It's hard enough to understand things that you can see. For instance, electronic fuel injection, Rubik's Cubes, and those with the double-X chromosomes. As utterly baffling as they may be, things get ...

Royal Purple's vivid motor oil doesn't just promise protection — it sells performance in a bottle. With claims of it being stronger than conventional oil, better oxidation resistance, and a Synerlec ...

When shopping for and researching the best possible oil for your car, two options will likely come up a number of times: Royal Purple and Pennzoil Ultra Platinum. While oil specifics might not matter ...