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April 17, 2018, 01:03:50 PM

Rassi

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Fuel consumption M50D
« on: April 17, 2018, 01:03:50 PM »
I like my M50D more and more, and find it a very complete car that does everything well and just a "feel good" kind of car.

However, one surprise is the fuel consumption, which at 12 litres/100 km (= 23.5 mpg) over the last 2000 km is quite poor, and so far off the claimed 41 mpg that it is not even funny.

It has been a mixture of 70 % fast(ish) motorway duties (cruising 150 - 160 kph) and city driving. It equates to a range of about 700 km.

It is not far off what my F10 M5 was doing on the same kind of driving, which is a bit of joke considering that's performance.

Airfilter changed 5000 km ago, on 20" runflat tyres. I accept that a heavy SUV with 381 bhp will never be that economical but still was expecting 26-29 mpg on a run.

Anyone experiencing the same, or do I have a problem?
‘17 Alfa Romeo Giulia Quadrifoglio
ex '15 BMW X5 M50D
ex'14 BMW M5
ex '08 BMW Z4 Coupe
ex '14 Audi A6 Avant 3.0 BiTDI
ex '11 BMW M3 DCT
ex '11 BMW X3 30D
ex '07 BMW M5
ex '08 BMW X3 35D
ex '02 BMW M5
ex '98 Mercedes C43 T AMG        
ex '99 BMW M Coupe
ex '93 Alfa Romeo 164 24V

April 17, 2018, 03:29:35 PM
Reply #1

X5M50d

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Re: Fuel consumption M50D
« Reply #1 on: April 17, 2018, 03:29:35 PM »
Yours does sound low?
Had mine for about a year now and my average over 13k miles is just over 30mpg.
On my daily 25 mile work commute across A and B roads (average 27 mph) I'm getting between 30 and 33 mpg on the 21" summer run flats and up to 35mpg on the 20" winter non Run flats.
So a vast difference.
Drove to the Swiss Alps in February (750miles each way) fully loaded and was getting 30mpg on average 60-70mph.

April 17, 2018, 03:50:24 PM
Reply #2

kenniff

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Re: Fuel consumption M50D
« Reply #2 on: April 17, 2018, 03:50:24 PM »
I suppose it depends on what kind of driving you are doing ... and how you drive it. :)

Most of my driving is quite sedate, but I do lots of short journeys crawling or sitting still in traffic. When on the motorway and the roads do open up I dont like to hang about and the aerodynamics of a brick on wheels have a huge effect once you get past a certain speed. You mention cruising at 90-100 mph and at that speed the mpg nosedives.

So in short, 23.5 sounds normal to me.
Current: F15 M50d Msport in Carbon Black
Previous: F15 30d Msport in Space Grey, E70 35d Msport, BMW 530i, Porsche Boxster, BMW 330Ci Sport and before that Vectra GSi, Chevrolet Lumina, Vauxhall Astras

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April 17, 2018, 04:28:13 PM
Reply #3

bimjim

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Re: Fuel consumption M50D
« Reply #3 on: April 17, 2018, 04:28:13 PM »
I'm averaging just over 30mpg too. That's with mostly longer runs, not much town/city driving.
Current: 2015 F15 X5 M50d
Previous: 2007 E70 X5 4.8 M Sport

April 17, 2018, 04:44:46 PM
Reply #4

Rassi

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Re: Fuel consumption M50D
« Reply #4 on: April 17, 2018, 04:44:46 PM »
Thanks. Will have a 450 km motorway journey Thursday, will see what that does, but probably right that the weight, 4 WD, 20" steamrollers and aerodynamics and elevated cruising speed all conspire to low MPG. Just a bit of an eye opener that it is that far from the claimed figures, and that close to those of a 560 bhp M5.
‘17 Alfa Romeo Giulia Quadrifoglio
ex '15 BMW X5 M50D
ex'14 BMW M5
ex '08 BMW Z4 Coupe
ex '14 Audi A6 Avant 3.0 BiTDI
ex '11 BMW M3 DCT
ex '11 BMW X3 30D
ex '07 BMW M5
ex '08 BMW X3 35D
ex '02 BMW M5
ex '98 Mercedes C43 T AMG        
ex '99 BMW M Coupe
ex '93 Alfa Romeo 164 24V

April 17, 2018, 07:38:30 PM
Reply #5

X5Sport

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Re: Fuel consumption M50D
« Reply #5 on: April 17, 2018, 07:38:30 PM »
Real world figures are typically 25-30% below test data which is why the new WLTP test cycle is coming in now.
:type: Never anthropomorphise computers. They hate that.

April 17, 2018, 08:14:06 PM
Reply #6

IanP

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Re: Fuel consumption M50D
« Reply #6 on: April 17, 2018, 08:14:06 PM »
Try pegging it back to 110-120 kph, makes a huge difference with my M, which also has the aerodynamics of a small house.

April 17, 2018, 08:14:21 PM
Reply #7

Dogzyboy

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Re: Fuel consumption M50D
« Reply #7 on: April 17, 2018, 08:14:21 PM »
I’m at an average of 29mpg after 3000 miles. That’s the car reading so probably a bit generous.

April 17, 2018, 08:28:20 PM
Reply #8

Horizon

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Re: Fuel consumption M50D
« Reply #8 on: April 17, 2018, 08:28:20 PM »
In an other M 50d post where someone was asking if he should buy a 12 month old X5 50d with 1K miles on it for £25 K less than it was new, £25 per mile depreciation😬😬😬😬
Fuel consumption would be the least of my concerns 😀



2011 Kia Sorento KX3  2.2D 60 Plate Auto in black ( mine )
BMW E83 X3.  3.0d M Sport, 2008 in black ( now gone )
Honda CRV 2.2 d EX SUV 2011 in Silver. ( Wife's )
BMW E93 330i Convertible  Msport  2007.  ( Now sold )
VW Golf 2.0 TDI 140 GT 2010 ( now sold )
Now Sold 55 plate, X5, 3.0 D Sport. Silv

April 17, 2018, 08:55:00 PM
Reply #9

Dogzyboy

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Re: Fuel consumption M50D
« Reply #9 on: April 17, 2018, 08:55:00 PM »
In an other M 50d post where someone was asking if he should buy a 12 month old X5 50d with 1K miles on it for £25 K less than it was new, £25 per mile depreciation😬😬😬😬
Fuel consumption would be the least of my concerns 😀

 :))

April 18, 2018, 02:42:22 AM
Reply #10

Am89

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Re: Fuel consumption M50D
« Reply #10 on: April 18, 2018, 02:42:22 AM »
I’ve driven the m50d I’m considering buying a few times and mpg seems poor for a Diesel - Even tho it’s fast for such a big car. Power also seems very on / off

April 18, 2018, 08:21:56 AM
Reply #11

Rassi

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Re: Fuel consumption M50D
« Reply #11 on: April 18, 2018, 08:21:56 AM »
In an other M 50d post where someone was asking if he should buy a 12 month old X5 50d with 1K miles on it for £25 K less than it was new, £25 per mile depreciation😬😬😬😬
Fuel consumption would be the least of my concerns 😀

Of course, these cars are not a solid gold investment (but apart from Porsche 964, 993, GT3s and BMW E30 M3, what are) so it is not a question of economic "concern", more that I wanted to know if this kind of consumption was normal for the car, or if I actually have a problem (DPF, EGR, three turbos, you name it) - I am very familiar with high consumption having owned an E60 M5 and E92 M3, but at least the X5 has a decent sized fuel tank that allows for an acceptable range.

I appreciate that speed is probably one of the main reasons, but it is used predominantly for European motorway cruising (France and Germany), where speed is higher than UK, so that's just the way it is.

There is an interesting youtube video of a 40d and the consumption at different speed intervals, and clearly the aerodynamics are killing it. https://www.youtube.com/watch?v=Bh_pB9ZOaQg&t=67s
‘17 Alfa Romeo Giulia Quadrifoglio
ex '15 BMW X5 M50D
ex'14 BMW M5
ex '08 BMW Z4 Coupe
ex '14 Audi A6 Avant 3.0 BiTDI
ex '11 BMW M3 DCT
ex '11 BMW X3 30D
ex '07 BMW M5
ex '08 BMW X3 35D
ex '02 BMW M5
ex '98 Mercedes C43 T AMG        
ex '99 BMW M Coupe
ex '93 Alfa Romeo 164 24V

April 18, 2018, 08:55:43 AM
Reply #12

X5M50d

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Re: Fuel consumption M50D
« Reply #12 on: April 18, 2018, 08:55:43 AM »
Its such a great fun car to drive and for its size the power is just great.
It does everything you want it to do and carries 5-7 people with a full load with ease.
I have no regrets in buying it and would recommend to anyone.
Spending so much money on one, there should be no reason to be concerned with the mpg.

April 18, 2018, 09:41:43 AM
Reply #13

kenniff

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Re: Fuel consumption M50D
« Reply #13 on: April 18, 2018, 09:41:43 AM »
I found this on the net:
http://bioage.typepad.com/.shared/image.html?/photos/uncategorized/autobild1.png

and whilst none of the cars are quite as brick shaped as the X5, the message is pretty clear - your fuel economy will improve by at least 33% if you slow down from 100 mph to 80 mph. That would put your 23.5 mpg up to 31.3.

If you really want to watch the needle head south in real time try putting a couple of bikes on the roof. I did that for a 450 mile journey once and it nearly made me cry!

I'm not suggesting you change your driving habits at all, just suggesting that there's probably nothing wrong with your car mechanically. Enjoy!
Current: F15 M50d Msport in Carbon Black
Previous: F15 30d Msport in Space Grey, E70 35d Msport, BMW 530i, Porsche Boxster, BMW 330Ci Sport and before that Vectra GSi, Chevrolet Lumina, Vauxhall Astras

It'll be allright in the end. If it isn't allright it isn't the end

April 18, 2018, 09:45:22 AM
Reply #14

kenniff

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Re: Fuel consumption M50D
« Reply #14 on: April 18, 2018, 09:45:22 AM »
In an other M 50d post where someone was asking if he should buy a 12 month old X5 50d with 1K miles on it for £25 K less than it was new, £25 per mile depreciation😬😬😬😬
Fuel consumption would be the least of my concerns 😀

On the depreciation point, its probably worth bearing in mind that the original purchaser may well have achieved the typical 22% discount on the purchase price. That means they may have paid 58.5k for a £75K motor. On those numbers, his depreciation is not so huge.....
Current: F15 M50d Msport in Carbon Black
Previous: F15 30d Msport in Space Grey, E70 35d Msport, BMW 530i, Porsche Boxster, BMW 330Ci Sport and before that Vectra GSi, Chevrolet Lumina, Vauxhall Astras

It'll be allright in the end. If it isn't allright it isn't the end