I have the front passenger side and rear driver side tires at 34 psi.
The other two wheels are around 28.
How much is this affecting the mileage on the car? It is a 2004 Cadillac SRX V8, and the valves are stuck on, even when using a pliers. Oil change guys said we need to take it to a tire place to get them off and possibly replaced.
Can I wait on this, or should we get them evened up right away?