Checked Tires' psi, now what?
I have a jeep liberty 04. I wanted to check pressure to make sure I can save money on gas. I can tell that the tires are smaller then the original. The tires are: 2 GTradical (back) 1 Goodyear (front) 1 Integr (front) The back say 40 max and the front say 44 max. 1 of the back one is 39 and the other is like 22. and the front are 29 and 24. The guy in autozone said a typical sedan is like 40-45. Should I put them all up to 39? I don't like the results of what I saw. Should I get new tires even?