M5 fuel consumption

[Julian64]

Work route, 4 miles of country lanes, 16 miles of M25/A2 with stop start on A2 due to closing of blackwall tunnel

MPG from ignition switch on was 27.4mpg. Now who was it that said I be lucky to see twenty?

[granville]

Julian,

Are you sure you havcen't been sold a 530d with M badges?

I very nearly got to Portsmouth on a tank in September but other than that, the trip average seems to be stuck on 19.4, which is perfectly acceptable given the Jackyl & Hyde nature of my commute (mornings = barely waken 60mph crawl v. evening stress busting 'enthusiasm!')

[Julian64]

Nope, but I was seeing what mpg I could do so my right foot was lighter than a butterfly fart.
If not for the traffic I rekon I could have got close to 30!!!!!

Although the car keeps signalling a tyre defect. Even when holding in the reset button it waits a while and then repeats the tyre defect warning. All tyres seem to have equal pressure.

I will hoon tonight and see how low I can go, rev counter lights permitting.

Have to ever tried a journey with full restraint derestrictor, or is that the full blooded bavarian charge MPG?

[stuh]

Julian64 said:

Nope, but I was seeing what mpg I could do so my right foot was lighter than a butterfly fart. If not for the traffic I rekon I could have got close to 30!!!!! Although the car keeps signalling a tyre defect. Even when holding in the reset button it waits a while and then repeats the tyre defect warning. All tyres seem to have equal pressure. I will hoon tonight and see how low I can go, rev counter lights permitting. Have to ever tried a journey with full restraint derestrictor, or is that the full blooded bavarian charge MPG?

Julian we had excatly the same with the tyre defect warning. Two dealers checked and reset, told all OK. A day later the right rear blew out on the M20

Mysteriously light now stays off after 4 new tyres fitted!

[granville]

Ah yes, the tyre defect light - glad it's not just me!

Julian, I find the M5 quite impossible to not exploit on quiet m-ways, i.e. every night on t'way home.

Like so many modern cars, not just performancey ones, it renders the NSL completely defunct.

Must say, there's a part of me that is beginning to hanker after a B10 (4.8); almost all the M5's speed with (I think) more torque and auto which for most of my driving, would be ideal.

Depends whether I could get more than £12 for the M car!

[ScoobyZoom]

derestrictor said:

Must say, there's a part of me that is beginning to hanker after a B10 (4.8); almost all the M5's speed with (I think) more torque and auto which for most of my driving, would be ideal.

M5 kicks the stuffing out of them.

derestrictor said:

Depends whether I could get more than £12 for the M car!

I'll give you £13

[dazren]

ScoobyZoom said:

derestrictor said: Depends whether I could get more than £12 for the M car! I'll give you £13

DeR, don't do anything silly like selling the beemer without speaking to me first.

DAZ

[Zod]

27 mph from an M5! I never used to get more than 20.5 mphg from my M3s and I get 21.5 from the CSL (presumably due to the lighter weight). Have managed to get it down to 8 on track.

[m-five]

Zod said:

27 mph from an M5! I never used to get more than 20.5 mphg from my M3s and I get 21.5 from the CSL (presumably due to the lighter weight). Have managed to get it down to 8 on track.

Obviously not trying hard enough - got an e34 M5 down to 5mpg at Anglesey!

Can get it up to 35mpg with VERY careful driving (i.e. 50mph slipstreaming behind HGVs).

[Julian64]

stop start all the way in to work this morning. This would have seen by 850 at about 12mpg. 21mpg in the M5. Obviously depends on your perspective but in my world this is a frugal car for the power. I have done this journey many many times and in the various cars in this type of traffic which is unfortunately the norm.
heavy stop/start clear road
TVR Cerb 14-16 20-22
BMW 850i 12-14 18-20
Cobra <10. <20
M5 21 ??
328 Touring 25 34

[tuscanboy]

I'm not convinced about the reading reported on the fuel computer. It seems to regularly indicated early 20's even with some enthusiastic driving. The real measure is how many miles you get from a tank and it rarely gets above 250 and was 223 last time. I have only done the maths roughly in my head as I drive away from the petrol station, but don't have the nerve to get the calculator out when I get home !!!

[granville]

tuscanboy said:

...how many miles you get from a tank and it rarely gets above 250 and was 223 last time.

Ditto: it's a ruddy great slurper of the first order.

[Julian64]

tuscanboy said:

I'm not convinced about the reading reported on the fuel computer. It seems to regularly indicated early 20's even with some enthusiastic driving. The real measure is how many miles you get from a tank and it rarely gets above 250 and was 223 last time. I have only done the maths roughly in my head as I drive away from the petrol station, but don't have the nerve to get the calculator out when I get home !!!

Agreed, the only true reading is after a fillup.

[Julian64]

First fillup. Calculated at 25 mpg which is spot on what the long term fuel consumption says.

This cars is amazing. If travel down every motorway at 65 I get 32.4 mpg!!! A painful journey but incredible fuel efficiency for that car.

So very very impressed with the double vanos. Bloody good work BMW

Here endeth the fuel consuption thread on my M5. Its time to be naughty .