BMW X3 Forum
BMW X3 Forum
Welcome to the ultimate BMW X3 community.
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
XBimmers | BMW X3 Forum BMW X3 and X4 Forums | F25 (2011 - 2017) | F26 (2014 - Current) Second Generation BMW X3 (F25) General Forum Poor MPG - X3 20d

Post Reply
 
Thread Tools Search this Thread
      07-05-2018, 03:34 PM   #1
Crassus
Second Lieutenant
United Kingdom
84
Rep
283
Posts

Drives: 16' F25 X3 xLine
Join Date: Sep 2015
Location: England

iTrader: (0)

Poor MPG - X3 20d

Hello
I am starting to question the fuel economy of my 2016 F25 X3 20d. This past weekend I did a 67 mile trip mostly on motorways and A-roads but only averaged 32mpg.

Last year I did a 465 mile trip with an average speed of 69mph but only averaged 34.1mpg. On the return journey the average speed was 55mph which barely improved the mpg which was 34.8mpg.

I am not expecting to hit the officially claimed 51-52mpg but was hoping for much better than 32-34mpg on long runs.

What are your thoughts?
__________________
My car:F25 2016 X3 xline Deep Sea Blue | Previous car: 2013 F30 320d Luxury

Last edited by Crassus; 07-05-2018 at 03:39 PM.
Appreciate 0
      07-05-2018, 05:27 PM   #2
Peter_R
Air Vice Marshall
Peter_R's Avatar
No_Country
102
Rep
1,022
Posts

Drives: X3 xDrive30d M Sport (F25)
Join Date: Nov 2014
Location: Somewhere in Blighty

iTrader: (0)

Quote:
Originally Posted by Crassus View Post
Hello
I am starting to question the fuel economy of my 2016 F25 X3 20d. This past weekend I did a 67 mile trip mostly on motorways and A-roads but only averaged 32mpg.

Last year I did a 465 mile trip with an average speed of 69mph but only averaged 34.1mpg. On the return journey the average speed was 55mph which barely improved the mpg which was 34.8mpg.

I am not expecting to hit the officially claimed 51-52mpg but was hoping for much better than 32-34mpg on long runs.

What are your thoughts?
You are not alone! Most likely culprit would be the unseasonably hot weather.

With air conditioning on constantly, it will hit the consumption hard. In traffic and also on motorways with average shade air temps around 30 degrees Centigrade and with tarmac it will get hotter. I have the 2013 F25 30d MSport and my normal long run average is above 37.0 mpg, at present I am getting around 32 mpg.
Appreciate 0
      07-05-2018, 10:47 PM   #3
Crassus
Second Lieutenant
United Kingdom
84
Rep
283
Posts

Drives: 16' F25 X3 xLine
Join Date: Sep 2015
Location: England

iTrader: (0)

Quote:
Originally Posted by Peter_R View Post
You are not alone! Most likely culprit would be the unseasonably hot weather.

With air conditioning on constantly, it will hit the consumption hard. In traffic and also on motorways with average shade air temps around 30 degrees Centigrade and with tarmac it will get hotter. I have the 2013 F25 30d MSport and my normal long run average is above 37.0 mpg, at present I am getting around 32 mpg.
Weather does have an affect but the 465 mile trip was done during December. I never drive in Eco mode as I find the lethargic throttle response outright dangerous.

Do you use it to achieve 37mpg?
__________________
My car:F25 2016 X3 xline Deep Sea Blue | Previous car: 2013 F30 320d Luxury
Appreciate 0
      07-06-2018, 01:59 AM   #4
Peter_R
Air Vice Marshall
Peter_R's Avatar
No_Country
102
Rep
1,022
Posts

Drives: X3 xDrive30d M Sport (F25)
Join Date: Nov 2014
Location: Somewhere in Blighty

iTrader: (0)

Quote:
Originally Posted by Crassus View Post
Weather does have an affect but the 465 mile trip was done during December. I never drive in Eco mode as I find the lethargic throttle response outright dangerous.

Do you use it to achieve 37mpg?
I used Eco mode a lot of the time last year. It was comfort and Eco where I achieved 37.4 mpg. Eco is not too lethargic on the 3 litre engine as it has bags of torque. I leave it in Comfort most of the time now.
Appreciate 0
      07-07-2018, 06:41 PM   #5
A1traveller
New Member
United Kingdom
0
Rep
15
Posts

Drives: 2017 F25 xdrive 20d M Sport
Join Date: Jun 2014
Location: Belfast

iTrader: (0)

I think it done to emissions and the EGR,
I had a 2014 2.0d LCI SE xdrive auto, and it always averaged 44mpg, and 50mpg on a long 400 mile run, then early 2017, a recall for a “product enhancement”, they replaced the EGR, the mpg dropped after that.
I now have from new, 2017 2.0d LCI M Sport Auto, and the MPG is always around 37mpg.
My conclusion is to do with the “dieselgate” scandal, and thefor the 2.0d was retuned for lower emissions and therefor, lower MPG.
I will be looking for a remap, that will do away with, or at least, use the EGR less, hence increasing the MPG, not after much more power, as I intend to drive the same.
Any body else agree with this theory ??
__________________
X3 Xdrive20d M Sport Auto,M Sport plus package, Media Professional Plus package, electric folding towbar, reverse camera, convenience access, HUD, Space Grey
Appreciate 0
      07-08-2018, 01:57 AM   #6
Peter_R
Air Vice Marshall
Peter_R's Avatar
No_Country
102
Rep
1,022
Posts

Drives: X3 xDrive30d M Sport (F25)
Join Date: Nov 2014
Location: Somewhere in Blighty

iTrader: (0)

Quote:
Originally Posted by A1traveller View Post
I think it done to emissions and the EGR,
I had a 2014 2.0d LCI SE xdrive auto, and it always averaged 44mpg, and 50mpg on a long 400 mile run, then early 2017, a recall for a “product enhancement”, they replaced the EGR, the mpg dropped after that.
I now have from new, 2017 2.0d LCI M Sport Auto, and the MPG is always around 37mpg.
My conclusion is to do with the “dieselgate” scandal, and thefor the 2.0d was retuned for lower emissions and therefor, lower MPG.
I will be looking for a remap, that will do away with, or at least, use the EGR less, hence increasing the MPG, not after much more power, as I intend to drive the same.
Any body else agree with this theory ??
Yes to a degree. Definitely the EGR. However, I would not remap anymore, because if you have an engine problem no matter however trivial, and BMW suspect you have had it done, they will not assist with any claim. I used to remap diesels all time, the last one being an E91 325d back in 2007.
Appreciate 0
      07-09-2018, 09:13 PM   #7
TEF
Private
20
Rep
97
Posts

Drives: 2016 X3 28d
Join Date: Jun 2017
Location: Western PA

iTrader: (0)

I own a US spec x3 28d or in short a 2 liter turbo diesel. As for mileage, I never experienced anything like 50 mpg, but have reached 39 to 40 mpg on secondary roads at about 55 mph. While I believe the mileage figures mentioned above, but they tend to come from drivers in the UK. I am wondering if a gallon of gas sold there is imperial gallons versus the ones dispensed here. Secondly, do BMW diesels sold in the UK use Diesel Emission Fluid (DEF) as required here? Would these two factors explain the mileage figures in the UK versus the US?
Appreciate 0
      07-10-2018, 01:31 AM   #8
Peter_R
Air Vice Marshall
Peter_R's Avatar
No_Country
102
Rep
1,022
Posts

Drives: X3 xDrive30d M Sport (F25)
Join Date: Nov 2014
Location: Somewhere in Blighty

iTrader: (0)

Quote:
Originally Posted by TEF View Post
I own a US spec x3 28d or in short a 2 liter turbo diesel. As for mileage, I never experienced anything like 50 mpg, but have reached 39 to 40 mpg on secondary roads at about 55 mph. While I believe the mileage figures mentioned above, but they tend to come from drivers in the UK. I am wondering if a gallon of gas sold there is imperial gallons versus the ones dispensed here. Secondly, do BMW diesels sold in the UK use Diesel Emission Fluid (DEF) as required here? Would these two factors explain the mileage figures in the UK versus the US?
One imperial gallon is equivalent to approximately 1.2 U.S. liquid gallons.

I own a late 2013 X3 xDrive 30d M Sport. That is the 3 litre, 256 BHP diesel.

The UK cars have a Diesel Particulate Filter (DPF) to control emissions.

The UK 2.0d has the same DPF.

Yesterday I did a 210 mile trip with mixed driving including some fast motorway sections to the Brecon Beacons and averaged 37.1 mpg. At one stage after around 100 miles it was averaging 41.1 and rising because I was driving on slow urban roads in ECO Pro mode.

Comparing UK & US Gallons and MPG figures using the same math:
The UK uses Imperial Gallons whereas the US Gallon is not the same.

If you were to travel 200 miles on 5 UK gallons you would average 40 mpg. 200/5 = 40
If you were to travel 200 miles on the same quantity of fuel but measured as 6 US gallons and expressed as a gallon you would average 33.33 mpg. 200/6 = 33.33

If you understand what I am saying? It is the same liquid quantity of fuel.

Last edited by Peter_R; 07-10-2018 at 03:17 AM.
Appreciate 0
      07-10-2018, 05:43 AM   #9
oVeRdOsE.
Private First Class
24
Rep
103
Posts

Drives: F25
Join Date: May 2018
Location: mtl

iTrader: (0)

wow I wish I have those mpg, 17.9 mpg here , 100% city tho.
35i
Appreciate 0
      07-10-2018, 05:59 AM   #10
Peter_R
Air Vice Marshall
Peter_R's Avatar
No_Country
102
Rep
1,022
Posts

Drives: X3 xDrive30d M Sport (F25)
Join Date: Nov 2014
Location: Somewhere in Blighty

iTrader: (0)

Quote:
Originally Posted by oVeRdOsE. View Post
wow I wish I have those mpg, 17.9 mpg here , 100% city tho.
35i
But of course that is the 3 litre (300 bhp) turbo charged petrol (gas guzzler) engine. You could not expect it too give you good mpg. Still that matters little in the US where fuel is relatively cheap as compared to the UK.
Appreciate 0
      07-10-2018, 06:13 AM   #11
oVeRdOsE.
Private First Class
24
Rep
103
Posts

Drives: F25
Join Date: May 2018
Location: mtl

iTrader: (0)

Quote:
Originally Posted by Peter_R View Post
But of course that is the 3 litre (300 bhp) turbo charged petrol (gas guzzler) engine. You could not expect it too give you good mpg. Still that matters little in the US where fuel is relatively cheap as compared to the UK.
haha yeah. More like 350bhp, stage 1
Appreciate 0
      07-10-2018, 05:02 PM   #12
gIzzE
Major General
gIzzE's Avatar
United Kingdom
203
Rep
5,615
Posts

Drives: Merc E350 cgi Estate + RR TDV8
Join Date: Apr 2006
Location: Norfolk, UK.

iTrader: (2)

Make sure your thermostats are working properly, should get to 91ºc within 10 minutes or so and then stick there rock solid.
The 'stats on these are useless and fail so quickly, if it is dropping down to 80ºc at all then your car overfuels as it thinks it is cold still, think old school choke.

Tyres make a big difference too, I used to get 37-38mpg on my 17" wheels with Bridgestones I think it was, changed to 19" with Pirelli P Zero all season expecting it to get worse and it actually got better, went up to 40mpg.

I'm sure a super efficient 225/50/17 tyres would see even better gains.
Appreciate 0
      07-11-2018, 07:19 AM   #13
TEF
Private
20
Rep
97
Posts

Drives: 2016 X3 28d
Join Date: Jun 2017
Location: Western PA

iTrader: (0)

Thanks for your response. I didn't realize that an imperial gallon was actually 20% larger than ours in the US. By that measure, my mpg figures are in line with those in the UK. Therefore, the addition of DEF into our pollution controls does not seem to detract from one's mpg numbers.
Appreciate 0
      07-11-2018, 07:49 AM   #14
Smithy2014
Second Lieutenant
25
Rep
214
Posts

Drives: X3 2.0d msport Auto
Join Date: Sep 2013
Location: Midlands

iTrader: (0)

My personal best in my 2.0d msport is 53.2mpg on a 100 mile round trip, my monthly average is around 44mpg. I tend to use ECO mode when on a motorway but normal mode when on anything else. Driving style has a lot to do with achieving good mpg - such as coasting to those red traffic lights that are 100 yards in front rather than accelerating and then hitting the brake pedal, quite often they will have changed to green before you reach them anyway.

I have noted a slight dip in mpg over the last month or so with the overly hot weather we have been having in blighty!
__________________
Now - LC1 20d Carbon Black
Gone - F25 20d Space Grey
Appreciate 0
      07-11-2018, 09:10 AM   #15
Crassus
Second Lieutenant
United Kingdom
84
Rep
283
Posts

Drives: 16' F25 X3 xLine
Join Date: Sep 2015
Location: England

iTrader: (0)

Quote:
Originally Posted by A1traveller View Post
I think it done to emissions and the EGR,
I had a 2014 2.0d LCI SE xdrive auto, and it always averaged 44mpg, and 50mpg on a long 400 mile run, then early 2017, a recall for a “product enhancement”, they replaced the EGR, the mpg dropped after that.
I now have from new, 2017 2.0d LCI M Sport Auto, and the MPG is always around 37mpg.
My conclusion is to do with the “dieselgate” scandal, and thefor the 2.0d was retuned for lower emissions and therefor, lower MPG.
I will be looking for a remap, that will do away with, or at least, use the EGR less, hence increasing the MPG, not after much more power, as I intend to drive the same.
Any body else agree with this theory ??
My EGR valve was replaced last month when the engine started experiencing odd episodes of stalling, judder after start up with a foot on the brake and loss of power.

MPG hasn't really improved since. Should I ask BMW for an engine remap?

Quote:
Originally Posted by Smithy2014 View Post
My personal best in my 2.0d msport is 53.2mpg on a 100 mile round trip, my monthly average is around 44mpg. I tend to use ECO mode when on a motorway but normal mode when on anything else. Driving style has a lot to do with achieving good mpg - such as coasting to those red traffic lights that are 100 yards in front rather than accelerating and then hitting the brake pedal, quite often they will have changed to green before you reach them anyway.

I have noted a slight dip in mpg over the last month or so with the overly hot weather we have been having in blighty!
That's impressive. Right now 50mpg+ is pure fantasy for me, let alone 40mpg.
__________________
My car:F25 2016 X3 xline Deep Sea Blue | Previous car: 2013 F30 320d Luxury
Appreciate 0
      07-13-2018, 06:47 AM   #16
Ol' Fart
New Member
Ol' Fart's Avatar
3
Rep
17
Posts

Drives: 2016 X3, 28d, Mineral White
Join Date: Apr 2017
Location: N/E Pennsylvania

iTrader: (0)

One thing I have noticed about my X3 is that it is very sensitive to tire pressure. A pound or two will affect my mileage. Around where I live my trips are usually around 20 miles of hilly 2 lane driving with speeds around 45 MPH. I average around 32 miles per gallon driving in sport mode. The best I've ever gotten was on a road trip to East Texas I averaged 39.7 miles per gallon. I never use ECO mode.
__________________
Doug

2013 BMW 535 XI, Alpine white, black Dakota interior.

2016 BMW X3, 28d, Mineral White metalic, Oyster Nevada leather interior.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


All times are GMT -5. The time now is 02:48 PM.




xbimmers
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST