Tire pressure - Chrysler 300C Forum: 300C & SRT8 Forums
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post #1 of 23 (permalink) Old 11-28-2010, 11:50 PM Thread Starter
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Tire pressure

Hi,

I brought my 300C to the dealer for periodic maintenance last week. After getting back home and checking in details the bill, found the dealer set the tire pressure to 36psi (the manual says 30psi).

I don't think the dealer (a long time Chrysler dealer in California) tech was stupid of not to follow whatever it should be, especially it's now written black & white on the bill. Is it a general practice for dealers to set tire pressure 20% above manufacturer recommendation, or they just want the tire to wear faster for potential tires business?

Should the dealer have told their customers BEFORE doing it, or at least inform customer by the time of releasing the vehicle?

Any comments are appreciated.

Thanks.
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post #2 of 23 (permalink) Old 11-29-2010, 10:54 AM
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Never trust a dealer or service facility to set your tire pressure correctly.

My SRT8 is supposed to be 32 psi all around. I've had two different Chrysler dealers overpressure the tires, and my local independent garage did the same thing (once). 45 psi makes her ride kinda hard.

The garage's excuse was that a pressure gage was defective. The second dealer told me he'd notified his employees and emphasized the need for correct pressures. The first dealer never got a return visit.

My recommendation ? Buy a tire gage and use it.

Jim

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post #3 of 23 (permalink) Old 11-29-2010, 11:23 AM
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The tyre pressure sticker on my car recommends 36psi front and rear, however I'm in Europe.
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post #4 of 23 (permalink) Old 11-29-2010, 12:08 PM
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Despite what the Mfg reccommendation is (30-32 psi) I have run my tires at 36 psi since day one because they wear more evenly (which means the Mfg rec. is too low IMHO) and it doesn't hurt fuel economy either.

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post #5 of 23 (permalink) Old 11-29-2010, 03:39 PM
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I go with 34 & the dealer I got the tires from recommended 35-36..
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post #6 of 23 (permalink) Old 11-29-2010, 04:26 PM
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i have mine set around 36 psi but i have 22s....i try not to let mine get below 34 psi and not above 38 psi and i recently had to add some air to my tires since they were below 34 psi and the mileage was horrible and since then has improved just a bit.

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post #7 of 23 (permalink) Old 11-29-2010, 04:52 PM
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On these cars, low tire pressures will wear out your tires faster than Madonna sheds knickers. . . .

I keep mine between 34 to 36 psi for street driving. I like them up around 40 psi for lapping on road circuits.

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post #8 of 23 (permalink) Old 11-29-2010, 06:56 PM
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Read the psi recommendation on your TIRE! Not the manual, not what it says in the door well.
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post #9 of 23 (permalink) Old 11-29-2010, 07:21 PM
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Quote:
Originally Posted by Scumbag Inc.™ View Post
Read the psi recommendation on your TIRE! Not the manual, not what it says in the door well.
Wrong! The tire has no recommendations beyond the maximum bead-seating pressure and max load at max pressure. The door placard is the authority. I use 30 psi unless it's trip time. Then they go to 33 psi.

Last edited by MikeHTally; 11-29-2010 at 07:23 PM.
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post #10 of 23 (permalink) Old 11-29-2010, 08:44 PM
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The recommended tire pressure is 32 psi COLD. If you checked your tire pressures as soon as you got home (hot), then 36 psi is probably about right. Check the tire pressure first thing in the morning after the car has been parked.

DO NOT fill your tires to the pressure stamped on the tire...this is the MAXIMUM tire pressure that the tire can safely be run at. The pressure noted on the drivers door jamb is the recommended pressure for maximum safety, economy and comfort.
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