10w40 Semi Synthetic Racing Oil 1 Quart

Lucas Oil 10W40 Semi-Synthetic Racing Oil is designed for serious automotive enthusiasts and those with track-focused builds, where engine protection and sustained performance are crucial. This 1-quart container offers a premium oil blend that excels under high-RPM demands and extreme driving conditions, making it ideal for both street and track applications.

The 10W40 viscosity grade ensures reliable cold-start flow while maintaining robust film strength at operating temperatures. This semi-synthetic formulation incorporates advanced detergents and anti-wear additives, such as zinc and phosphorus, which cling to critical engine components, reduce sludge buildup, and resist viscosity breakdown under heat. This balance of synthetic durability and affordability is essential for high-performance engines.

Racing enthusiasts, engine builders, and performance mechanics prefer this oil for its compatibility with naturally aspirated and moderately boosted gasoline engines. It is particularly beneficial for modified engines during break-in cycles, as well as for builds featuring larger injectors and turbochargers, ensuring optimal performance and longevity.