About DOMINATOR 10W-40 Racing Oil
DOMINATOR 10W-40 synthetic racing oil for compatible racing engines with builder-specified lubrication needs. Competition and freshly built engines need a service plan tailored to their use. Discuss the oil choice, temperature range, and change interval with the engine builder.
Before you choose
Confirm the engine type, intended use, and required viscosity. Break-in oil and competition oils serve different jobs; follow the relevant service instructions.
Is this a routine street-car oil?
Do not assume so. Racing oils and break-in oils are application-specific selections. Follow the builder’s guidance and current AMSOIL product instructions for the intended engine and service period.
Product information reviewed September 7, 2026. Read AMSOIL’s current details.
