Royal Purple has been proven to far surpass leading brands of conventional motor oils available on the market today. But don't take our word for it, try it yourself. You'll immediately notice increased horsepower, better gas mileage and lower emissions. And that's just the beginning. Royal Purple with Synerlec is a race proven winner. Racers around the world have credited Royal Purple as a major factor in increasing performance.
California Residents: Proposition 65 Warning