Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 03-19-2012, 05:21 PM
johnd1976's Avatar
johnd1976 johnd1976 is offline
Officially Welcomed to the 'Fest
Location: toms river nj
 
Join Date: Jan 2012
Posts: 209
Mein Auto: 2007 530xi
Mpg before and after wheel upgrade

I noticed my mpg went from 21 to 24 .Is this correct?Do I really save on gas because I added 18inch wheels?
Reply With Quote
Advertisement
  #2  
Old 03-19-2012, 05:47 PM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,050
Mein Auto: 2003 530 Sport Twins
normally 1" will add 2-3MPG
and if you will add 22" wheels the MPG will jump to 30MPG ( no jokes )
try it
__________________

Last edited by champaign777; 03-19-2012 at 05:49 PM.
Reply With Quote
  #3  
Old 03-19-2012, 05:55 PM
johnd1976's Avatar
johnd1976 johnd1976 is offline
Officially Welcomed to the 'Fest
Location: toms river nj
 
Join Date: Jan 2012
Posts: 209
Mein Auto: 2007 530xi
Is it true mpg tho and 22s lol wow not for me 18s are rough riden feel alota bumps
Reply With Quote
  #4  
Old 03-19-2012, 07:00 PM
George16 George16 is offline
Officially Welcomed to the 'Fest
Location: Jacksonville, Florida
 
Join Date: Feb 2012
Posts: 217
Mein Auto: 2003 530iA
Quote:
Originally Posted by johnd1976 View Post
Is it true mpg tho and 22s lol wow not for me 18s are rough riden feel alota bumps
Of course it's true since you're now coverng the same distance in less amount of time due to bigger tires/wheels .
Reply With Quote
  #5  
Old 03-20-2012, 12:29 AM
Dogsbreath Dogsbreath is offline
Registered User
Location: North coast of NSW, Australia
 
Join Date: Jun 2011
Posts: 98
Mein Auto: 540i Sport
And the bigger the wheel the slower the stopping time ??????????
Reply With Quote
  #6  
Old 03-20-2012, 12:41 AM
Fast Bob's Avatar
Fast Bob Fast Bob is online now
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,473
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by Dogsbreath View Post
And the bigger the wheel the slower the stopping time ??????????
Yep....along with slower acceleration and turning response.
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #7  
Old 03-20-2012, 01:12 AM
LalaRay's Avatar
LalaRay LalaRay is offline
Boosted
Location: Maryland
 
Join Date: Dec 2011
Posts: 899
Mein Auto: 03 ///M5
19s and im getting 20mpg
__________________
2003 ///M5. ~ Jet Black/ Le Mans Blue

RK Supercharged @ 501wheel horsepower
Supersprint Headers,
Evolve Alpha N Tune,
CNS lightweight dm flywheel/Spec clutch,
ST coilovers,
Eibach Rear Sway bar/Beast Power Brackets,
Drilled slotted Rotors/Akebono Euro pads,
Magnaflow 14816 Mufflers

_____________________________

Last edited by LalaRay; 03-20-2012 at 01:13 AM.
Reply With Quote
  #8  
Old 03-20-2012, 04:11 PM
acagann acagann is offline
Registered User
Location: Indianapolis
 
Join Date: Mar 2012
Posts: 7
Mein Auto: 2003 525i Sport
LOL. You guys need to watch this...http://thechive.com/2012/03/19/women...science-video/
__________________
03 525i Sport
85 911 Carrera Euro
Reply With Quote
  #9  
Old 03-20-2012, 04:38 PM
Dogsbreath Dogsbreath is offline
Registered User
Location: North coast of NSW, Australia
 
Join Date: Jun 2011
Posts: 98
Mein Auto: 540i Sport
Judging by the video, if I put larger wheels on my car and change the diff ratio and take out the back seat to lessen the weight and remove the mirrors to get less drag I'm still going to go 80 miles in an hour travelling at 80MPH.
This guy is, however not being very nice to this girl (even if she is blonde).
Reply With Quote
  #10  
Old 03-20-2012, 06:19 PM
16valex's Avatar
16valex 16valex is offline
Officially Welcomed to the 'Fest
Location: Albany NY
 
Join Date: Jul 2004
Posts: 2,611
Mein Auto: 530I/5SC 97-528/5
Quote:
Originally Posted by George16 View Post
Of course it's true since you're now coverng the same distance in less amount of time due to bigger tires/wheels .
If that's true then you will get less MPG.
Reply With Quote
  #11  
Old 03-20-2012, 07:24 PM
johnd1976's Avatar
johnd1976 johnd1976 is offline
Officially Welcomed to the 'Fest
Location: toms river nj
 
Join Date: Jan 2012
Posts: 209
Mein Auto: 2007 530xi
Ok ok so am I really at 24mpg with 18s and at 21 with 16s in other words am I saving at the pump?
Reply With Quote
  #12  
Old 03-20-2012, 09:38 PM
Fast Bob's Avatar
Fast Bob Fast Bob is online now
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,473
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by johnd1976 View Post
Ok ok so am I really at 24mpg with 18s and at 21 with 16s in other words am I saving at the pump?
No, you`ve just been catching a 60 mph tailwind since you switched wheels....
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #13  
Old 03-21-2012, 03:12 AM
George16 George16 is offline
Officially Welcomed to the 'Fest
Location: Jacksonville, Florida
 
Join Date: Feb 2012
Posts: 217
Mein Auto: 2003 530iA
Quote:
Originally Posted by johnd1976 View Post
Ok ok so am I really at 24mpg with 18s and at 21 with 16s in other words am I saving at the pump?
How are you getting these numbers? Is it from the OBC, or doing the math yourself; mpg= miles traveled/gallons used?
Reply With Quote
  #14  
Old 03-21-2012, 04:54 AM
Fudman's Avatar
Fudman Fudman is offline
Officially Welcomed to the 'Fest
Location: Sudbury, MA
 
Join Date: Apr 2007
Posts: 6,223
Mein Auto: '02 530i Sport auto
If you maintained the same tire circumference when you increased wheel diameter (by decreasing tire sidewall height ratio), you likely have incorrect data as gas mileage readings can vary greatly due to the multitude of variables associated with gas mileage. Under controlled testing, Car & Driver determined that increasing wheel diameter typically reduces gas mileage and slows acceleration (while also compromising ride quality) because plus size wheels & tires weigh more than standard size wheels & tires. You do get improved handling. Your improved gas mileage is likely due to other factors such as change from winter to summer gas, different driving terrain, conditions, etc.
Reply With Quote
  #15  
Old 03-21-2012, 06:06 AM
johnd1976's Avatar
johnd1976 johnd1976 is offline
Officially Welcomed to the 'Fest
Location: toms river nj
 
Join Date: Jan 2012
Posts: 209
Mein Auto: 2007 530xi
@George from the dashboard readout
Reply With Quote
  #16  
Old 03-21-2012, 09:49 AM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 21,229
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by Fudman View Post
Your improved gas mileage is likely due to other factors such as change from winter to summer gas, different driving terrain, conditions, etc.
See also:
- What gasoline mileage should an E39 get (1) (2) (3) (4) (5) (6) (7) & the truth about mpg calculation accuracy (1) (2) & E39 great mpg stories (1) (2) (3) & E39 awful fuel mileage issues (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25) (26) (27) (28) (29) (30)
__________________
Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
Reply With Quote
  #17  
Old 03-21-2012, 09:55 AM
Quick99Si Quick99Si is offline
Officially Welcomed to the 'Fest
Location: Chicago
 
Join Date: Jul 2011
Posts: 362
Mein Auto: 2004 M3 6MT
Quote:
Originally Posted by johnd1976 View Post
@George from the dashboard readout
Throw those numbers out of the window then, my friend. Record your miles driven* at every fillup, fill it to the auto shutoff at the same pump every time, do some magic math with miles and gallons to get actual MPG.

*open up a tire size calculator to see how much off your current tire is compared to stock. Use that correction factor to adjust your trip meter before calculating MPG.
__________________

540i - Stock/Sport / 6MT / 13.9@100mph
WS6 - 231/234 / 6MT / 4.10 / 410rwhp
ITR - 262/262 / 5MT / 12.2:1 / 9600rpm

540i/6 Sport, Jet Black, Style 65, LED tail, DICE+GROM USB, !CDV, Redline MT-90, M1 0-40w
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 08:15 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms