I was SO dumb, about 17 when I borrowed my 18 yo buddy's spiffy '55 Mercury hardtop to take new girl out when my older ugly car was laid up.
I was so appreciative and had a great time, so I filled up the gas a full tank, after it only had half when I got it. Thanks, buddy!
So he has a road trip to Portland and is amazed at his wonderful gas mileage, gauge going down so slow... until he ran out of gas still reading half a tank! I was so ignorant that I plugged the tank vent to be helpful when it started 'leaking' when I filled it up. .
Fortunately he was pretty sharp and had a good sense of humor. He used the free in those days compressed air to gently 'inflate' his tank and warned me that if it leaked I'd be under it replacing it with the new one I'd be buying. Also the first time he told me that I was the only one he knew who could probably f*ck up a solid steel ball.