GP-1 Conventional 85W140 Gear Oil 1 Quart

DRIVEN RACING OIL GP-1 Conventional 85W140 Gear Oil in a 1 quart bottle is engineered for drivers and technicians who demand reliable differential and transmission protection in high-performance and heavy-duty applications. This conventional gear oil formula provides essential lubrication for ring-and-pinion gears, limited-slip differentials, and manual transmissions where robust film strength and thermal stability are non-negotiable. Whether you're servicing a street machine, weekend racer, or work vehicle, this gear oil delivers consistent performance across demanding operating conditions.

The 85W140 viscosity rating indicates excellent cold-flow characteristics paired with a heavy, protective film at operating temperature—critical for gear mesh protection and shock absorption. Conventional mineral-based formulations like this provide cost-effective protection with proven additive packages designed to resist breakdown under the extreme pressures generated by gear teeth. The 1 quart container offers convenient single-fill capacity for smaller reservoirs or partial service intervals, making it ideal for targeted maintenance without excess inventory. Thermal stability and anti-wear properties ensure long service intervals and reliable performance in both street and competition environments.

Technicians and enthusiasts benefit most from this formulation when servicing limited-slip and standard open differentials, as well as manual five- and six-speed transmissions requiring heavier viscosity gear oils. OEM specification compliance—typically GM, Ford, and aftermarket rear-end manufacturers—makes this selection ideal for both factory-stock and modified drivetrains. The compact quart bottle fits easily in work bays and garages, and the straightforward conventional chemistry integrates seamlessly with existing gear oil service practices. Always verify your specific vehicle's differential or transmission manual for viscosity and additive requirements before application.