Originally Posted by Gel214th
When I went to the gas station to put air in the tires they were actually a bit over pressured according to the tire pressure chart on the inside of the driver's door.
They will be - tyres are rated for pressure when "cold" ie the car hasn't been used for a few hours. If you check your tyres after driving for more than a few minutes the heat will cause the air in them to expand resulting in a higher pressure reading. If you let some air out based on that they may now be under-inflated.