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0395127
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0779481
0779752
16277
16277A1
3851039
3852032
765730
765731
775610
775612
779481
779752
8M0072133
8M0072135
802880A1
802880Q1
802891A1
802891K2
802891Q1
802891Q2
850729A1
858074KC1
858074K01
858074Q01
90100A12
LUB-10W40-WV-12
OEM Mercury Premium Gear Lube
SAE 80W90 Marine Gearcase Lubricant
Mercury Premium Gear Lube 80W90 is engineered to protect marine lower units and sterndrives against wear, corrosion, foaming, and water contamination.
Mercury part number 858058K01 is designed for recreational marine applications requiring SAE 80W90 marine gear lubricant protection.
Compatible Applications
| Application | System Type | Use | Notes |
|---|---|---|---|
| Mercury Outboards | Lower Unit / Gearcase | Gear Lubrication | For compatible recreational outboard applications |
| Mercury Sterndrives | Sterndrive Lower Unit | Gear Lubrication | Compatible with many MerCruiser applications |
| Mariner Outboards | Gearcase | Gear Protection | Select compatible lower units |
| Marine Lower Units | Hypoid Gear Systems | Lubrication & Wear Protection | SAE 80W90 marine gear oil applications |
For racing, surfacing propeller, high-horsepower, or extreme-duty gearcase applications, Mercury also offers Extreme Performance 85W90 Gear Lube.
View Mercury Extreme Performance Gear Lube 85W90
OEM Part Numbers & Product Information
| Type | Details |
|---|---|
| Mercury Part Number | 858058K01 |
| Product Type | Premium Marine Gear Lube |
| Viscosity | SAE 80W90 |
| Container Size | 1 Quart |
| Brand | Mercury Marine |
What This Gear Lube is Used For
Mercury Premium Gear Lube is used to lubricate and protect marine lower units and sterndrives operating in freshwater and saltwater boating environments.
Marine gearcases operate under heavy load and elevated temperatures, making proper lubrication critical for protecting gears, bearings, shafts, and seals from wear and premature damage.
This SAE 80W90 marine lubricant helps reduce friction, resist foaming, minimize corrosion, and provide protection against water intrusion contamination.
Routine lower unit lubricant changes are an important part of preventive marine maintenance and help extend gearcase service life.
Key Features and Benefits
- OEM Mercury Premium Gear Lube
- SAE 80W90 marine gear lubricant
- Designed for Mercury outboards and sterndrives
- Helps protect gears and bearings against wear
- Excellent rust and corrosion protection
- Helps resist foaming and lubricant breakdown
- Provides protection against water contamination
- Ideal for recreational marine lower unit applications
Gear Lube Details
- Brand: Mercury Marine
- Part Number: 858058K01
- Product Type: Premium Marine Gear Lubricant
- Viscosity: SAE 80W90
- Container Size: 1 Quart
- Use: Lower Unit & Sterndrive Lubrication
- Applications: Mercury & Mariner Marine Gearcases
- Environment: Freshwater & Saltwater
FAQ
What is Mercury Premium Gear Lube used for?
This lubricant is used in marine lower units and sterndrives to protect gears, bearings, and internal gearcase components.
What viscosity is this gear lube?
This is SAE 80W90 marine gear lubricant.
When should Mercury Extreme Performance Gear Lube be used instead?
Mercury Extreme Performance Gear Lube is intended for racing, surfacing propeller, and high-performance gearcase applications operating under extreme load and temperature conditions.
Can this be used in saltwater applications?
Yes. Mercury Premium Gear Lube is formulated for both freshwater and saltwater marine environments.
When should lower unit lubricant be changed?
Mercury recommends regular lower unit service intervals as part of routine preventive maintenance.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Lubricants and chemicals must remain unopened and unused for return eligibility.
- Items must be in original packaging and resalable condition.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
858058K01, Mercury gear lube, Mercury Premium Gear Lube, Mercury 80W90, Mercury lower unit oil, Mercury marine gear oil, Mercury sterndrive gear lube, SAE 80W90 marine lubricant, Mercury outboard gear oil, Mercury lower unit lubricant, marine gearcase oil, Mercury gearcase lubricant, Mercury Extreme Performance Gear Lube, Mercury racing gear oil
19007A12
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7560112
802846A1
802846Q1
858058KC1
858058K01
858058QB1
858058QC1
858058Q01
883661A1
883672A1
9-82401
Mercury SAE 10W30 Full Synthetic Marine Engine Oil
Mercury 10W30 Full Synthetic 4-Stroke Marine Engine Oil
Mercury 8M0173224 SAE 10W30 Full Synthetic Marine Engine Oil is designed for customers wanting maximum protection for compatible non-catalyzed Mercury 4-stroke marine engines.
This advanced full synthetic marine oil formula delivers outstanding viscosity retention, corrosion protection, thermal stability, and engine wear protection across a broad range of marine operating conditions.
Compatible Applications
| Engine Type | Application | Oil Type |
|---|---|---|
| 4-Stroke Outboards | Compatible non-catalyzed Mercury outboards | SAE 10W30 Full Synthetic |
| Sterndrives | Compatible non-catalyzed Mercury sterndrive engines | SAE 10W30 Full Synthetic |
| Inboard Engines | Compatible non-catalyzed Mercury inboards | SAE 10W30 Full Synthetic |
Mercury SAE 10W30 Full Synthetic marine engine oil is intended for non-catalyzed 4-stroke marine engines.
Always verify the recommended oil viscosity and specification in your owner's manual before use.
Why Use Mercury Full Synthetic Marine Oil?
Mercury SAE 10W30 Full Synthetic marine engine oil is formulated to provide maximum protection for hard-working marine engines operating under heavy loads and harsh marine conditions.
Compared to Mercury 10W30 synthetic blend marine oil, this advanced full synthetic formula includes:
- 49% more anti-wear additives
- 45% more dispersants
- 24% more detergents
The result is outstanding protection against corrosion, sludge formation, varnish buildup, engine wear, and thermal breakdown.
Elevated ZDDP levels and Mercury's advanced multi-grade formulation help improve shear resistance and viscosity retention across a broad range of temperatures and marine operating conditions.
Key Features and Benefits
- Mercury SAE 10W30 Full Synthetic marine engine oil
- Designed for non-catalyzed 4-stroke marine engines
- Suitable for outboards, sterndrives, and inboards
- Advanced full synthetic marine oil formulation
- Outstanding viscosity retention for maximum engine protection
- Enhanced protection against engine wear and thermal breakdown
- Elevated zinc and phosphorous levels for anti-wear protection
- Helps reduce sludge and varnish buildup
- Excellent corrosion protection for marine environments
- Compatible with mineral and synthetic blend 10W30 formulas
- Safe upgrade path from conventional or synthetic blend oil
Oil Specifications
| Specification | Details |
|---|---|
| Part Number | 8M0173224 |
| Oil Type | Full Synthetic Marine Engine Oil |
| Viscosity | SAE 10W30 |
| Application | Non-Catalyzed 4-Stroke Marine Engines |
| Engine Types | Outboards, Sterndrives, and Inboards |
| Additive Package | Elevated ZDDP / Marine Anti-Wear Formula |
| Compatibility | Compatible with mineral and synthetic blend 10W30 oils |
What This Oil is Used For
Mercury SAE 10W30 Full Synthetic marine engine oil is designed for high-performance lubrication and protection of compatible non-catalyzed 4-stroke marine engines.
Marine engines operate under higher sustained loads and more demanding conditions than many automotive applications. This full synthetic formula is engineered to help maintain viscosity stability, corrosion protection, and wear resistance in harsh marine environments.
It is commonly used in compatible Mercury outboards, sterndrives, and inboard engines requiring SAE 10W30 marine oil.
FAQ
What engines can use Mercury SAE 10W30 Full Synthetic oil?
This oil is designed for compatible non-catalyzed 4-stroke outboards,
sterndrives, and inboard marine engines.
Is this oil full synthetic?
Yes. Mercury 8M0173224 is a full synthetic marine engine oil.
Can this oil be mixed with synthetic blend or conventional oil?
Yes. Mercury states this oil is compatible with mineral and synthetic blend
10W30 formulas for safe upgrading.
What makes this oil different from Mercury synthetic blend oil?
This full synthetic formula contains increased anti-wear additives,
dispersants, and detergents for improved engine protection and performance.
Does this oil help protect against corrosion?
Yes. This formula is specifically designed to help protect marine engines
against corrosion, thermal breakdown, sludge, and engine wear.
Should I verify viscosity before use?
Yes. Always verify the correct oil viscosity and specification
recommended by your engine manufacturer before use.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Items must be new and unopened in original packaging.
- Opened oil and lubricants may not be returnable.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0173224, Mercury 10W30 full synthetic oil, Mercury SAE 10W30 marine engine oil, Mercury full synthetic marine oil, Mercury 4-stroke marine oil, Mercury sterndrive oil, Mercury inboard engine oil, Mercury outboard oil, Mercury full synthetic 10W30, Mercury marine lubricant, Mercury engine oil, Mercury synthetic marine oil, SAE 10W30 marine oil, Mercury ZDDP marine oil, Mercury non-catalyzed engine oil
- Formulated to protect against corrosion and excessive wear
- Designed for use with all four-stroke marine engines when 10W-30 is recommended
- Offers outstanding strength and viscosity retention
- 1-gallon bottle
- Produced by Mercury Marine to Mercury's stringent original equipment manufacturer specifications
- Mercury oils, lubricants and engine care products are backed by decades of experience in engineering, testing and manufacturing to provide the best protection and performance.
- Formulated to protect against corrosion and excessive wear
- Designed for use with all four-stroke marine engines when 10W-30 is recommended
- Offers outstanding strength and viscosity retention
- 1-Quart bottle
- Produced by Mercury Marine to Mercury's stringent original equipment manufacturer specifications
- Mercury oils, lubricants and engine care products are backed by decades of experience in engineering, testing and manufacturing to provide the best protection and performance.