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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 04-04-2013, 12:49 PM
alextj alextj is offline
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Hi How to increase fuel efficiency in E46

Hi I hope you can help me as always , my MPG its 21.9 all the time can you give some advises how to improve this MPG , 2001 325i and icredible 192.000 but runs good ... its old ¡ I know ¡ its my first BMW and I love it
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  #2  
Old 04-04-2013, 01:08 PM
geeek204 geeek204 is offline
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Is this MPG for highway, city, or combined driving? If it's for city, be happy because I don't think I've ever gotten 22 MPG with that type of driving. Try the simple things first and look for improvement, check to make sure your tires are inflated correctly (compare to sticker on driver's door sill) as well as turning off your AC.
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  #3  
Old 04-04-2013, 01:15 PM
alextj alextj is offline
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Mein Auto: 325i bmw 2001
21.9 on highway

Last edited by alextj; 04-04-2013 at 01:17 PM.
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  #4  
Old 04-04-2013, 01:19 PM
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Fast Bob Fast Bob is offline
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Quote:
Originally Posted by alextj View Post
Hi I hope you can help me as always , my MPG its 21.9 all the time can you give some advises how to improve this MPG , 2001 325i and icredible 192.000 but runs good ... its old ¡ I know ¡ its my first BMW and I love it
OK....let`s start at the beginning.

What method did you use to determine your average MPG ? (i.e., OBD display, manual calculations, ???)
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  #5  
Old 04-04-2013, 01:25 PM
TannerT TannerT is offline
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21.9 higway?? How many sparkplugs are in?

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  #6  
Old 04-04-2013, 01:42 PM
alextj alextj is offline
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I calculate I just got the car. I change oil and air filter Its my first bmw and I can see how the gas gauge move to the left soo fast when I drive to home or work feels like a 8 cil because I have a truck and spend almost same gas any advise for this inexperienced bmw owner thanks guys

I used OBD DISPLAY almost same with my calculate

Last edited by alextj; 04-04-2013 at 01:44 PM.
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  #7  
Old 04-04-2013, 02:09 PM
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Quote:
Originally Posted by alextj View Post
I calculate I just got the car. I change oil and air filter Its my first bmw and I can see how the gas gauge move to the left soo fast when I drive to home or work feels like a 8 cil because I have a truck and spend almost same gas any advise for this inexperienced bmw owner thanks guys

I used OBD DISPLAY almost same with my calculate
OK, it looks like you`re doing everything right. Most of us only get around 21 or 22 in mixed driving (of course, MANY of us have heavier-than-average right feet ). I suggest you fill up and take a nice long drive *at highway speeds* and see what kind of mileage you get then....
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  #8  
Old 04-04-2013, 02:32 PM
E46_Ci E46_Ci is offline
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In SoCal traffic, that sounds about right... I average 22-23 in mixed driving... as you can see below in my sig

I agree with Bob... get out on a long trip and see how it does.
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  #9  
Old 04-04-2013, 03:32 PM
alextj alextj is offline
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thanks guys I feel better knowing that I'm not so bad with my MPG anyway Ill change fuel filter use inyector cleaner techron NGK sparks and in the future change oxigen sensor lets see what happens
thanks again

Last edited by alextj; 04-04-2013 at 03:39 PM.
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  #10  
Old 04-04-2013, 09:54 PM
heztheone heztheone is offline
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u'r good don't worry, i'm getting avg 19 MPG, mostly due to ****ty gas we have
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  #11  
Old 04-04-2013, 10:39 PM
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Driving my motorcycle helps with my cars gas mileage...
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  #12  
Old 04-05-2013, 12:13 AM
e46_platform e46_platform is offline
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Driving my motorcycle helps with my cars gas mileage...
how so?
i think riding your motorbike helps your PERSONAL combined gas mileage
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  #13  
Old 04-05-2013, 12:19 AM
lgr122 lgr122 is offline
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how so?
i think riding your motorbike helps your PERSONAL combined gas mileage
But IF that's ALL you think about then you should always walk.
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  #14  
Old 04-05-2013, 03:19 AM
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If maintenance is up to date drive slower . 10mph slower saves a ton but takes the fun out of driving.
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  #15  
Old 04-05-2013, 08:54 AM
vandyboy vandyboy is offline
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I have the same car ('01 325i) and get 24 or 25 mpg in a mix of city and highway driving. So far, I have not replaced spark plugs, O2 sensors or anything mileage related. I do drive between 80-90 mph on the interstate, so its not like I am out doing Sunday driving on my commute. My last road trip (almost all interstate) yielded an mpg of 34 doing 80-90 mph. My saving grace is that I rarely hit the accelerator hard on take-offs.
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  #16  
Old 04-05-2013, 09:25 AM
lgr122 lgr122 is offline
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Originally Posted by av98 View Post
If maintenance is up to date drive slower . 10mph slower saves a ton but takes the fun out of driving.
Slower?

I don't feel like driving slow is some serious answer. I normally want to reach cruise speed (=speed limit + 10%) quickly, and try to avoid any unnecessary slow down.
Well, having right pressure in tires (or even tiny bit more than instructions say), and removing all extra junk from car can make some difference, just like in any other car.

Last edited by lgr122; 04-05-2013 at 09:47 AM.
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  #17  
Old 04-05-2013, 09:58 AM
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My 99 323i only gets 20mpg... just be happy
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  #18  
Old 04-05-2013, 12:17 PM
alextj alextj is offline
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Lightbulb

I heard something about increasing the tire pressure 35psi front and 40psi rear , what do you think about this guys ?

Last edited by alextj; 04-05-2013 at 12:28 PM.
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  #19  
Old 04-05-2013, 12:53 PM
jdauria jdauria is offline
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tire pressure
lose the spare in the trunk
shift sooner
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  #20  
Old 04-05-2013, 12:55 PM
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Dave 330i Dave 330i is offline
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Mein Auto:
I replaced the spare with a can of those stop leak stuff , most of the time, no passengers, just the driver.

BTW, my spare is still the original Conti Sports on a perfectly new M rims.
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  #21  
Old 04-05-2013, 01:35 PM
01tj 01tj is offline
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Mein Auto: E46 330i
My 330i gets 25-26 in mixed driving. Don't use the gas if you don't need to. If you can coast then coast, if you are approaching a stop light/sign let off the gas as soon as you see it. I usually set the CC at 75 on the interstate but if I were concerned about mpg's I'd stay at 65
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  #22  
Old 04-05-2013, 02:08 PM
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Quote:
Originally Posted by alextj View Post
I heard something about increasing the tire pressure 35psi front and 40psi rear , what do you think about this guys ?
Depends on what size tires you`re running.

I normally run 36 front and 38 rear in my staggered 18-inch setup.
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  #23  
Old 04-05-2013, 02:24 PM
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bmw330pp bmw330pp is offline
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I get 25-28 mpg mixed driving. I have a tornado in my intake though, which makes a big difference. Without the tornado, my OBC says 280 miles on a full tank. With it in, the OBC registers 360 miles on a full tank. I usually end up getting and honest 300-320 miles per tank.
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  #24  
Old 04-05-2013, 03:30 PM
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bmw330pp bmw330pp is offline
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Quote:
Originally Posted by e46_platform View Post
how so?
i think riding your motorbike helps your PERSONAL combined gas mileage
Lol, it does have that effect...but as long as its an improvement I have not issues...
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  #25  
Old 04-05-2013, 08:56 PM
alextj alextj is offline
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tornado? I heard something about this ! but does it really work bmw330pp ?
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