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 > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 09-24-2008, 12:02 PM   #1
kinsella
Registered User
 
Join Date: Jan 2007
Location: england
Posts: 52
My Ride: m3 covertible
2002 cab auto 330ci low mpg problem

Hi All

Ive owned in the past a 330ci coupe and 2 M3's ive since bougt a house now and gone back to the 330ci.

I have noticed i'm only getting roughly 20 max MPG. Ive just bought the car and noticed im using quite a bit more petrol than i did in the M3.

The car has done 70K and on aftermarket 19" wheels so i would expect to use a little more.

I'm wondering if I chnage the spark plugs, air filter, fuel filter and possibly ran some RED EX through it would it help me in any way ?

Many thanks, Ben
kinsella is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 09-24-2008, 03:25 PM   #2
simsima325
'a certain moderator'
 
simsima325's Avatar
 
Join Date: Feb 2001
Location: Hyattsville, MD
Posts: 37,783
My Ride: Honda Civic
Those things can only help efficiency, but i think its normal MPG considering its auto, a heavy cab, with heavy 19's
__________________
-Brendan
simsima325 is offline   Reply With Quote
Old 09-25-2008, 02:15 AM   #3
mkodama
Registered User
 
mkodama's Avatar
 
Join Date: Oct 2006
Posts: 33,171
Reasonable mileage. You lose some efficiency through the torque converter and extra drivetrain loss of an automatic, the extra weight of the folding top and extra frame stiffening hurt mileage a little, as do heavier larger diameter wheels as Brendan all mentioned.

Keeping your car in good working order isn't too expensive and is worth a few mpg more. Probably making up for the maintenance with gas prices in the UK.

The OEM paper air filters (the best) last between 15,000 and 30,000 miles depending on the dust and other particulate matter in the air. Fuel filters usually are good for 60,000 miles. Depending on what type of spark plugs you have, they should last between 30,000 and 60,000 miles, probably a bit longer if you have the more expensive 4 prong types. Oil is best changed every 7500 miles, oil filter is changed along with it. Try to use an oil with BMW approval as this is the best for protection and mileage. And lastly, make sure your thermostat is in working order. I think average lifespan of these is like 60,000 miles. When they slowly fail, you don't always get any messages, but they fail in the partway open position prolonging warm up times, which causes your engine to use more gas.
__________________

mkodama is offline   Reply With Quote
Old 10-04-2008, 06:03 PM   #4
kevs01
Registered User
 
Join Date: Oct 2006
Location: n
Posts: 30
My Ride: n
hi ben


ive got a 2003 e46 330ci auto and i only get around 20mpg if driving normal and i do mostly urban. on a run it goes to around 30mpg and if driven hard then it drops to 15mpg hope this helps.

forgot to mention its totally standard
kevs01 is offline   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 Off
Censor is OFF





All times are GMT -5. The time now is 11:23 AM.


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