GL-4 80w90 Gear Oil Case 12 x 1 Quart

The GL-4 80W90 Gear Oil Case 12 x 1 Quart by DRIVEN RACING OIL is purpose-built for serious vehicle enthusiasts and mechanics who demand reliable differential and transmission lubrication in high-performance or modified drivetrains. This case format—twelve individual quart bottles—makes it ideal for shops, fleet maintenance, or hobbyists running multiple modified vehicles that require frequent oil changes or top-offs. Whether you're maintaining a freshly built differential, servicing a street-driven manual transmission, or supporting a weekend track car, having a full case on hand eliminates supply interruptions and ensures consistent protection across your fleet.

GL-4 rated gear oils meet stringent anti-scuff and load-carrying requirements essential for hypoid differentials and synchronized manual gearboxes operating under shock loads and sustained pressure. The 80W90 viscosity grade flows reliably in cold startup conditions while maintaining a robust protective film at elevated operating temperatures—critical in modified engines or aggressive driving scenarios where gear mesh temperatures spike. DRIVEN RACING OIL's formulation incorporates anti-wear additives, oxidation inhibitors, and friction modifiers that extend drain intervals and reduce wear on bearing surfaces, ring gears, and synchro rings, even under sustained high-rpm operation or towing loads typical of performance builds.

Mechanics and enthusiasts favor DRIVEN RACING OIL's GL-4 formulation for classic hot rods, daily-driven manual transmissions, solid-axle differentials, and any drivetrain where OEM or aftermarket limited-slip differentials demand premium friction stability. The twelve-quart case reduces per-unit cost compared to individual bottles, making it economical for service departments or dedicated gear-heads performing regular maintenance on multiple vehicles. Always verify your specific differential or transmission's requirements—some modern limited-slip units and transfer cases may specify GL-5 or synthetic variants—but this GL-4 80W90 remains the trusted choice for traditional hypoid gears and standard synchronized boxes across decades of proven automotive use.