10w40 Synthetic Racing Oil 5 Quart Bottle

Lucas Oil 10W40 Synthetic Racing Oil in a 5-quart bottle is purpose-built for high-performance engines that demand superior protection under extreme heat and load. Whether you're running a naturally aspirated street engine, a turbocharged daily driver, or prepping for track duty, this synthetic formulation delivers the film strength and oxidation resistance required when engine temperatures spike and RPMs climb hard.

The 10W40 viscosity grade balances cold-start pumpability with hot-running durability, making it ideal for year-round use in modified or competition-oriented powerplants. This full synthetic formula employs advanced base stocks and anti-wear additives that maintain a robust oil film even when bearing clearances are tighter than factory specs or when ring gaps have been tightened for compression gains.

Enthusiasts running LS platforms, small-block Chevys, Ford Windsor engines, or any street or track machine benefit from the consistent protection this 5-quart bottle provides. The racing oil package resists shear and thermal breakdown better than conventional or semi-synthetic alternatives, preserving viscosity and protecting critical surfaces over extended drain intervals typical in performance applications.