Air used to be free at the gas station, now it costs 2.50. You want to know why?

Inflation.

More dad jokes you'll groan at

An officer pulled me over for driving in circles. I was just going for a little spin.Why did the ghost go to rehab? He was addicted to boos.Why did the ram run over the cliff? He didn’t see the ewe turn.What has ears but cannot hear? A cornfield!What has a spine but no bones? A book.Knock Knock Who's there? Harold! Harold who? Harold do you think I am?