original price $65.47
$65.47
$65.47 - $65.47
Current price $65.47
Only 2 left!

Mercury 4-Stroke Marine Engine Oil – 4L – 8M0078640 Protect your marine engine with Mercury 4-Stroke Marine Engine Oil 8M0078640. This genuine Merc...

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Original price $65.47 - Original price $65.47
Original price $65.47
$65.47
$65.47 - $65.47
Current price $65.47

Mercury 4-Stroke Synthetic Blend Marine Oil 10W-30 1 Gallon 8M0149213

Original price $69.08 - Original price $69.08
Original price $69.08
$69.08
$69.08 - $69.08
Current price $69.08
Only 4 left!

Mercury 8M0149213 is a genuine OEM 10W-30 4-stroke synthetic blend marine engine oil in a 1-gallon package. Current Mercury product information des...

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Original price $69.08 - Original price $69.08
Original price $69.08
$69.08
$69.08 - $69.08
Current price $69.08

Sierra 25W-40 4-Stroke Marine Engine Oil - 1 Quart

Original price $21.74 - Original price $21.74
Original price $21.74
$21.74
$21.74 - $21.74
Current price $21.74
Only 1 left!

Sierra premium 25W-40 4-stroke marine engine oil engineered for superior protection and performance in marine gasoline engines. This high-quality o...

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Original price $21.74 - Original price $21.74
Original price $21.74
$21.74
$21.74 - $21.74
Current price $21.74

Yanmar 15W-40 Marine Engine Oil - 1 Gallon OEM Lubricant

Original price $69.76 - Original price $69.76
Original price $69.76
$69.76
$69.76 - $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

Yanmar Y-Spec Synthetic Engine Oil 50540 - 1 Quart Marine Diesel

Original price $12.79 - Original price $12.79
Original price $12.79
$12.79
$12.79 - $12.79
Current price $12.79
in stock

Genuine Yanmar Y-Spec Synthetic Engine Oil - Professional Marine Lubricant OEM synthetic engine oil formulated specifically for Yanmar marine diese...

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Original price $12.79 - Original price $12.79
Original price $12.79
$12.79
$12.79 - $12.79
Current price $12.79

Volvo Penta Oil 218 - OEM Marine Engine Oil

Original price $80.00 - Original price $80.00
Original price $80.00
$80.00
$80.00 - $80.00
Current price $80.00
in stock

Genuine Volvo Penta marine engine oil (Part #218) formulated specifically for marine engine applications. This OEM lubricant provides superior prot...

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Original price $80.00 - Original price $80.00
Original price $80.00
$80.00
$80.00 - $80.00
Current price $80.00

Volvo Penta Oil 217 - OEM Marine Engine Oil

Original price $21.70 - Original price $21.70
Original price $21.70
$21.70
$21.70 - $21.70
Current price $21.70
in stock

Genuine Volvo Penta oil (Part #217) specially formulated for marine engine lubrication and protection. This OEM lubricant provides superior wear pr...

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Original price $21.70 - Original price $21.70
Original price $21.70
$21.70
$21.70 - $21.70
Current price $21.70

Mercury Synthetic Blend Engine Oil 10W-30 8M0149203

Original price $18.89 - Original price $18.89
Original price $18.89
$18.89
$18.89 - $18.89
Current price $18.89
in stock

Mercury 8M0149203 is a genuine Mercury Marine SAE 10W-30 synthetic blend 4-stroke marine engine oil. Retail and dealer listings identify this part ...

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Original price $18.89 - Original price $18.89
Original price $18.89
$18.89
$18.89 - $18.89
Current price $18.89

Mercury 4-Stroke Engine Oil 1L 8M0078639

Original price $16.91 - Original price $16.91
Original price $16.91
$16.91
$16.91 - $16.91
Current price $16.91
in stock

Mercury 4-Stroke Marine Engine Oil – 1L – 8M0078639 Protect your marine engine with Mercury 4-Stroke Marine Engine Oil 8M0078639. This genuine Merc...

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Original price $16.91 - Original price $16.91
Original price $16.91
$16.91
$16.91 - $16.91
Current price $16.91

Mercury 4-Stroke High Performance Oil Quart 8M0078013

Original price $31.41 - Original price $31.41
Original price $31.41
$31.41
$31.41 - $31.41
Current price $31.41
in stock

Mercury 4-Stroke High Performance Engine Oil – Quart – 8M0078013 Protect high-output marine engines with Mercury 4-Stroke High Performance Engine O...

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Original price $31.41 - Original price $31.41
Original price $31.41
$31.41
$31.41 - $31.41
Current price $31.41

Volvo Penta Diesel Engine Oil VDS-4.5 SAE 5W-40 1L 23219282

Original price $15.50 - Original price $15.50
Original price $15.50
$15.50
$15.50 - $15.50
Current price $15.50
in stock

V Volvo Penta 23219282 is a genuine OEM diesel engine oil in a 4 litre container. The product label identifies it as VDS-4.5 SAE 5W-40 and API CK-4...

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Original price $15.50 - Original price $15.50
Original price $15.50
$15.50
$15.50 - $15.50
Current price $15.50

Volvo Penta Engine Oil 23219274 - Premium Marine Lubricant

Original price $54.60 - Original price $54.60
Original price $54.60
$54.60
$54.60 - $54.60
Current price $54.60
in stock

Genuine Volvo Penta engine oil engineered specifically for marine diesel and gasoline engines. This premium lubricant delivers superior protection ...

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Original price $54.60 - Original price $54.60
Original price $54.60
$54.60
$54.60 - $54.60
Current price $54.60

Mercury MerCruiser Synthetic 10W-30 Oil 1L 8M0142141

Original price $29.84 - Original price $29.84
Original price $29.84
$29.84
$29.84 - $29.84
Current price $29.84
in stock

Maintain proper lubrication and engine protection with the Mercury MerCruiser Synthetic 10W-30 Oil 1L 8M0142141. This genuine Mercury Marine OEM sy...

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Original price $29.84 - Original price $29.84
Original price $29.84
$29.84
$29.84 - $29.84
Current price $29.84

Mercruiser 4-Stroke Synthetic Oil 4L - OEM Part 8M0078642

Original price $84.91 - Original price $84.91
Original price $84.91
$84.91
$84.91 - $84.91
Current price $84.91
in stock

Mercury 8M0078642 is a genuine OEM 4-stroke synthetic blend marine engine oil in a 4-litre container. Dealer listings identify it as OIL 4S SYN4L, ...

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Original price $84.91 - Original price $84.91
Original price $84.91
$84.91
$84.91 - $84.91
Current price $84.91

Mercruiser 4-Stroke Synthetic Oil 1L - OEM Part 8M0078641

Original price $27.60 - Original price $27.60
Original price $27.60
$27.60
$27.60 - $27.60
Current price $27.60
in stock

Genuine Mercruiser OEM 4-stroke synthetic engine oil engineered for superior protection and performance in marine applications. This premium synthe...

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Original price $27.60 - Original price $27.60
Original price $27.60
$27.60
$27.60 - $27.60
Current price $27.60

Mercruiser High Performance Gear Lube 8M0222063

Original price $0.00 - Original price $0.00
Original price $0.00
$25.66
$25.66 - $25.66
Current price $25.66
in stock

Mercury 8M0222063 is a genuine OEM SAE 90 High Performance Gear Lube for marine gearcases. It is formulated for outboard lower units, jet pumps, sp...

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Original price $0.00 - Original price $0.00
Original price $0.00
$25.66
$25.66 - $25.66
Current price $25.66

Mercury Premium Plus TC-W3 2-Stroke Oil 32 oz 858026KC1

Original price $27.39 - Original price $27.39
Original price $27.39
$27.39
$27.39 - $27.39
Current price $27.39
in stock

Mercury 858026KC1 is a genuine OEM Premium Plus TC-W3 2-stroke marine engine oil in a 32 oz / 1 quart / 1 liter package. Mercury's current product ...

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Original price $27.39 - Original price $27.39
Original price $27.39
$27.39
$27.39 - $27.39
Current price $27.39

Synthetic 75W90 Gear Oil - Marine Transmission & Lower Unit Oil

Original price $24.92 - Original price $24.92
Original price $24.92
$24.92
$24.92 - $24.92
Current price $24.92
Only 1 left!

Premium Synthetic 75W90 Gear OilHigh-performance synthetic gear oil specifically formulated for marine lower units, stern drives, and transmissions...

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Original price $24.92 - Original price $24.92
Original price $24.92
$24.92
$24.92 - $24.92
Current price $24.92

Synthetic 15W40 Diesel/Marine Engine Oil - 1 Gallon

Original price $362.00 - 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

Synthetic 15W40 Marine Diesel Engine Oil AMEQTC

Original price $0.00 - Original price $0.00
Original price $0.00
$24.29
$24.29 - $24.29
Current price $24.29
in stock

AMEQTC is a synthetic 15W-40 heavy-duty diesel and marine engine oil designed for demanding diesel applications. AMSOIL describes this oil as suita...

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Original price $0.00 - Original price $0.00
Original price $0.00
$24.29
$24.29 - $24.29
Current price $24.29

Outboard Two-Cycle Oil - Premium 2-Stroke Engine Oil

Original price $22.85 - Original price $22.85
Original price $22.85
$22.85
$22.85 - $22.85
Current price $22.85
Only 2 left!

Premium Outboard Two-Cycle Engine Oil High-quality 2-stroke oil formulated specifically for outboard marine engines. This premium two-cycle oil pro...

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Original price $22.85 - Original price $22.85
Original price $22.85
$22.85
$22.85 - $22.85
Current price $22.85

AMSOIL Dominator 2-Cycle Racing Oil - Quart

Original price $21.29 - Original price $21.29
Original price $21.29
$21.39
$21.39 - $21.39
Current price $21.39
Only 2 left!

AMSOIL Dominator 2-Cycle Racing OilPremium synthetic 2-stroke racing oil engineered for maximum performance in high-RPM marine engines. AMSOIL Domi...

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Original price $21.29 - Original price $21.29
Original price $21.29
$21.39
$21.39 - $21.39
Current price $21.39