anyone try this in their primary?

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

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

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

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

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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

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

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

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