I got toyo proxes 4 plus' all around on 19" 15 spoke g37s/q60s wheels (kept tire measurements the same as stock except the wheel size obv). Psi light came on last night (got down to low 20s here in NY) so i went and checked the pressures and they were all at 20 LOL. I honestly never paid attention to them maybe thats why ive been getting 12-13 mpg for so longlol.. inner driver door calls for 33 all around, should they really be the same all around especially wih the weight in the front?! I just set them to 34-35 in the back and 38-39 in the front. Took it for a spin around the block and... holy s*** its like im gliding . I dont know why but the tire psi light is STILL on. Wtf?

Max psi on them says 50.

What do u guys think i should have them at especially since the winter is about to hit.

 

90% of max pressure works just fine, car winter tires perform best with good winter rubber and tread.

Check that your TPMS nuts are tightened down as I had a dealer forget to tighten mine and that tire kept losing air lol.

 

Ya I'd double check those TPMS

 

If the TPMS just started coming on after the tire install it's possible one of the TPMS sensors got messed up.

 

If you haven't checked your tire pressure for a while who ever installed those new tires didn't fill them to the correct psi! I had this happen a while ago at the dealership only to find out their gauge was way off after my tps warning came on a few days after service. I run 37 psi on all four corners and my tires wear even/flat. You don't ever want to run max psi in your tires, it's not safe and it would be like driving the Flintstone mobile. Dash warning should go away shortly after bringing your tires up to the correct psi. If this continues take your G to a quality tire shop where they can read your sensors and recheck your tire pressure. Not the Stealership!
Gary

 

it's possible one of the TPMS sensors got messed up.