What is the difference between your API-licensed motor oils and your racing oils?

How will running your product affect my oil temperature?
August 17, 2018
My retailer doesn’t carry XPR – why can’t they order it?
August 17, 2018

Royal Purple API-licensed motor oils are formulated to provide unparalleled performance and protection while complying with API and ILSAC specifications. XPR and Nitro Plus racing oils vary in viscosity and formulation from the API-licensed motor oils to provide the greatest performance and protection possible, without regard to API, ILSAC, or OEM specifications.