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unusual tire pressures and MPG
Chevrolet Malibu Chevrolet Malibu Discussions (alt.autos.chevrolet.malibu)
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#11
 
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Re: unusual tire pressures and MPG -
08-06-2005
, 12:30 PM
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"Duane" <NoSpam (AT) hotmail (DOT) com> wrote in message news:Siqge.1196$j17.840 (AT) newssvr33 (DOT) news.prodigy.com... I've been maintaining the unusual tire pressures GM recommends (29 front and 26 rear) with regular rotations (every 5k mi) and I got 50k mi out of the Firestone Affinity's. I just replaced them with Goodyear TripleTred tires that I like a lot. My question is has anyone had experience or tried using the typical 34 psi that my tire shop wants to put in every car tire. I learned from Discount Tire that most Firestone Affinity tires wear thin in the center first, like mine did, even with the 29/26 psi pressures. They were suggesting that 34 psi might be better with my new tires. On a related topic, our fuel mileage has only been 25 mpg on long freeway trips, never have we got the 30 mpg I've heard others brag about. Maybe the 29/26 psi tire pressure contributes to our mediocre mileage. Thank you for any shared experience about tire pressures on Malibu's. - Duane I fill my tires to 40 PSI, also, I've noticed I get about 24 MPG on the freeway driving 70 when I slow down to 65, I get 28 MPG and when I do 55 I've gotten around 30, also I made a switch from Regular Unleaded (89 Octane I think) to Premium (92) and have gotten about a 40 mile increase in the overall tank, I reset my trip meter everytime I fill up and with 89 octane was getting about 315 to 320 Miles, with the premium fuel I'm getting about 350-360 Miles to the tank, plus it is usually better for you motor as far as keeping deposits from forming as fast. Howdy Daniel G |
milage.
The cheapest gas is the gas that costs less per mile, not per gal.
Sometimes they are the same, sometime not.
--
Throckmorton P. Ruddygore
#12
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I fill my tires to 40 PSI, also, I've noticed I get about 24 MPG on the freeway driving 70 when I slow down to 65, I get 28 MPG and when I do 55 I've gotten around 30, also I made a switch from Regular Unleaded (89 Octane I think) to Premium (92) and have gotten about a 40 mile increase in the overall tank, I reset my trip meter everytime I fill up and with 89 octane was getting about 315 to 320 Miles, with the premium fuel I'm getting about 350-360 Miles to the tank, plus it is usually better for you motor as far as keeping deposits from forming as fast. What year/engine do you have? |
Thanks
#13
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| I fill my tires to 40 PSI, also, I've noticed I get about 24 MPG on the freeway driving 70 when I slow down to 65, I get 28 MPG and when I do 55 I've gotten around 30, also I made a switch from Regular Unleaded (89 Octane I think) to Premium (92) and have gotten about a 40 mile increase in the overall tank, I reset my trip meter everytime I fill up and with 89 octane was getting about 315 to 320 Miles, with the premium fuel I'm getting about 350-360 Miles to the tank, plus it is usually better for you motor as far as keeping deposits from forming as fast. What year/engine do you have? Thanks |
#14
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over inflation of tires will result in at the least rapid wear of the center of the tread. at worst, the tire could suffer damage to the cords of the belting. also your breaking distance will be increased major amount and traction will suffer. |
Also accelerated wear of suspension components.
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