terrible mpg :(

paulcurtis · 01-30-2009, 05:52 AM

Quote:

Originally Posted by jinjur

I read somewhere that MAF's have a lifespan of 50K miles. Wonder how true that is and if it could be affecting me at 67K?

JJ

At the risk of sounding slightly dense: MAF? is that an Air Filter? or something more ominious?

paul

MEGA · 01-30-2009, 06:12 AM

Just flick to mpg on the in-dash display and hold the selector button down and it resets? Or is that not what you mean..

paulcurtis · 01-30-2009, 06:52 AM

Quote:

Originally Posted by MEGA

Just flick to mpg on the in-dash display and hold the selector button down and it resets? Or is that not what you mean..

Yes, that's what i meant - thanks!

paul

PeteJ · 01-30-2009, 02:29 PM

well i'm getting around 52/50 MPG on a round 30 mile trip which apx 60% motorway and 40% urban

on a full week of driving mix i'll get an average of about 48MPG.

I'm not heavy footed, the fuel bill means too much to me and i'm using Shell V-Power Diesel

J4MES · 01-30-2009, 03:48 PM

Mine does the same - dec 05 model so pre-ED also. Sounds about right - they're not that economical tbh. BMW checked mine too, it was fine. You might see 40 on a run. Mine got down to 25 when it was cold - keen driving and a/b roads mainly.

jinjur · 02-01-2009, 07:25 PM

HOLY DICK LIKE..................

Today we have hit 25 mpg aftre resetting the comp and doing some mixed driving.

TWENTY FIVE

WTHF?

Can the MAF be causing this? Can i test to see if it is faulty? How do i do that?

I know no error codes showed on the diag.

Also, i found a wee bit of oil in the inlet of my turbo (see piccy)....is that bad?

HELP

Jinj

SteveC · 02-02-2009, 03:29 AM

[LIST=1]

Stop and go commuting will give far worse consumption than published urban figures.
Multiple short trips kills mileage due to enrichment required for a cold engine
'Slow' acceleration is worse than 'fast' acceleration/cruise as any acceleration uses a lot of extra fuel. The time you are accelerating is more relevant to consumption than how hard.
Outside temperature has an effect on consumption. The cold weather will cost you a couple of MPG
The type of tyres you use and the pressure you run them at will also have an effect
Finally the quality of the diesel you use will also impact how far you can drive per gallon. Supermarket fuel is often inferior in the regard compared to premium brands

jinjur · 02-02-2009, 04:53 AM

So is the general concensus that there is nothing wrong with my car?

If i unplug the MAF sensor, should the car run better if it was faulty?

Jinj

NFS · 02-02-2009, 05:17 AM

Quote:

Originally Posted by jinjur

So is the general concensus that there is nothing wrong with my car?

If i unplug the MAF sensor, should the car run better if it was faulty?

Jinj

I think there is definitely something wrong with it.

I get 25mpg average in my 330i. With similar driving I managed 32mpg in my 530d.

25mpg in a 320d is very low.

Have you checked the old fashioned way ... i.e. brim the tank, zero the odometer, drive for a couple of days, brim it again and work out the mpg manually?

MOB · 02-02-2009, 06:55 AM

I get 420 miles or so from a full tank in the 330d

So if your MPG is correct, I would expect you to get around 300 or so???

If so you should get the car looked at - the fuel savings if there is a problem will pay for any repair!!

jinjur · 02-02-2009, 07:37 AM

Agreed,

Next step............brim it with GOOD diesel.........

Then see what the real world figures are.

Cheers
Jinj

JamesWood · 02-02-2009, 12:11 PM

Jinj,

I have similar issues. I’ve just picked up a 320d touring (Oct 05 plate) this weekend.
I noticed the fuel consumption was reading 27mpg (I was getting this on my Volvo 850 T-5) so I reset the computer. From driving around feathering the throttle I have now managed to eek out 33ish mpg.... early days tho I know.

One of the reasons the missus agreed to a new car was the better mpg....
I’d be interested to hear if you do any better mate!

Cheers

J

jinjur · 02-02-2009, 01:12 PM

Team effort it is then buster

I dont know.....just very disappointed. I really love the car but this MPG is terrible.......you can get ALOT more shove for 27MPG elsewhere.

JJ

J4MES · 02-02-2009, 02:15 PM

Mine will happily return 25 - I average about 30-35 (not much motorway/long distance stuff). They're not very economical. It's a heavy car, tuned to 160-odd bhp, pre-eD. The best I'll get is around 40 on a long, steady cruise. I was fairly disappointed too tbh.

But it's still a decent motor...

NFS · 02-02-2009, 02:46 PM

Quote:

Originally Posted by J4MES

Mine will happily return 25 - I average about 30-35 (not much motorway/long distance stuff). They're not very economical. It's a heavy car, tuned to 160-odd bhp, pre-eD. The best I'll get is around 40 on a long, steady cruise. I was fairly disappointed too tbh.

But it's still a decent motor...

I averaged around 38mpg in my 320cd and I have a heavy right foot.

CraigUK · 02-02-2009, 02:55 PM

Sorry to hijack the post slightly. Does the type of diesel you buy make that much difference? I have tried BP ultimate albeit only one tank and didn't really notice any difference from the supermarket fuel. To be honest at 15-20 pence more per litre there should me a big difference otherwise is it really justifiable? For the record I have a 320D Sport, E91 auto and I'm not as impressed as I might be. I did a 400 mile drive down to Plymouth the day I bought it and got 48mpg which was great. On my normal commute which has alot of dual carriageway in it I can squeeze 40mpg if I drive like a granny. I've also heard that diesels are worse in the cold, is this true? If so then this is the opposite of petrol engines that seem to thrive in cold weather.

J4MES · 02-02-2009, 04:26 PM

Quote:

Originally Posted by NFS

I averaged around 38mpg in my 320cd and I have a heavy right foot.

E92 pre-eD? Sounds good!

jinjur · 02-02-2009, 05:30 PM

seriously..............

NO BUT SERIOUSLY

What the dick is wrong with this?

beemerbird · 02-02-2009, 05:45 PM

Do you want to buy my car with that mpg

That's worse than my old 335d........seriously that needs checking out. Got to be worth the cost of paying for a diagnostic from an indie whatever.

tomacjoe36 · 02-02-2009, 05:47 PM

Before i changed my wheels and tyres i was averaging around 46.8mpg now im only getting 33.2 if im lucky

jinjur · 02-02-2009, 06:21 PM

Diagnostic shows nothing im afraid.............no errors

It was a BMW specialist though and not a dealership........

Much difference between 2 diagnostics?

lons · 02-02-2009, 08:16 PM

Hi JinJur. that mpg is absolute crap for a 163bhp E90. (my mate gets over 50 outa his 2006 model). Will be interesting to see the figures when the weather changes as the cold weather affects it badly. I'd get it checked out but why use a stealer if the car'sout of warranty. Maybe you should ask around and get a local, well respected independant to do the diagnostic - will cost you a lot less and probably do a more thorough job to boot. I'm averaging high 40s combined and I don't hang around although it's an ed model

01-30-2009, 06:12 AM	#24
MEGA Dieseasal 210 Rep 6,881 Posts Drives: LCI E92 335d M-Sport Join Date: Jan 2009 Location: Harrow, London iTrader: (2)	Just flick to mpg on the in-dash display and hold the selector button down and it resets? Or is that not what you mean.. __________________ Previously: 2003 Peugeot 206 1.6 8v \| 2006 E90 320d M-Sport, 19" BBS CH, Full Ice-cold JL audio install, August 2010 Total BMW 6 page feature car. \| 2003 Nissan 350Z GT Coupe 286BHP Now:2010 E92 LCI 335d M-Sport
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01-30-2009, 02:29 PM	#26
PeteJ Diesel Head 12 Rep 550 Posts Drives: 320d M Sport Convertible E93 Join Date: Dec 2008 Location: Edinburgh iTrader: (0)	well i'm getting around 52/50 MPG on a round 30 mile trip which apx 60% motorway and 40% urban on a full week of driving mix i'll get an average of about 48MPG. I'm not heavy footed, the fuel bill means too much to me and i'm using Shell V-Power Diesel
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01-30-2009, 03:48 PM	#27
J4MES my name is James 15 Rep 71 Posts Drives: '09 E91 LCI 330d M-Sport Join Date: Oct 2008 Location: Behind you... iTrader: (0)	Mine does the same - dec 05 model so pre-ED also. Sounds about right - they're not that economical tbh. BMW checked mine too, it was fine. You might see 40 on a run. Mine got down to 25 when it was cold - keen driving and a/b roads mainly. __________________ 330d LCI M-Sport Touring f/s - PM for details
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02-01-2009, 07:25 PM	#28
jinjur yes....spelt with J's 61 Rep 963 Posts Drives: F31 325D MSport Join Date: Jan 2009 Location: NoRtH eYeLaNd iTrader: (0)	HOLY DICK LIKE.................. Today we have hit 25 mpg aftre resetting the comp and doing some mixed driving. TWENTY FIVE WTHF? Can the MAF be causing this? Can i test to see if it is faulty? How do i do that? I know no error codes showed on the diag. Also, i found a wee bit of oil in the inlet of my turbo (see piccy)....is that bad? HELP Jinj Attached Images
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02-02-2009, 03:29 AM	#29
SteveC Major 219 Rep 1,233 Posts Drives: M5 Join Date: Jan 2009 Location: North East iTrader: (1)	[LIST=1] Stop and go commuting will give far worse consumption than published urban figures. Multiple short trips kills mileage due to enrichment required for a cold engine 'Slow' acceleration is worse than 'fast' acceleration/cruise as any acceleration uses a lot of extra fuel. The time you are accelerating is more relevant to consumption than how hard. Outside temperature has an effect on consumption. The cold weather will cost you a couple of MPG The type of tyres you use and the pressure you run them at will also have an effect Finally the quality of the diesel you use will also impact how far you can drive per gallon. Supermarket fuel is often inferior in the regard compared to premium brands
	Appreciate 0 Quote

02-02-2009, 04:53 AM	#30
jinjur yes....spelt with J's 61 Rep 963 Posts Drives: F31 325D MSport Join Date: Jan 2009 Location: NoRtH eYeLaNd iTrader: (0)	So is the general concensus that there is nothing wrong with my car? If i unplug the MAF sensor, should the car run better if it was faulty? Jinj
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02-02-2009, 06:55 AM	#32
MOB Major 60 Rep 1,413 Posts Drives: Alpine White M2 LCI Join Date: Dec 2007 Location: Northants UK iTrader: (4)	I get 420 miles or so from a full tank in the 330d So if your MPG is correct, I would expect you to get around 300 or so??? If so you should get the car looked at - the fuel savings if there is a problem will pay for any repair!! __________________
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02-02-2009, 07:37 AM	#33
jinjur yes....spelt with J's 61 Rep 963 Posts Drives: F31 325D MSport Join Date: Jan 2009 Location: NoRtH eYeLaNd iTrader: (0)	Agreed, Next step............brim it with GOOD diesel......... Then see what the real world figures are. Cheers Jinj
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02-02-2009, 12:11 PM	#34
JamesWood New Member 0 Rep 14 Posts Drives: 320d M Sport Touring Join Date: Jan 2009 Location: Hartley Wintney iTrader: (0)	Jinj, I have similar issues. I’ve just picked up a 320d touring (Oct 05 plate) this weekend. I noticed the fuel consumption was reading 27mpg (I was getting this on my Volvo 850 T-5) so I reset the computer. From driving around feathering the throttle I have now managed to eek out 33ish mpg.... early days tho I know. One of the reasons the missus agreed to a new car was the better mpg.... I’d be interested to hear if you do any better mate! Cheers J
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02-02-2009, 01:12 PM	#35
jinjur yes....spelt with J's 61 Rep 963 Posts Drives: F31 325D MSport Join Date: Jan 2009 Location: NoRtH eYeLaNd iTrader: (0)	Team effort it is then buster I dont know.....just very disappointed. I really love the car but this MPG is terrible.......you can get ALOT more shove for 27MPG elsewhere. JJ
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02-02-2009, 02:15 PM	#36
J4MES my name is James 15 Rep 71 Posts Drives: '09 E91 LCI 330d M-Sport Join Date: Oct 2008 Location: Behind you... iTrader: (0)	Mine will happily return 25 - I average about 30-35 (not much motorway/long distance stuff). They're not very economical. It's a heavy car, tuned to 160-odd bhp, pre-eD. The best I'll get is around 40 on a long, steady cruise. I was fairly disappointed too tbh. But it's still a decent motor... __________________ 330d LCI M-Sport Touring f/s - PM for details
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02-02-2009, 02:55 PM	#38
CraigUK Captain 133 Rep 641 Posts Drives: F11 LCI 520D Sport Tourer Join Date: Jan 2009 Location: Durham iTrader: (0)	Sorry to hijack the post slightly. Does the type of diesel you buy make that much difference? I have tried BP ultimate albeit only one tank and didn't really notice any difference from the supermarket fuel. To be honest at 15-20 pence more per litre there should me a big difference otherwise is it really justifiable? For the record I have a 320D Sport, E91 auto and I'm not as impressed as I might be. I did a 400 mile drive down to Plymouth the day I bought it and got 48mpg which was great. On my normal commute which has alot of dual carriageway in it I can squeeze 40mpg if I drive like a granny. I've also heard that diesels are worse in the cold, is this true? If so then this is the opposite of petrol engines that seem to thrive in cold weather.
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02-02-2009, 05:30 PM	#40
jinjur yes....spelt with J's 61 Rep 963 Posts Drives: F31 325D MSport Join Date: Jan 2009 Location: NoRtH eYeLaNd iTrader: (0)	seriously.............. NO BUT SERIOUSLY What the dick is wrong with this? Attached Images
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02-02-2009, 05:45 PM	#41
beemerbird Major General 179 Rep 7,953 Posts Drives: Merc diesel Join Date: Oct 2007 Location: Yorkshire iTrader: (0) Garage List 2010 TTRS [9.00] 2007 Audi S5 [0.00] May 2007 Porsche 99 ... [0.00] March 2007 Porsche ... [0.00] Sep. 2007 E92 335d SE [0.00] July 2006 E90 330i ... [0.00]	Do you want to buy my car with that mpg That's worse than my old 335d........seriously that needs checking out. Got to be worth the cost of paying for a diagnostic from an indie whatever.
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02-02-2009, 05:47 PM	#42
tomacjoe36 New Member 1 Rep 21 Posts Drives: BMW 320D M-SPORT Join Date: Jul 2007 Location: Scotland iTrader: (0)	Before i changed my wheels and tyres i was averaging around 46.8mpg now im only getting 33.2 if im lucky __________________
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02-02-2009, 06:21 PM	#43
jinjur yes....spelt with J's 61 Rep 963 Posts Drives: F31 325D MSport Join Date: Jan 2009 Location: NoRtH eYeLaNd iTrader: (0)	Diagnostic shows nothing im afraid.............no errors It was a BMW specialist though and not a dealership........ Much difference between 2 diagnostics?
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02-02-2009, 08:16 PM	#44
lons Lons 10 Rep 383 Posts Drives: 320d M Sport edition - carbon Join Date: Jan 2009 Location: Northumberland iTrader: (0)	Hi JinJur. that mpg is absolute crap for a 163bhp E90. (my mate gets over 50 outa his 2006 model). Will be interesting to see the figures when the weather changes as the cold weather affects it badly. I'd get it checked out but why use a stealer if the car'sout of warranty. Maybe you should ask around and get a local, well respected independant to do the diagnostic - will cost you a lot less and probably do a more thorough job to boot. I'm averaging high 40s combined and I don't hang around although it's an ed model __________________
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