Engine Oil | Mercury Outboard

Z6_GHK6HJC0OG6S20Q8HU3K6R0G63

Error:

Javascript is disabled in this browser. This page requires Javascript. Modify your browser's settings to allow Javascript to execute. See your browser's documentation for specific instructions.

Z7_GHK6HJC0OG6S20Q8HU3K6R0GM5

0 Items

Z7_GHK6HJC0OG6S20Q8HU3K6R0GM7

Z7_GHK6HJC0OG6S20Q8HU3K6R0Q22

Home > Outboard > Mercury Outboard > Engine Oil | Mercury Outboard

|◀ ◀ 1 - 12 of 26 ▶ ▶|

View:

Engine Oil 10W30 Full Synthetic Quart

Mercury

Item#:

8M0173223

Cross Reference#:

8M0173223

Manufacturer Item:

8M0173223

Manufacturer:

Mercury Marine

Available:

In Stock

Your Price:

28.99

Each

Qty:

Engine Oil 10W30 MRX Race Gallon

Mercury MRX Racing Full Synthetic

Item#:

8M0169265

Cross Reference#:

8M0169265

Manufacturer Item:

8M0169265

Manufacturer:

Mercury Marine

Available:

Out of Stock

ETA:

06/05/2026

Your Price:

135.99

Each

Qty:

Synthetic Blend 25W40 Gallon

Mercury 4 Stroke Mercruiser

Item#:

8M0078630

Cross Reference#:

18-9440-4P
8M0051369
8M0061369
8M0061424
8M0078623
8M0078630
8M0078636
8M0078642
8401661
845282
8452821
857493A01
857493A1
857495A01
857495A1
858053KC1
858053K01
858053QC1
858053Q01
858056KC1
858056K01
858056QC1
858056Q01
858088KC1
858088K01
858088Q01
883723K01
883723Q01
883725K01
883725Q01

Manufacturer Item:

8M0078630

Manufacturer:

Mercury Marine

Available:

In Stock

Your Price:

70.99

Each

Qty:

Engine Oil, Gallon

Mercury 4-Stroke 10W30

Item#:

8M0078626

Cross Reference#:

0460787
0504080
0504081
0764364
0764365
0765720
0772733
0775594
0775597
0779434
18-9420-3
18-94203
764365
765720
779434
8M0078616
8M0078617
8M0078618
8M0078625
8M0078626
8M0078632
8M0078638
802833A1
802833A40
802833Q1
802833Q40
802835A1
802835A30
802835Q1
802835Q30
802836A1
802836A4
802836Q1
802836Q4
828000A40
828002A40
857391A01
857391A1
857471A1
858045K01
858045Q01
858046KC1
858046K01
858046QB1
858046QC1
858046Q01
858047KC1
858047K01
858047QC1
858047Q01
883696A01
883696A1
883697A1
9-82351

Manufacturer Item:

8M0078626

Manufacturer:

Mercury Marine

Available:

In Stock

Your Price:

55.99

Each

Qty:

Mercury Racing 2 Stroke Oil 8M0078011 1 Gallon

Synthetic Blend Racing Oil for High Performance 2 Stroke Engines

Mercury Racing 2 Stroke Oil 8M0078011

The Mercury Racing 2 Stroke Oil 8M0078011 is a high-performance synthetic blend 2-stroke marine engine oil designed for demanding racing and high-output applications. Sold in a 1 gallon container, this formula is built to protect against heat, wear, and carbon buildup while helping two-stroke engines run clean and strong.

Product Overview

This oil is made for high-performance 2-stroke engines where extra protection matters. Mercury Racing describes it as a low-smoke, ashless formula designed to maximize horsepower while helping reduce deposits and wear in extreme operating conditions. It is recommended for use in oil-injected or premix applications.

Applications

Application Type	Use
Marine Racing Engines	High performance 2-stroke outboard and marine racing applications
Premix Systems	Can be used in premix applications where racing 2-stroke oil is required
Oil Injection Systems	Can be used in compatible oil-injected 2-stroke engines
Other High Performance 2-Stroke Engines	Also recommended by Mercury Racing for certain air- or liquid-cooled 2-stroke powersports applications

Product Features

Synthetic blend high performance 2-stroke formula
Low-smoke, ashless chemistry
Helps protect against heat and wear
Helps reduce carbon buildup and deposit formation
Supports strong performance in high-load racing conditions
Works in premix or oil-injected applications

Specifications and Standards

Specification	Details
Part Number	8M0078011
Alternate OEM Format	92-8M0078011
Container Size	1 Gallon
Formula Type	Synthetic Blend 2-Stroke Oil
Standards	TC-W3, JASO FD, ISO EGD

What This Oil Is Used For

This oil is used to lubricate and protect high-performance 2-stroke engines operating under heavy load and high temperature conditions. It is a strong choice for customers running performance-oriented marine engines that need clean burn characteristics, reduced deposits, and dependable protection at high RPM. Mercury Racing states that the formula is intended to help maximize horsepower while controlling carbon buildup and wear.

FAQ

Is 8M0078011 a premix oil?
Yes. Mercury Racing says this oil can be used in premix applications as well as compatible oil-injected systems.

What type of oil is this?
It is a synthetic blend high performance 2-stroke marine engine oil made for racing and high-output 2-stroke applications.

What certifications does it meet?
Mercury Racing states that this oil exceeds TC-W3, JASO FD, and ISO EGD standards.

What size container is this?
This part number is sold as a 1 gallon container.

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.

Apply for a Dealer Account

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, unused, and in original packaging.
Return authorization is required before sending items back.

Need help with a return or order question?
Contact Us
Phone: 941-721-3000

Searchable Part Numbers

8M0078011, 92-8M0078011, Mercury Racing 2 Stroke Oil, Mercury synthetic blend racing oil, Quicksilver racing 2 stroke oil, 1 gallon 2 stroke racing oil

Item#:

8M0078011

Cross Reference#:

8M0078011
813743A2
858085K01
858101Q01
858102Q01
99493A2

Manufacturer Item:

8M0078011

Manufacturer:

Mercury Marine

Available:

In Stock

Your Price:

98.79

Each

Qty:

Mercury 25W-50 Verado & Racing Oil - 1 Gallon

OEM Mercury 25W50 Synthetic Blend Marine Engine Oil

OEM Mercury High-Performance Marine Engine Oil

Mercury SAE 25W50 Synthetic Blend Marine Engine Oil - 1 Gallon

Mercury 858084 is a premium SAE 25W50 synthetic blend 4-stroke marine engine oil designed for Mercury Verado, Mercury Racing, FormulaRace, and other high-performance marine engines where Mercury specifies 25W50 FC-W marine oil.

This gallon-size OEM Mercury marine oil provides outstanding wear protection, corrosion resistance, viscosity stability, and sludge protection for demanding marine applications and high-horsepower engines.

Recommended Applications

Engine Family	Application	Oil Specification	Notes
Mercury Verado	4-Stroke Outboards	SAE 25W50 FC-W	Use where Mercury specifies 25W50 oil
Mercury Racing	High-Performance Outboards	SAE 25W50 FC-W	Recommended for Racing 4-stroke applications
FormulaRace Engines	Performance Marine Engines	SAE 25W50 FC-W	OEM Mercury recommendation
Mercury Racing Sterndrives	525 EFI through 1650	SAE 25W50 FC-W	High-horsepower sterndrive applications

OEM Mercury Formula:

Mercury 25W50 marine engine oil is engineered specifically for high-load marine applications and is formulated to help protect against corrosion, varnish buildup, sludge formation, and viscosity breakdown in harsh marine environments.

This oil meets or exceeds FC-W marine oil requirements when SAE 25W50 oil is specified by Mercury Marine.

Important Application Note:

Always verify your owner's manual or service manual before ordering. Mercury uses multiple oil viscosities depending on engine family, horsepower range, operating temperature, and application.

This oil is specifically intended for applications where SAE 25W50 marine oil is required.

Available Oil Size Options

Oil Package	Product	Best For
1 Gallon Jug	Mercury Verado 25W50 Oil - 1 Gallon	Complete oil changes and multi-engine service
1 Quart Bottle	Mercury 25W50 Marine Oil - 1 Quart	Top-offs and adding exact oil quantities

Complete Your Service

What This Oil is Used For

Mercury 858084 SAE 25W50 marine engine oil is used in high-performance Mercury marine engines requiring FC-W rated 25W50 oil protection.

It is commonly used in Mercury Verado outboards, Mercury Racing outboards, FormulaRace engines, and Mercury Racing sterndrive applications.

Mercury formulated this oil specifically for marine operating conditions, including sustained RPM operation, moisture exposure, corrosion resistance, and high engine loads.

The gallon container is ideal for complete oil changes, multi-engine boats, dealer service departments, and customers maintaining larger Mercury outboards and sterndrive engines.

Key Features and Benefits

OEM Mercury Marine engine oil
SAE 25W50 synthetic blend formulation
Designed for high-performance marine engines
Recommended for Mercury Verado applications
Recommended for Mercury Racing outboards and sterndrives
Provides excellent wear and corrosion protection
Helps resist sludge and varnish buildup
Maintains viscosity under demanding operating conditions
Meets or exceeds FC-W marine oil requirements
1 gallon container size

Oil Details

Part Number: 858084
Oil Type: Synthetic Blend Marine Engine Oil
Viscosity: SAE 25W50
Certification: FC-W Marine Oil
Container Size: 1 Gallon
Brand: Mercury Marine
Application: High-Performance 4-Stroke Marine Engines

FAQ

Is this the correct oil for Mercury Verado engines?
Yes, this oil is commonly recommended for Mercury Verado outboards where Mercury specifies SAE 25W50 FC-W marine engine oil.

Is this a full synthetic oil?
No. Mercury 858084 is a synthetic blend marine engine oil.

Does this oil meet FC-W requirements?
Yes. This oil meets or exceeds marine engine manufacturer warranty requirements and recommendations for FC-W marine engine oil when SAE 25W50 is specified.

Can I use this in Mercury Racing applications?
Yes. Mercury specifically recommends this oil for many Mercury Racing four-stroke outboards and sterndrive engines.

How much oil does my engine require?
Oil capacity varies by engine model and application. Always check your owner's manual or service manual for exact oil quantity requirements.

Can I combine this gallon with quart bottles?
Yes. Many larger Mercury engines require additional quarts beyond a single gallon, so customers often combine gallon and quart containers for complete oil changes.