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Check your tire pressure

  1. Jul 10, 2008 #1
    I had my car tires inflated by 10-20%, and my mileage (mostly city) went from 22.5 to 25 mpg. Does this sound feasible?
  2. jcsd
  3. Jul 10, 2008 #2


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    Staff: Mentor

    Yes. The downside is increased asymmetric tire wear, with the middle wearing out faster than if the tire were correctly inflated. But with gas prices where they are, it still may be an economic win. Traction is less though, so there is an increased chance of crashing in some situations.
  4. Jul 10, 2008 #3
    Very interesting.

    I don't think that my tires are so overinflated, though. Assuming the tires are now at the correct pressure, do my figures above agree with automotive experience?
  5. Jul 10, 2008 #4


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    Staff Emeritus
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    I increased my tire pressure by 2psi and saw about a 2mpg improvement in gas mileage. Sounds similar to what you are seeing.
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