The Lucas Oil 10045 SAE 85W-140 Plus H/D Gear Oil is a high-quality, premium grade gear oil designed for heavy-duty use. With a viscosity of 85W-140, it provides optimal lubrication and protection for gears and differentials in a wide range of vehicles. The 1-gallon size makes it convenient for use in both small and large vehicles, while the brand reputation of Lucas Oil ensures reliability and performance.