bigger tires how bad of gas milage?

[transmissionguy]

Hello I have a 94 xlt and i am wanting to put 32inch tires on it , I know it will affect my gas milage but by how much? Is it gonna be a very noticable difference cause I do alot of highway driving back and fourth to work.

 

[Jason_25]

The higher your rearend gearing, the worse they will affect gas mileage. If you have 3.08's and 33's, you will probably be getting 10 MPG, if ypu have 3.73's and 31's you will probably get 18-19 on highway as long as everything else is in order.

 

[transmissionguy]

thanks for the help ! I hope mines gets about 18 cause gas prices around here suck !

 

[transmissionguy]

oh one more question how do i find out my gear ratio?

 

[Jason_25]

http://www.explorerforum.com/ntrprize/Axle.htm