A brand new G35 with Goodyear RS-A P215/55 R17 tires was released from dealership with the tire pressure of 45 PSI, manual says that pressure should be 30 PSI. I know it looks naive but I can't help myself trusting dealer's expertise. Could that be that there was a reason to keep the tire pressure that high? Thanks

 

A good basic rule of thumb is that for optimum performance a tire should be at ~~80% of max inflation pressure 51 psi x 0.8= 40.8 psi cold.
44 psi x 0.8 =35.2 psi.

Tire decal sticker numbers are the absolute safe minimum COLD [expected to warm up 4-5-6 psi under actual driving conditions.

 

45PSI on stock 17inch G35 wheels... Don't go over 35max PSI

 

I was putting in my springs this weekend and checked my tire pressure and it read 50 PSI!!! I got my oil changed not long ago at Infiniti and think some dumb**** put in too much air.

 

Never trust dealers... for that money the experience is supposed to be enjoyable, but almost every time it turns out to be opposite

 

and then I want to thank you guys for helping me out. Good Luk with your Gs !

 

nope. happened to me. the cars come that way and the dealer should have checked it before delivery to you.

 

After having a flat I had to get a low tire sensor re-set. A week later something said," don't trust the dealer' so I checked the pressure ......... 27 lbs. Now my opinion is that a lot of the tire wear issues on Coupes stems from underinflation so I was pissed after meticulously maintaining 35 lb.s in mine. This all went well with the greasy hand prints on my black door. (No, I don't let the dealer wash my Coupe ......... in fact I took it home new with the protective plastic ripped off only ----- no swirls or worse, compliments of the 'high caliber' employees I see lurking near the wah area!!!!!
I'man old timer and I remember the days car dealers REALLY took care of you ........ too bad for the most part (IMO) Infiniti just can't sem to stack up.

 

Many of the car companies ship their cars with 40+ lbs of air.....I think it helps when they tie the cars down on the carriers. They should adjust the pressure before releasing the car to the new owner.

My dad had the same problem with his Chrysler....50 lbs

I had new tires put on my G a month ago when it was close to 100 degrees here. Yesterday it was in the mid 60's......and my tire pressure sensor was going off left and right. When I checked my tires, they had only 32 lbs after I had driven about 60 miles....so they probably were less than 30lbs cold.

Bottom line....like everything else...you need to check your own oil, fluids and most of all tires......

 

the tires come overpressured at 45-50psi and then before delivery the dealership is supposed to adjust it down to 33-34psi