Royal Purple’s XPR 10W-40 Extreme Performance Racing is specifically formulated for the demands of multi-platform racing environments. XPR achieved popularity in a variety of motorsports including NASCAR, NHRA, World of Outlaws, and Bonneville Salt Flats. XPR combines the highest quality of synthetic base oil with Royal Purple’s proprietary Synerlec additive technology. Combined with additional performance enhancers to create a lubricant that maximizes horsepower and torque, while providing the highest level of protection against heat and wear. XPR provides more protection than leading synthetics and conventional lubricants including those combined with aftermarket additives. With Royal Purple professional engine builders and race teams cite increased horsepower and longer engine life, that gains its performance advantages from Royal Purple’s proprietary Synerlec additive technology.