This came from a listener named Daniel Goddard:
Back in the late seventies when I was in college, I had a vanity plate that read: "BO IN" What was the car?
Answer: Bo in Arrow. Plymouth Arrow.
In 1973 our listener, Steve Blunden, had a license plate that read "16OZO." (Here's a hint, he was never rear-ended.)
Answer: Pinto (16 oz = 1 pint, + o = Pinto)
Shlomit Aucielloe wrote:
"...one of my mother's doctors has a license plate that read's 'OLOGIST.' Can you guess the car and the guy's trade?
Answer: Audi-ologist
Susan Krouse saw this license plate on a Chevy in North Carolina: "VLAD THE"
Answer: Impala
