18.7 MPG in my Z4C 3.0si

[Z4MCSL]

since owning my Z4C I have barely taken it anywhere other than the painfully speed bump populous roads of south London.

As well as being generally incredibly frustrating (and causing me to worry if short journeys are bad for the engine) I am now returning an average 18.7 MPG...


Is this normal
Am I clearly too throttle happy

[hilly10]

Even booting my 3.0si Roadster I used to get 25mpg and on a run down the Mway it would clear 38ish

[aquarianone]

That's seems pretty damn low, I get a pretty consistent 28mpg in general mixed driving and high 30's on a long motorway run...

Perhaps time for a service, change of plugs, get a fault code reader and see if there's an issue's being logged...

Maybe ask in here as well - http://z4-forum.com/forum/viewforum.php?f=3&si...

[helix402]

Given the use it sounds normal.

[bmwmike]

Seems normal to me. Assuming n52. I get anything from 14mpg to 24mpg on my pottering about urban trips in my n53 f10. The shorter the trip the lower the mpg, obvs.

If no codes and it's not overdue a service I'd not worry.

[trickywoo]

helix402 said:

Given the use it sounds normal.

Yup.

Anything short of prolonged steady running will really hurt mpg. I get 30mpg+ from a 4.5l v8 on even a fast motorway run but 20mpg driving very smoothly round town.

[soad]

Rev it some more!!

Traffic jams, endless traffic lights, slow moving vehicles...

[Mr Whippy]

You neeed to drive it more genitally.

[TR4man]

Seems about right in the circumstances.

[talksthetorque]

Hit the sport button. Counter intuitively, there are many reports that it improves economy.

[Prinny]

Mr Whippy said:

You neeed to drive it more genitally.

I thought that particular sobriquet had been taken on by Audi drivers these days?

[Mr Tidy]

Z4MCSL said:

since owning my Z4C I have barely taken it anywhere other than the painfully speed bump populous roads of south London.

As well as being generally incredibly frustrating (and causing me to worry if short journeys are bad for the engine) I am now returning an average 18.7 MPG...


Is this normal
Am I clearly too throttle happy

I think the words "painfully speed bump populous roads of South London" explains the problem!

I'm sure it would do much better if you ever did some runs on motorways or clear roads with the N/S/L!

ETA My 3 litre Z4C is showing an average of 34.0 on the OBC, although I don't commute in it and live in the Shires.

Edited by Mr Tidy on Friday 1st December 01:59

[Vroomer]

My long-term average is 31mpg. This disguises low 20s around town and high 30s on a run.

[928]

Sounds quite good for 6 cylinders; I used to get 18 from an S3 (Mk1), mostly journeys of <4 miles to work. Jumped to what it should have been out of the cesspit.

[pvogue]

Vroomer said:

My long-term average is 31mpg. This disguises low 20s around town and high 30s on a run.

I used to get the same from my 130i same engine I think (30 miles A-roads to work and back)

[Olf]

Get more from that in my Z4MC (21 av) and my driving only ranges between 'spirited' and 'ragging it'.

[AquaMatt]

My average is about 25mpg (see below) which I think is fair given it only runs for about 15-20 miles at a time on a mix of fast country and congested motorway roads. It’s a Coupe too, but I don’t believe that changes anything much.