I guess the Pentastar is a great logo--it is well recognised, and lends itself to easy application. I do not know when it came into use. Personally, I like the Forward Look logo Chrysler used starting in 1957. I don't know when it went out of favor, but unfortunately, it was not all that long a run. My car is a 56, so it is not that it is on my car, or even refers to it.