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Tires VS Gas milage

Discussion in 'Performance & Fuel' started by RedneckGirl, May 23, 2010.

  1. RedneckGirl

    RedneckGirl New Member

    I have a 1995 1500 4x4. Is there a way to figure out your gas milage when you put bigger tires on without having to hook it up to a computer? I have 36's on my truck so I know my milage is way off from what it says. I think it's a 1/10 of a mile off for every mile but I'm not sure.
  2. bigdaddy77084

    bigdaddy77084 New Member

    Have someone follow you. Then just do the math. What a p.i.t.a.
  3. murdog94

    murdog94 New Member 1000 Posts

  4. canislupis69

    canislupis69 New Member ROTM Winner 1000 Posts

    If you have a gps like a garmin or tom tom, these will tell you your true mileage while you are driving also.
  5. Enkeiavalanche

    Enkeiavalanche Moderator ROTM Winner 1000 Posts

    With the bigger tires and wheels. There is also more mass for your motor to turn. You are going to see a decress in braking and MPG's.. If you were getting about 14 mpg's before I would say your down to about 12 now...AVG..
  6. Enkeiavalanche

    Enkeiavalanche Moderator ROTM Winner 1000 Posts

    With the bigger tires and wheels. There is also more mass for your motor to turn. You are going to see a decress in braking and MPG's.. If you were getting about 14 mpg's before I would say your down to about 12 now...AVG..
  7. Metaluzc

    Metaluzc New Member

    A crude way of measuring would be to determine how many gallons of fuel your tank holds, fill up your fuel tank, keep track of your mileage as you drive until you have a half of tank of gas, then do the calculations. i.e. you drive 100 miles on 5 gallons, you will get 20 miles per gallon. Definitely not 100% accurate, but you can get a rough guesstimate if you don't own a gps :).
  8. sc99z71

    sc99z71 New Member

    Use a tires size calculator and figure out what percentage your speedo and odo are off. Then after a full tank of fuel take your mileage and add whatever percent the calculator gave you and that should be real close to your actual miles driven. Then do the simple miles per gallon math and your done.

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