when I start my car the tire pressure is as low as 29 and as I drive it might go to 33----I live in hot florida----is this normal?

Yes, that is normal, as the tires get hot the psi will slightly increase. 29 is pretty low, might want to add some air to those tires.

Your driver side door has a sticker stating the recommended tire pressure.. 29 is low.

It should be 36 cold, and will eventually warm up to ~39 driving.

Make that 3 people for the same comments above.

that's why more people are switching to nitrogen, specially if you see dramatic temperature changes between day and night

I ran nitrogen when I first got the car for a while, and have been using air recently. I haven't noticed a big difference between the two. What makes the most difference is direct sunlight versus shade, IMO.

you need to fill the tires every 3 months or so. They'll tend to lose pressure even with a new wheel and new bead. leaking beads, hardened rubber, valve stem seals etc only make the problem worse.

so at 29 you definitely have not filled air for a good while now. Get it back up to 35-37 when cold. Rinse and repeat after a few months.

Do keep in mind that the door sill pressure recommendations are for a fully loaded vehicle...

That said, running the max pressure listed here will likely wear the center out of your REAR tires over the course of 20,000mi if you run around solo and don't have 25 gold bars in the trunk.

As for the front; if your edges are being eatin alive, you might opt to run the max pressure up front.

Wording on the 2IS reads xx.x psi w/5 passengers 825lbs.
Implying max load and cold pressure setting.

Like yours, it does not offer a minimum load/psi. Likely confusing for some?

Obviously the tires choosen should exceed the cars maximum load per tire. That said, many read the tires Max PSI which is the wrong information. Well unless the tires max load matches the cars max load. Then the pressure may be correct.

Let's not revive this thread: https://www.clublexus.com/forums/is-...ire-psi-3.html

Seriously, as long as you have stock wheels, just following the sticker on the inside of the door, except for rare cases such as track days.