what psi do i set my oem ap1 tires ? i live in northern california temp is around 70-80 normal...90+ ahhh it happens ... i have it at 40psi should i change it? thanks!

 

32-35psi per the door sticker

 

Door sticker usually is for softest ride.

Tire manufacture puts a recommended max load tire pressure on the sidewall of the tire.

I usually find a pressure between the two that gives best performance.

 

I would say no more than a couple pounds more than the OE PSI. More PSI will wear the tire down the middle. A couple more will improve handling

 

Depends on how you want the car to handle, how you much you care about tire wear and ride comfort. For best handling I ran my tires about 36 PSI front and 34 rear. Rears wore down the middle from over inflation. Fronts wore about perfect.