"I used more STP than the other guys" that is what I call great advertising

Mario Andretti, ain't that cool!

STP ads from the 60's

The below column references the above advertisements typed letter, click on it for full size

STP most likely is best known as the sponsor for the Petty race team, and I bet you'll be surprised to learn that STP was the Chemical Compounds division of Studebaker (it's in the fine print... look at the 3rd ad very closely once you click for full size)