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  #25  
Old 04-30-2012, 01:38 AM
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Re: Tire pressure

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Originally Posted by vnbWK2 View Post
Why do dealerships consistently over-inflate the tires way over the recommended pressure? Do they have the right equipment? I had my free oil change done at the dealership (and some TSB's applied) a few of weeks ago and apparently they checked my tire pressure as well. I went to check my tires yesterday using my trusty mechanical gauge and all four tires read 40 psi (38 cold). The sticker on the door clearly states 33 psi cold. I wouldn't mind if it was a couple of psi's over 33, but to 38? I'll have to air them down tomorrow morning to 33-34psi cold. I was wondering why the ride felt harder then before. I just remembered they also replaced my rear shock mounts (TSB) so now I have to get my torque wrench out and check if they over-tightened the lug nuts....I might as well check all four wheels .
They do that so that when you drive out of the dealership the car feels light and responsive giving you the feeling they have done something good.
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  #26  
Old 05-01-2012, 08:47 PM
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Re: Tire pressure

If the tire pressure is at 38 but the recommended psi is 33 will our Gas Mileage go down if we deflate the tires down to the recommended pressure?
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  #27  
Old 05-02-2012, 01:19 AM
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Re: Tire pressure

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Originally Posted by jeepmonster View Post
If the tire pressure is at 38 but the recommended psi is 33 will our Gas Mileage go down if we deflate the tires down to the recommended pressure?
Yes! That's because a softer tire has greater rolling resistance. Whether the difference will be significant, I can't say. There is also the issue of tire wear. The correct pressure, not too high and not too low, will give the most even wear and therefore longer life. I find you get better information from the tire manufacturer. The tire manufactuer is interested in you getting the best mileage out of his tires whereas the car manufacturer is more interested in you having the most comfortable ride.
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  #28  
Old 05-02-2012, 01:01 PM
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Re: Tire pressure

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Originally Posted by BobT View Post
Yes! That's because a softer tire has greater rolling resistance. Whether the difference will be significant, I can't say. There is also the issue of tire wear. The correct pressure, not too high and not too low, will give the most even wear and therefore longer life. I find you get better information from the tire manufacturer. The tire manufactuer is interested in you getting the best mileage out of his tires whereas the car manufacturer is more interested in you having the most comfortable ride.

Tire manufactures do not recommend tire presssure the only thing they do is tell you what the max pressure is for the tire which you should never go by. The recommended tire pressure comes from the car manufacture and is the pressure the tire manufacture will go by.
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Old 05-03-2012, 12:15 AM
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Re: Tire pressure

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Originally Posted by jp467 View Post
Tire manufactures do not recommend tire presssure the only thing they do is tell you what the max pressure is for the tire which you should never go by. The recommended tire pressure comes from the car manufacture and is the pressure the tire manufacture will go by.
Well I got a lot of help from the local Bridgestone guy over the Adrenalin Potenza RE001s I used to run. He recommended 5kpa above what the car manufacturer recommended and I got much better performance and wear out of them. Maybe you won't find anything on the net but real people can be very helpful.
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  #30  
Old 05-03-2012, 12:28 AM
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Re: Tire pressure

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Originally Posted by BobT View Post
Well I got a lot of help from the local Bridgestone guy over the Adrenalin Potenza RE001s I used to run. He recommended 5kpa above what the car manufacturer recommended and I got much better performance and wear out of them. Maybe you won't find anything on the net but real people can be very helpful.

That would be someone giving a personal opinion. You would not get anything offical from Bridgestone saying to run your tires higher than what the car manufacture recommends. Bridgestone or any tire manufacture would tell you to go by the recommended cold pressure the auto manufacture recommends.
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  #31  
Old 05-04-2012, 09:35 AM
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Re: Tire pressure

I keep my tires at 34 psi all the way around (18" Latitudes), and they quickly warm up to 38-39 psi on the freeway. I find that at higher pressures, the tires will warm up to 40 psi+ and the ride comfort degrades significantly.

That is why the recommended pressure is 33-34 psi cold. Personally, I would not go above 35 psi cold.
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Old 05-19-2012, 03:45 PM
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Re: Tire pressure

Just picked up my 2012 Laredo X and checked pressure for heck of it - 41 psi. on all 4 tires.
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