75w140 Synthetic Gear Oil 1 Qt

Lucas Oil 75w140 Synthetic Gear Oil in a 1 Qt bottle is engineered for vehicles and equipment demanding superior lubrication under extreme pressure conditions. This product is specifically formulated for limited-slip differentials and manual transmissions where traditional mineral oils fall short, making it the choice for operators who need reliable protection in high-load, high-temperature environments. Whether you're maintaining heavy-duty trucks, performance vehicles, or industrial machinery, this synthetic formulation delivers the durability and thermal stability that mission-critical applications require.

The 75W140 viscosity rating indicates exceptional flow at cold temperatures (75W rating) combined with heavy-duty protection at operating temperatures (140 grade), a combination essential for gears subjected to shock loads and sustained high pressures. Lucas Oil's synthetic base stock resists breakdown far longer than conventional mineral oils, extending drain intervals and reducing maintenance costs over the vehicle's service life. The integrated limited-slip additive package ensures smooth clutch engagement in positraction differentials while preventing gear chatter and wear, critical for maintaining driveline integrity in both on-road and off-road conditions.

Technicians and fleet managers benefit most from this product when servicing vehicles with factory limited-slip or locking differentials, manual five- and six-speed transmissions, and transfer cases in four-wheel-drive systems. The 1 Qt size makes it ideal for topping off, partial fluid changes, or emergency field replenishment without requiring large bulk purchases. Verify your vehicle's or equipment's factory specification before use, as some manufacturers recommend specific friction modifier profiles; however, the robust additive system in Lucas Oil 75w140 Synthetic Gear Oil meets or exceeds most OEM requirements for high-performance gear protection.