What is your 4 tires PSI when delivered to you>>>??? Better CHECK IT!!

[mazdadude]

What was your 4 tires PSI when delivered to you>>>??? Better CHECK IT!!

The short story is, my tire pressures were not set correctly from dealer delivery. I recommend you check yours.(boom04)


The long story is...

I was disappointed with my cars handling, it felt too squirmy..

I wrote it off thinking that the tires are new, and that they need to release the oils a bit and break in...

At 600 miles I had given up on them, and was looking at replacing them with new tires...

Decide to check COLD pressures of the 4 tires... The closest to the recommended 36psi was still 4psi under inflated, both of the rear were 7 pounds under inflated at 29psi each...(smash)

LEFT FRONT = 30psi
RIGHT FRONT = 32psi
LEFT REAR = 29psi
RIGHT REAR = 29psi

All the pressures in all 4 tires were then brought to the factory sticker recommendation of 36 psi....(drive2)

I now get 4 more MPG on the same route I have been driving, and for the first time ever in MY LIFE got 41.1MPG in a car for a 140 mile trip.(first)

Did I mention that the car feels COMPLETELY DIFFERENT now and this fixed my one gripe I had with this car... I LOVE IT!!!

so please check your pressures... PLEASE NOTE: JUST BECAUSE YOUR TIRE LIGHT IS NOT LIT UP ON YOUR DASH, YOU DO NOT KNOW WHAT THE TIRE PRESSURES WERE AT WHEN THE LAST PERSON PRESSED THE TPMS RESET BUTTON. The only way to do this is to properly inflate all 4 tires to your desired pressure, and then press and hold the TPMS Reset button upon starting the car next time until the TPMS light goes out on the dash. After completing this step, your car now knows that all 4 tires are at your desired pressures and will alert you when there is a deviation from your last setting.

 

[mazdadude]

Just thought I would post an update to the previous post...

I am now getting 41-43 MPG with the correct tire inflation.

 

[Poco Askew]

I checked mine last night. Three of the four were 34 psi according to my gauge. One tire was at slightly less than 36. All are now at 36 psi.
I doubt I'll see any difference in MPG, but I can hope. My MPG is taking a constant nosedive and I can't figure out why. My first tank was all highway and got 37 MPG. Next time I took nearly the identical trip I got 34. I chalked it up to differences in where the gas pump clicked off even though I re-filled at the exact same pump. My next fill was after mixed driving, about 3/4 highway and 1/4 city. That tank was down to 28 MPG. I filled up yesterday after the same mixed driving and I am down to 26.4 MPG. Sux! (dunno)

 

[mazdadude]

I checked mine last night. Three of the four were 34 psi according to my gauge. One tire was at slightly less than 36. All are now at 36 psi.
I doubt I'll see any difference in MPG, but I can hope. My MPG is taking a constant nosedive and I can't figure out why. My first tank was all highway and got 37 MPG. Next time I took nearly the identical trip I got 34. I chalked it up to differences in where the gas pump clicked off even though I re-filled at the exact same pump. My next fill was after mixed driving, about 3/4 highway and 1/4 city. That tank was down to 28 MPG. I filled up yesterday after the same mixed driving and I am down to 26.4 MPG. Sux! (dunno)

Are you remembering to push and hold the INFO button on the steering wheel straight in while the AVG MPG is displayed to RESET after you FILL UP?

Did you remember to RESET the TPMS after changing the pressures?

 

[caf2461]

Mine were 32-33 psi. Bumped them up to 36psi

 

[Poco Askew]

Are you remembering to push and hold the INFO button on the steering wheel straight in while the AVG MPG is displayed to RESET after you FILL UP?

Yes.
However, I'm not going by the car's estimated MPG. I do the math by dividing the miles travelled by the gallons of gas used so the reset doesn't enter into my real-world MPG.

Did you remember to RESET the TPMS after changing the pressures?

Yes.

 

[mazdadude]

Yes.
However, I'm not going by the car's estimated MPG. I do the math by dividing the miles travelled by the gallons of gas used so the reset doesn't enter into my real-world MPG.


Yes.

Great!

 

[fb88]

Do you guys consider getting TyreDog type of external TPMS sensor that gives you precise psi for each tire? overkill?
I've been thinking about it for my current BMW so I don't need to manually check each tire.
One time tire pressure low warning came on and I thought I had a flat, pulled over highway and when I manually checked everything was fine!

 

[ceric]

Mine were between 32 to 34psi. Not even the close to one another.

Also, I took the chance to install wheel locks and found that all the wheel nuts were torqued on the lower side.
I think the spec is 80ft-lb to 107ft-lb. I used a torque wrench and I could easily remove the nuts w/o trying hard.
This was amazing to me. I re-torqued all nuts to 100ft-lb.
Just FYI.

 

[mazdadude]

Mine were between 32 to 34psi. Not even the close to one another.

Also, I took the chance to install wheel locks and found that all the wheel nuts were torqued on the lower side.
I think the spec is 80ft-lb to 107ft-lb. I used a torque wrench and I could easily remove the nuts w/o trying hard.
This was amazing to me. I re-torqued all nuts to 100ft-lb.
Just FYI.

ARGH!!! Now I guess I better go check my lugnuts too...

What I really want is a list of the dealers PDI Checklist, so I can go through it myself... I doubt the dealer did any of it...(bang)

 

[ceric]

You know that vehicles were shipped with PSI>40 so that while sitting in a cargo ship, they won't develop flat spots on tires.
At dealerships before test-drives or delivery, the technicians should have lowered the PSI, and check all fluid levels.

If you think that the guys will re-adjust the PSI to precisely 36PSI, you are expecting too much from these guys.
They probably just let the air out from each tire. They would tend to over-do it.
When they do, I don't think they will pump it up again....

 

[rustychops41]

I had always heard/thought it was closer to 80-100 PSI on the boat ride over, like you said to prevent flat spotting. But yeah, either way, they certainly bleed them off and don't exactly do a careful job of it. I had the opposite happen to my mom when she bought a brand new 1982 Toyota Pickup. She'd had it about 2 years when I ended up driving it one day and it rode like a cement truck. All 4 tires (bias ply!) were well over 80 PSI and mom had never ever touched them since taking delivery. <groan>

 

[stevejbap]

I just picked up a new S Touring about a month ago... I knew the ride was too good to be true (my 2011 3 was stiff). Even though it's a lease, I maintain my cars very well so tires were the first thing I checked. ALL four tires were around 29-30 psi... 18" are supposed to be at 36psi. Even my front driver side tire looked visibly low... Pretty weird and disappointing. My car now rides like a Mazda3 should. Pulls to the left a little on it's own on the freeway.. Not sure if that's normal...

 

[DFGGreaton]

Mazda 3 Grand Touring Sedan.
My TPMS came on at ~7300 miles so I checked all the tire pressures and found them all at about 28psi.
I had already scheduled a 7500 servicing for two days later so I told the dealer to fix the pressure when they rotated the tires.
When I got the car back, I checked the pressure again and the tires were at 32 psi.
I asked the service manager why the tires were at 32 and not 36. At first he said it was my pressure gauge, but then
he asked the tech about it. The tech said he always set the tire to 32 to avoid over-inflation, and that the 36psi in on the
placard in the car is just a guideline.
So what's the story?! Does the tire pressure really matter or is the dealer just too lazy to set the tires right?

 

[concept]

The tire pressures listed on the door sticker is a great starting place. Periodically check each tire's tread wear at center and near the inner and outer edges. Tirerack.com sells digital tread depth indicators for accurately completing this task. If the center of the tire is wearing faster than the outer and inner areas, your tires are over-inflated. If the outer and inner areas are wearing faster than the center, your tires are under-inflated.