The gear oil has very little, if any color. I use Lucas products in all my vehicles, (Harleys, SUV, and pickup). Outstanding product.

Lucas Oil 10791 Synthetic SAE 75W-140 V-Twin Gear Oil - 1 Quart

Lucas Oil 10791 Synthetic SAE 75W-140 V-Twin Gear Oil - 1 Quart

Q: anyone try this in their primary?

I have on my last 2 bikes. I like it.

Q: Do i use this for a Harley Sporster?

Yes, I prefer it over the oil harley uses in gear box. Thicker and smooths out shifts. IMO

Q: Can I use this in an open differential in my car? It calls for sae 75-140.

If it’s the same weight as what your car call for I would assume, or send a message to Lucas oil and they could clarify wether or not it’s recommended

Product ID: 13288239

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Details

Material
Blend
Brand
Lucas Oil
Package Information
Bottle
Liquid Volume
1 Quarts
Item Weight
16 Ounces

🔥High-temp stability for horsepower beasts

⚙️75W-140 viscosity for extreme protection

❄️Synthetic base oils for cool, quiet rides

Frequently Bought Together

Lucas Oil Synthetic SAE 75W-140 V-T, 1 quart, 10791

Lucas Oil 10790 Primary Chaincase Oil - 1 Quart

Lucas Oil 10702 High Performance Synthetic SAE 20W-50 Motorcycle Oil - 1 Quart (Pack of 6)

Description

⚙️ Ride cooler, shift smoother, and outlast the pack with Lucas Synthetic V-Twin Gear Oil!

SYNTHETIC POWER BLEND - Premium synthetic base oils combined with advanced additives for superior wear resistance and drag reduction.
QUIET SMOOTH OPERATION - Reduces gear noise and friction, delivering a cooler, quieter ride every time.
HIGH TEMPERATURE ENDURANCE - Maintains optimal viscosity and performance even under extreme heat and heavy loads.
ULTIMATE V TWIN PROTECTION - Specifically engineered for V-Twin motorcycles to handle intense torque and heat.
VERSATILE HIGH PERFORMANCE USE - Perfect not only for V-Twins but also any heavy-duty or high-performance transmission.

Lucas Oil 10791 Synthetic SAE 75W-140 V-Twin Gear Oil is a premium synthetic blend designed to provide superior protection and performance for V-Twin motorcycles and high-performance transmissions. It offers excellent thermal stability, reduces wear and drag, and ensures quiet, cool operation under high horsepower and temperature conditions.

Specifications

Material	Blend
Brand	Lucas Oil
Package Information	Bottle
Liquid Volume	1 Quarts
Item Weight	16 Ounces
Recommended Uses For Product	Automotive
Viscosity	75W-140
Specific Uses For Product	Motorcycle gearboxes, high-performance transmissions
Item Form	Oil
Global Trade Identification Number	00049807107918
Manufacturer	Lucas Oil
Unit Count	128.0 Fluid Ounces
UPC	172303161471 049807107918 049807407919
Number of Items	1
Model	10791
Item Weight	1 pounds
Product Dimensions	9 x 4.35 x 2.42 inches
Item model number	10791
Is Discontinued By Manufacturer	No
Manufacturer Part Number	LUCA10791
OEM Part Number	10791

Have a Question? See What Others Asked

anyone try this in their primary?

Do i use this for a Harley Sporster?

Can I use this in an open differential in my car? It calls for sae 75-140.

Is the oil red?

Reviews

M**I

Great oil for my Harley

Definitely like the quality of this oil in my 2024 Harley Road Glide Limited. Smoother shifting and temperature control.

4.07.2025

G**I

Good Stuff

This oil works so great I started buying it in 6 gallon boxes. Makes my Harley(s) run quieter than any other oil I've tried.

1.03.2025

M**Y

Recommended for well loved Harley’s

Item shipped and arrived quick. I started using gear oil when the mock said it was g2g. Anyways as soon as a winter hits, the condensation makes it smell like gear oil. I don’t think this will do that as bad. Installed with the Lucas primary oil and a clutch adjustment and my 50k 15 year old Harley feels like an old friend’s handshake. Why not use a specifically designed product? It only cost me 5 or 10 dollars across 7 quarts

26.03.2025

D**S

Harley oil

Good oil will use again

3.07.2025

M**S

Lucas products

I’ve used Lucas products in my Harley for years. Great products

18.09.2025

A**E

Harley Davison Road King 2002

Used this as gear box oil for Harley Road King 2002. I am very impressed. The shifts are very smooth and a lot easier than before. Can highly recommend.

25.05.2025

W**S

Quality oil! Excellent for HD transmission.

16.05.2025

T**S

Love it

As advertised

8.04.2025

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