I saw one on the tailgate of a Ram 3500 diesel ... though a bit risque ...

"I'd rather be Cummin than Strokin' "

Obviously, a play on the Cummins & PowerStroke Diesels names, but I'm certain a lot of folks unfamiliar with diesels would wonder how he got to the first without doing the second. Me? I enjoy the journey just as much as the destination ... and sometime more.