View Single Post
Old 03-10-2009, 03:40 PM   #4 (permalink)
cfg83
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 530 Times in 356 Posts
UnCivic -

Welcome to EM! I did a modest one-size-up tire mod :

http://ecomodder.com/forum/showthrea...ires-2642.html

The tire calculators on the net showed a 2% change, i.e. the speedometer will read 2% slow.

Since my odometer is calibrated for an OEM tire size, I did a GPS correction that agrees with the calculations, a 2% difference. Now, when I do my fuel logs, I add 2% more miles to the number of miles on the odometer. For example, if I drive 100 miles, I write down 102 miles in my fuel log.

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote