10w40 Synthetic Oil 1 Quart RS1040

MAXIMA Racing Oils 10W40 Synthetic Oil in 1 Quart RS1040 formulation delivers premium engine protection engineered for high-performance and racing applications. This synthetic motor oil maintains viscosity stability across extreme temperature ranges, ensuring consistent lubrication whether engines operate under sustained high RPM conditions or cold-start scenarios. The RS designation indicates this oil meets MAXIMA's racing-grade standards for engines requiring robust anti-wear and anti-shear protection.

The 10W40 weight classification means the oil flows like a 10-weight oil in cold conditions, enabling reliable engine cranking and fast circulation to critical bearing surfaces during startup. At operating temperature, it maintains the body and protective film strength of a 40-weight, preventing excessive wear on cylinder walls, pistons, and valve train components. Synthetic base stock technology resists oxidation and thermal breakdown far longer than conventional mineral oils, extending oil change intervals and reducing deposit formation in combustion chambers and on piston crowns.

This 1-quart size serves as a top-up option for engines between scheduled oil changes or as a baseline quantity for smaller displacement engines and specialty applications. Buyers sourcing synthetic 10W40 motor oil for racing engines, motorcycles, ATVs, or high-revving automotive powerplants will find this MAXIMA formulation combines viscosity grade versatility with the thermal stability required in demanding service. The single-quart format provides convenience for testing oil compatibility before committing to larger quantities.