How do you calculate the difference in the odometer reading for MPG? Is there a way to correct this problem?

------------------
98 f-150 extended cab 4x2
fabtech 6.5
35x12.5 super swampers
16x10 eagle alloys
geniune steel pro steps
billet grills
toneau cover
white face guage with carbon fiber overlay
12" jl audio's
6'5 component polk audio
3300 xtant amp
Clarion autopc

 

1. You could just drive on the freeway and look at the milemarkers and figure out to what percentage you are off then adjust your MPG accordingly.

2. Look inside the door at the size tires...new tires/old tires multiply that by the current MPG based on your odometer and voala.

 

Thanks for your help!

------------------
98 f-150 extended cab 4x2
fabtech 6.5
35x12.5 super swampers
16x10 eagle alloys
geniune steel pro steps
billet grills
toneau cover
white face guage with carbon fiber overlay
12" jl audio's
6'5 component polk audio
3300 xtant amp
Clarion autopc

 

Sorry for the delay in getting back to you... been out of state since Friday! Try this calculator... the percentage difference that your speedometer is off by should be the same percentage your odometer reading is off. going from the stock 29" tires to 35" works out to be about 19%. I round to 20% just because I can do that math in my head!

http://www.andthensometoo.com/calc/tiregear.php

------------------
-JonC-
*Silver 2000 4x2 F150 Supercab
*4.6L Triton V8
*315/75/16 Pathfinder ATR's
*16 x 8 Panther Custom 108's
*K&N GenII FIPK
*Custom Cat-back w/ Flowmaster 50 Series
*Fabtech 6.5" "Ultimate" suspension lift
*Smittybilt nerf bars
*Extang Black Max soft tonneau
*Stull billet grille
*Clear corners
*Heckethorn steering stabilizer


[This message has been edited by JonC (edited 04-03-2001).]