Gas cap behind the license plate lasted until the 1990’s, my 1995 Buick had it there.
Very convenient, didn’t have to worry which side of the pump to pull into.
I had a Riviera like that. The last of the FWD V8 ones.
Yes, I had a car with the gas cap there too. The annoying thing was I was driving an old Delta 88, so if the car at the pump in front of me didn’t pull up far enough, I had to sit and wait for them to leave. Otherwise, I could not pull up far enough to get the stupid hose all the way to the back of the car.
“Very convenient, didn’t have to worry which side of the pump to pull into.”
On the gas gauge of my SUV there’s a little arrow pointing to which side the filler is on. Not like you fill up so infrequently that you’d forget...