Semi-Synthetic Trans Fluid 1 Qt

Lucas Oil Semi-Synthetic Trans Fluid in 1 Qt bottles is engineered for drivers and mechanics who demand reliable automatic transmission performance without the premium cost of full synthetic formulations. This transmission fluid addresses the core challenge every vehicle owner faces: protecting gear synchronization, hydraulic pressure delivery, and friction modulation in transmissions that operate under extreme heat and shear forces. Whether you're performing routine maintenance on a daily driver, rebuilding a transmission, or topping off fluid levels after a long season, this semi-synthetic ATF provides the chemical stability and lubrication film strength modern transmissions require.

The semi-synthetic blend technology combines mineral base stocks with synthetic compounds to deliver superior oxidation resistance and thermal stability compared to conventional fluids, reducing varnish formation and sludge buildup that compromise shift quality and torque converter efficiency. Lucas Oil's Sure Shift formulation includes proprietary friction modifiers and anti-wear additives that maintain consistent clutch pack engagement across temperature swings—critical for preventing harsh shifts, slippage, and premature wear on planetary gears and seals. The fluid's pour-point depression keeps it flowing smoothly in cold starts, while its high viscosity index ensures film strength persists under highway driving loads and towing conditions where transmission temperatures regularly exceed 200°F.

Mechanics and transmission specialists specify Lucas Oil Semi-Synthetic Trans Fluid for nearly all automatic transmission types—from compact cars and trucks to performance vehicles requiring steady hydraulic control. The 1 Qt bottle format suits top-off service intervals between major drain-and-fills, allowing you to maintain proper fluid level without overstocking inventory. Compatible with most OEM ATF specifications, this semi-synthetic formula extends drain intervals compared to conventional oils, reducing service frequency while improving transmission longevity and shift response. Store the bottle in a cool, dry location away from direct sunlight to preserve additive chemistry and maintain performance characteristics between applications.