View Single Post
      11-06-2012, 03:24 PM   #14
J-Spec Dan
SHAMONE!
 
J-Spec Dan's Avatar
 
Drives: E90 330i
Join Date: May 2011
Location: C H I C A G O

Posts: 2,452
iTrader: (2)

Garage List
2006 E90 330i  [4.30]
Quote:
Originally Posted by mike-y View Post
could also be a difference in overall tire diameter between the 19s and the 17s.
that. you've got more rotating mass per corner with 19's + tires VS your 17s + tires. and you can't just look at one corner. you have to add up the weights in all four corners. also, your car is lower with 17s VS 19s so it could reduce drag.

and although the mpg calculator in our cars are nice, just keep track of how many miles you run on a full tank (or whenever you fill up). that'll give you a more accurate calculation.
__________________
BMW CCA Member 483866
J-Spec Dan is offline   United_States
0
Reply With Quote