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 Gear Oil - 1 Quart

Product ID: 228256359

Details

Brand
Lucas Oil
Item Weight
16 Ounces
Liquid Volume
1 Quarts
Package Information
Bottle
Recommended Uses For Product
Automotive

🔥High-temp endurance - stands up to heat

⚙️75W-140 Viscosity - optimal gear protection

🏍️Specifically tuned for V-Twin & high-performance transmissions

€ 124.37

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Gear up with Lucas Oil – where power meets precision!

V TWIN SPECIALIST - Tailored for motorcycle gearboxes, especially V-Twins, delivering unmatched transmission reliability.
ONE QUART POWER PACK - Compact 1-quart bottle designed for easy handling and precise application.
COOL QUIET OPERATION - Minimizes wear and drag, ensuring your ride stays smooth and whisper-quiet under pressure.
HIGH PERFORMANCE READY - Formulated to withstand extreme horsepower and elevated temperatures without breaking down.
PRECISION SYNTHETIC BLEND - Engineered with premium synthetic base oils for superior lubrication and longevity.

Lucas Oil 10791 Gear Oil is a high-quality synthetic blend designed for motorcycle gearboxes and high-performance transmissions. With a 75W-140 viscosity rating, it provides excellent protection against wear, reduces drag, and withstands high temperatures and horsepower, making it ideal for V-Twin engines and demanding riding conditions.

Specifications

ASIN	B0068C4S20
Best Sellers Rank	#496,318 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #453 in Gear & Transmission Fluids
Brand Name	Lucas Oil
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (512)
Global Trade Identification Number	00049807107918
Included Components	1x 1 Quart Bottle
Item Form	Oil
Item Type Name	gear oil
Item Weight	16 Ounces
Liquid Volume	1 Quarts
Manufacturer	Lucas Oil
Model Number	10791
Number of Items	1
Number of Packs	1
Part Number	LUCA10791
Recommended Uses For Product	Automotive
Specific Uses For Product	Motorcycle gearboxes, high-performance transmissions
UPC	049807407919
Unit Count	6096.0 Milliliters
Viscosity	75 W - 140

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