Attention Red Line Oil customers: Please be advised that we are not accepting walk-in customers at our Benicia office at this time due to COVID-19. You may place an order at or call us at (707) 745-6100. All orders will be shipped to your requested address at our standard shipping rate. We apologize for the inconvenience and hope to open our doors again to you in the near future. Thank you for supporting Red Line Oil, we appreciate your business.

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Gear Oil for Differentials

Gear Oil for Differentials

These products contain the extreme pressure additives necessary for ultimate protection road cars and racing vehicles, as well as friction modifiers (except NS) for proper limited-slip operation

75W85 GL-5 Gear Oil

Fuel efficient gear oil with friction modifier, used in Toyota, Lexus, and more.

75W90 GL-5 Gear Oil

The go-to gear oil for most differentials.

75W110 GL-5 Gear Oil

A favorite of track day gurus, intermediate viscosity for consistent LSD operation.

75W140 GL-5 Gear Oil

Deals with high temps like no other gear oil. Popular for F-150, too.

80W140 GL-5 Gear Oil

An old-school viscosity that still out-protects the competition.

75W140NS GL-5 Gear Oil

Big protection but not slippery, for certain trans and diff applications.

Heavy ShockProof®

Top Fuel Dragsters use it. You might be a candidate, too.

Limited-Slip Friction Modifier

Chatter in your differential? An ounce or two of additional slipperiness might fix it.

80W250 GL-5 Gear Oil

The newest addition to our GL-5 family!

UTV/ATV Gearcase Oil

Famed Red Line gear protection, but specifically for your Side-by-Side.