How much air? Go by door or tire?
Even if thy arent the same size tire that came on the car?
What size do you have? If they are larger you probably could reduce the pressure by a small amount.
I use the recommended pressure as a starting point. If the tires wear in the middle I reduce pressure or wear on the edges I increase pressure. If you carry a lot of weight in the car it is a good idea to increase pressure as long as you do not exceed the maximum pressure on the sidewall.
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