Description
Maxima’s 10W40 synthetic formula is engineered for engines that demand consistent film strength across a wide temperature range—essential for both street and track applications where viscosity stability directly impacts bearing protection and ring sealing. The RS designation indicates a racing-grade additive package designed to resist oxidation and sludge formation during sustained high RPM operation. A single quart allows you to top off between full service intervals or maintain stock when precision fill levels matter.
- Viscosity: 10W40
- Type: Fully synthetic
- Size: 1 quart
- MPN: 39-16901S
- Grade: RS (racing)
- Application: Motor oil
- Packaging: Individual bottle









