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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Description

⚙️ Ride smoother, last longer — gear oil that works as hard as you do!

V TWIN OPTIMIZED - Specifically formulated for V-Twin motorcycles but versatile enough for any heavy-duty transmission.
PERFECT 1 QUART SIZE - Ideal volume for quick, efficient maintenance without waste.
COOL QUIET OPERATION - Minimizes wear and drag to keep your ride smooth and whisper-quiet.
PREMIUM SYNTHETIC BLEND - Engineered with top-tier synthetic base oils for unmatched gear protection.
HIGH PERFORMANCE DURABILITY - Built to withstand extreme horsepower and elevated temperatures without breaking down.

Lucas Oil 10791 Gear Oil is a 1-quart synthetic SAE 75W-140 lubricant designed for V-Twin motorcycles and high-performance transmissions. It delivers superior cooling, noise reduction, and wear protection under high horsepower and temperature conditions, ensuring your drivetrain performs quietly and efficiently.

Specifications

Brand	Lucas Oil
Package Information	Bottle
Liquid Volume	1 Quarts
Item Weight	16 Ounces
Recommended Uses For Product	Automotive
Viscosity	75 W - 140
Specific Uses For Product	Motorcycle gearboxes, high-performance transmissions
Item Form	Oil
Global Trade Identification Number	00049807107918
Manufacturer	Lucas Oil
Net Quantity	6096.0 millilitre
UPC	172303161471 049807107918 049807407919
Number of Items	1
Model number	10791
Colour	Multi-Colored
Item Weight	453 g
Product Dimensions	22.86 x 11.05 x 6.15 cm; 453.59 g
Item model number	10791
Item Height	2.42 Inches
Item Width	4.35 Inches
Power Source	Ac
Included Components	1x 1 Quart Bottle
Are batteries included?	No

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