GEAR OIL

M8 Synthetic SAE 75W-90 Marine Gear Oil

Marine Gear Oil Synthetic SAE 75W-90 M8

Lucas M8 Synthetic SAE 75W-90 Marine Gear Oil is a pure synthetic, non foaming, super slick, long lasting lubricant designed especially for marine applications. Originally designed for high powered off shore racing boats, M8 Marine Gear Oil contains seal conditioners and an exclusive blend of synthetic additives that protect from rust and wear caused by both fresh water and salt water during long periods of storage.

Excellent for use in any heavy duty / high performance stern drives, v-drives, gear boxes, wheel bearings and superchargers.

Key Benefits

Fortified with anti-foaming agents to prevent cavitation at high RPM's
Safely blends with all other known gear oils and additives
Protects against rust and moisture during long periods of storage
Provides rust and corrosion protection in both fresh water and salt water environments
Effective Water Resistance
Long Lasting
Resist Extreme Pressure
Extreme Friction Reducer

Packaging

Product #	Size	Weight	SDS
#10652	1 Quart (Case of 6)	13 lbs

Download Product Files

Documentation

→ PRODUCT DATA SHEET

MEDIA

360 VIEW

view the 360

PRODUCT VIEW

Marine Gear Oil Synthetic SAE 75W-90 M8 quart

PRODUCT LABEL

Marine Gear Oil Synthetic SAE 75W-90 M8 label

PRODUCT FLYER

Marine Gear Oil SAE 80W-90, Synthetic SAE 75W-90 M8 flyer

HEAR IT FROM OUR CUSTOMERS

I would rate them a 10 out of 10

I use Lucas lubricants in all my equipment from diesel, gas and 2 cycle. I have never had any issues and my equipment runs and starts lime day one. Lucas is a great product and I would rate them a 10 out of 10 for a quality of product.

Lucas hi-mileage stabilizer IMMEDIATELY quieted engine

2003 F150 5.4L Triton 3-valve. Timing chain, guides and cover had disintegrated at about 280,000 and constant oil leakage. Put new chain, guides, oil strainer, pick-up tube etc and drove to 345,000 using 20w50 and losing about 2 quarts a month. Noisy upon start-up which I understand is typical for these Tritons plus lifters made constant noise. Was about to install a new/used motor when I figured what the heck try a bottle of Lucas hi-mileage stabilizer. IMMEDIATELY quieted engine and after adding another bottle a week later, engine is running QUIETLY!!! leaks less too. Have installed new coil packs and I think this 5.4 might just make it to 500,000!! I also added 1qt to the tranny...shifts smoother.

I Added The Lucas Oil Stabilizer and There Was an Immediate Result.

I have always had a loud top end on my Harley Sportster. And ever since I started using this oil [Lucas 20w50 Motorcycle Oil], my engine is quieter and have noticed much better my motorcycle is running overall. I added the Lucas oil stabilizer yesterday and there was an immediate result. I LOVE Lucas products and as a motorcycle mechanic for Harley Davidson, I tell everyone I know with Harley’s to use this oil. -

Megan S., Orlando, FL

Nothing other than Lucas Oil products comes through the door of this shop EVER

I own a auto repair shop in Milton Ontario Canada and i use NOTHING but Lucas Oil products in my customers vehicles as well as my own vehicles. I have saved my customers tons of gas and their vehicles run pristine with the Lucas Oil products I use in there vehicles. Nothing other than Lucas Oil products comes through the door of this shop EVER.

Darrin H., Cambridge, MT

It was like riding a completely different bike.

I have a 2008 Harley Dyna Street Bob which has been completely customized to include engine work, custom exhaust and multiple dyno tuned sessions. The motor has 31k miles on it. The engine has always run extremely hot and destroys any oil thats in it in less than 2000 miles. This past weekend, I decided to switch over and try Lucas Oil and added 6 oz of Motorcycle Oil Stabilizer to the fresh oil. The bike is extremely quieter now (always had a sewing machine noise) and runs significantly cooler. It was like riding a completely different bike. I am sold. This stuff rocks.

Daniel F.

RELATED NEWS

READ MORE NEWS

Lucas Oil Named a 2026 Community Impact Winner by Culture of Good, Inc.

May 27, 2026

Lucas Oil Named a 2026 Community Impact Winner by Culture of Good, Inc.

Lucas Oil Expands RCR Partnership in 2026, Returns as Primary Sponsor of Kyle Busch’s No. 8 Chevrolet

May 11, 2026

Lucas Oil Expands RCR Partnership in 2026, Returns as Primary Sponsor of Kyle Busch’s No. 8 Chevrolet

CHASE MATTHEW + LUCAS OIL EXTEND PARTNERSHIP THROUGH 2027, POWERING GLOBAL EXPANSION

April 1, 2026

CHASE MATTHEW + LUCAS OIL EXTEND PARTNERSHIP THROUGH 2027, POWERING GLOBAL EXPANSION