Hey Andrew,
The page belwo is from my 2006 Owner Manual. Make sure your tires are cold before adjusting them. As JCL mentioned moisture content in the tire plays a big role in expansion. Some of those underground pumps that you find in your local gas stations have very high moisture content. If you use them I suggest letting the air out for a while before you actually fill up your tire. In some cases, you can actually see water drips from the air hose. And that’s why I bought a small air pump long time ago. I usually check the tire pressure once a month when the car has been parked over night.

Good luck,


Ashkan