[Diesel Flash]

Originally Posted by CraigUK

Just a brief post to ask what MPG those of you with 520D's are getting. I've got an F11 tourer and for a car that weights 1.8 tonnes I'm amazed at the fuel consumption.

63.7MPG from a cold start this morning on my commute which is about 80% dual carriageway. Heated seats and other gizmos draining power too

[IMG]

i get around 30-35mpg average and maybe touch 40 on a real long run in my 2011 f11, seems really poor in comparison to others that have commented.
but as said its nearly a 2ton lump with me in it.

plus i was wondering whether the 20's i have fitted would have any affect on the on board calculations??

not yet worked out a full to empty tank but getting usually 550miles ish.


Still would never go back to the 3 now though

[gIzzE]

Originally Posted by Diesel Flash

plus i was wondering whether the 20's i have fitted would have any affect on the on board calculations??

No, but they will ruin the MPG.

I wet from 225.50.17s on my wife's 3 series touring to 275.30.19 rear and 245.55.19 fronts and the MPG dropped from 48 average to around 39.

Rolling resistance is an MPG killer.

[CraigUK]

I've certainly noticed that makes car feels more sprightly on 17" winters than my 18" summers. MPG is also quite a bit better. With that in mind 20" I would imagine would be a fair bit worse.

[Diesel Flash]

Originally Posted by gIzzE

No, but they will ruin the MPG.

I wet from 225.50.17s on my wife's 3 series touring to 275.30.19 rear and 245.55.19 fronts and the MPG dropped from 48 average to around 39.

Rolling resistance is an MPG killer.

yup, guess those 275's arent doing me any favors either

[DDarkEnergy]

Tyre size makes a small difference in the mpg according to BMW.
http://www.bmw.com/com/en/newvehicle...el_engines.pdf

[MrPogle]

It's looks like about 5% per extra inch due to mechanical effects. I do wonder about the psychological effects, though. Does driving about on your brand-new, bad-ass wheels subtly alter your driving style also?

[Pottsy]

I tend to drive slower on my horrible road rollers, because the ride is worse.

Nice pic, from a few years ago:

[jabroni80]

2011 F11 520d I get 30mpg around town and high 40s on motorway runs.

One note my Idrive always gives a far more generous value than the real figures.

Figures above are actually what I get not the mpg figures from Idrive.