E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 08-25-2012, 09:34 PM   #1
edz2003
Registered User
 
Join Date: Mar 2011
Location: MD
Posts: 148
My Ride: 2003 325ci
Average MPG??

Hi everyone,

My MPG has been lurking around 18.8 and used to be at least 20! What could be causing this? Checked my tire pressure and have some idle issues which should be fixed once I clean my ICV? Any idea how I can get it Back up to i guess normal which should be around 25mpg? Thanks
edz2003 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 08-25-2012, 09:43 PM   #2
tock172
Beachtown Bill Collector
 
tock172's Avatar
 
Join Date: Jan 2011
Location: San Diego
Posts: 2,892
My Ride: '99 Techno Violet M3
O2 sensors and VANOS come to mind. What's your current mileage?
__________________


1999 Techno Violet Metallic BMW M3
2005 Audi B6 S4 quattro 6MT
2004 BMW 330i
1986 BMW 535i

tock172 is offline   Reply With Quote
Old 08-26-2012, 12:56 AM   #3
edz2003
Registered User
 
Join Date: Mar 2011
Location: MD
Posts: 148
My Ride: 2003 325ci
So done the vanos and not getting a check enginee light for o2's!! Got 113k miles 2003 e46 coupe
edz2003 is offline   Reply With Quote
Old 08-26-2012, 02:08 AM   #4
katu
Registered User
 
Join Date: Jan 2011
Location: Santa Rosa, CA
Posts: 574
My Ride: '04 330ci ZHP
113k miles, do you have any leaks/holes in your intake boots?
__________________
katu is offline   Reply With Quote
Old 08-26-2012, 02:09 AM   #5
B_Cyrus
Banned User
 
Join Date: Jul 2011
Location: Yarmouk, Syria Valentine: Kushy
Posts: 9,438
My Ride: Malfouf
Is this freeway mileage or around town?
B_Cyrus is offline   Reply With Quote
Old 08-26-2012, 03:46 AM   #6
edz2003
Registered User
 
Join Date: Mar 2011
Location: MD
Posts: 148
My Ride: 2003 325ci
The boots Was replaced 2 yrs. Ago and in its both highway and city miles
edz2003 is offline   Reply With Quote
Old 08-26-2012, 03:57 AM   #7
swordsman11868
Registered User
 
Join Date: Aug 2006
Location: Las Vegas
Posts: 594
My Ride: 2003 325i
118k miles. 30 hwy. 21 city. About 24 mixed city/hwy.

Change your air filter if your mileage goes down. Or clean/oil your K&N if you have that.

.02
__________________
Crusaders - killing Takfiris since 1096 A.D.
swordsman11868 is offline   Reply With Quote
Old 08-26-2012, 07:30 AM   #8
Jagean
Registered User
 
Join Date: Aug 2012
Location: Florida
Posts: 24
My Ride: 2001 BMW 325i
I was getting 22 hwy/city mile, and that was before I found the oil leak and changed out the oe spark plugs and Valve cover (oil on the plugs). I also cleaned the ICV and TB. Hope mine goes up, we'll find out this week.

When you clean your ICV take the time to clean your Throttle body also. After your ICV is out, its only four bolts, and an electronic clip. The front of mine was not bad, but the back side was covered in grime to the point it was restricting movement. There is a orange rubber gasket on the back, make sure that is in good shape also.

Last edited by Jagean; 08-26-2012 at 07:37 AM.
Jagean is offline   Reply With Quote
Old 08-26-2012, 07:44 AM   #9
scrace
Registered User
 
Join Date: Aug 2006
Location: Maryland
Posts: 700
My Ride: 03.5 M3
Clean TB, DISA, and MAF sensor.

Replace air filter and spark plugs for starters.

I was getting 32 highway in my 325 but it was fully maintained.
__________________

2001 Topaz Blue 325Ci 64-120k miles SOLD
2003.5 Silver Gray M3 70k miles
scrace is offline   Reply With Quote
Old 08-26-2012, 08:40 AM   #10
Jagean
Registered User
 
Join Date: Aug 2012
Location: Florida
Posts: 24
My Ride: 2001 BMW 325i
32 mpg! nice, now I have something to shoot for. Before fixing stuff on our new car I was worried b/c the Bimmer got less mpg than my Camaro.
Jagean is offline   Reply With Quote
Old 08-26-2012, 08:50 AM   #11
aikmanson
Registered User
 
Join Date: Nov 2011
Location: Kingston/Cortland NY
Posts: 238
My Ride: 2000 323ci
119k 323ci 5 speed. 28 town / 34-35 highway. Maintenance is up to date and just replaced my fuel filter which gave me an extra 1.5 all around.

These are my average numbers to be honest, even with some spirited driving and high shifts.
__________________
2003 Jeep Wrangler Rubicon
2000 BMW 323ci
1995 Saab 900 SE - JZW Stage 4
aikmanson is offline   Reply With Quote
Old 08-26-2012, 09:08 AM   #12
sammk
Registered User
 
Join Date: Jan 2008
Location: Michigan
Posts: 378
My Ride: Bone-stock E92
Well.. Depends on whether we're talking about the OBC display or calculated based on miles and fuel fills.. The OBC usually over-predicts by 2-3 mpg.. Calculated, I used to get around 21-22 mpg city, 30-31 mpg hwy and around 23-24 mixed... A little more in the summer, a little less in the winter. '04 325i with 5-speed manual and around 80k..
__________________


E92 convert. BMW Fanatic.
sammk is offline   Reply With Quote
Old 08-26-2012, 09:21 AM   #13
Jagean
Registered User
 
Join Date: Aug 2012
Location: Florida
Posts: 24
My Ride: 2001 BMW 325i
My digital read outs don't actually work correctly. All I can see is mileage, time, and trip. I can't reset or anything, so I use the old method of, fill to the first click, drive, fill to first click, divide mileage by gallons.

/Sorry about thread jack?
Jagean is offline   Reply With Quote
Old 08-26-2012, 09:28 AM   #14
edz2003
Registered User
 
Join Date: Mar 2011
Location: MD
Posts: 148
My Ride: 2003 325ci
It's very difficult to located where I might be experiencing this as i've done numerous things and has not improved it! My next move is cleaning the ICV and see where that takes me I guess but my ride drives like a tank (slow and heavy)
edz2003 is offline   Reply With Quote
Old 08-26-2012, 09:29 AM   #15
sammk
Registered User
 
Join Date: Jan 2008
Location: Michigan
Posts: 378
My Ride: Bone-stock E92
Quote:
Originally Posted by Jagean View Post
My digital read outs don't actually work correctly. All I can see is mileage, time, and trip. I can't reset or anything, so I use the old method of, fill to the first click, drive, fill to first click, divide mileage by gallons.

/Sorry about thread jack?
Agreed, that's about as accurate as it gets.. And when you average that out for several tankfuls in a row, you get a good measure of the true mpg...
__________________


E92 convert. BMW Fanatic.
sammk is offline   Reply With Quote
Old 08-26-2012, 10:32 AM   #16
notsoworried
Registered User
 
Join Date: Jul 2012
Location: San antonio
Posts: 44
My Ride: 325i
Quote:
Originally Posted by sammk View Post
Agreed, that's about as accurate as it gets.. And when you average that out for several tankfuls in a row, you get a good measure of the true mpg...

Using this same method I clock 23mpg city 25 regular hwy. I took the tollway out of Austin back to San Antonio cruised about 90ish and clocked 26mpg.
notsoworried is offline   Reply With Quote
Old 08-26-2012, 11:15 AM   #17
Jagean
Registered User
 
Join Date: Aug 2012
Location: Florida
Posts: 24
My Ride: 2001 BMW 325i
Quote:
Originally Posted by edz2003 View Post
It's very difficult to located where I might be experiencing this as i've done numerous things and has not improved it! My next move is cleaning the ICV and see where that takes me I guess but my ride drives like a tank (slow and heavy)
Driving like a tank is not good, imo (for as little as it counts) it seems like your not getting enough of something: spark, gas, air (those are the easy ones to check). Make a check list, and take your time, also, check your codes anyways. My light doesn't come on, but it will still store codes. I just figured my light is burnt out.

also Edz, how long has this been going on?
Jagean is offline   Reply With Quote
Old 08-26-2012, 01:36 PM   #18
tock172
Beachtown Bill Collector
 
tock172's Avatar
 
Join Date: Jan 2011
Location: San Diego
Posts: 2,892
My Ride: '99 Techno Violet M3
Quote:
Originally Posted by edz2003 View Post
not getting a check enginee light for o2's!! Got 113k miles 2003 e46 coupe
Replace them anyway. They're worn out.
__________________


1999 Techno Violet Metallic BMW M3
2005 Audi B6 S4 quattro 6MT
2004 BMW 330i
1986 BMW 535i

tock172 is offline   Reply With Quote
Old 08-26-2012, 02:31 PM   #19
Goughie
Registered User
 
Join Date: Aug 2006
Location: Over the pond...
Posts: 564
My Ride: 330d Sport Touring
<<<<<<<<<<<<<<<<< comfortably gets 36mpg
__________________
http://i38.tinypic.com/oif03r.png
Sig is a BlownE30M3 production!

"The protection of views purely on religious grounds cannot be justified. It is not only an irrational idea, but it is also divisive, capricious and arbitrary" - Lord Justice Laws, UK 29/04/2010
Goughie is offline   Reply With Quote
Old 08-26-2012, 02:58 PM   #20
BBBoy323i
All show no go!
 
Join Date: Feb 2011
Location: Honolulu, HI
Posts: 2,464
My Ride: 2000 323i Black/Gray
Quote:
Originally Posted by aikmanson View Post
119k 323ci 5 speed. 28 town / 34-35 highway. Maintenance is up to date and just replaced my fuel filter which gave me an extra 1.5 all around.

These are my average numbers to be honest, even with some spirited driving and high shifts.
Dude teach me your ways. I get 16mpg city and 25 ish on highways. Gonna do a big tune up soon do hopefully that helps
__________________
 photo 01bea680-7313-4e36-9aab-9072b1a50daf_zps5308f8f8.jpg
BBBoy323i is online now   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Censor is ON





All times are GMT -5. The time now is 03:30 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use