1 Series

Author
Discussion

Mattt

16,661 posts

220 months

Monday 11th August 2008
quotequote all
kejaho said:
I've had a 54 plate 120D SE for about 10 weeks and my average has been 35mpg. 70% town, 30% motorway and I haven't been hammering it.
That's pretty poor! I get near that from a 3.0 petrol!

kejaho

6 posts

191 months

Monday 11th August 2008
quotequote all
Mattt said:
kejaho said:
I've had a 54 plate 120D SE for about 10 weeks and my average has been 35mpg. 70% town, 30% motorway and I haven't been hammering it.
That's pretty poor! I get near that from a 3.0 petrol!
I know, I was expecting in the low 40's, and I am starting to wonder if there is something wrong, especially when I see the figures for other cars.

niva441

2,009 posts

233 months

Monday 11th August 2008
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PJR said:
NickB12 said:
I get 42mpg out of my facelift 120D M Sport auto. Mixed driving, not much M way, got 47 over a tank once.

ver.
That ties in very well with what I have got from an early 120D SE Auto. Although if only driven around town, MPG's are mid 30's.

P,
The 120d Auto I had briefly, before getting a properly engineered car, very rarely bettered 40 mpg, even when making a special effort to achieve decent economy. This was on journeys using mostly dual carrageways and motorways. I think 42 was about the best it ever achieved, on a long journey, avoiding braking except when absolutely necessary.

texasjohn

3,687 posts

233 months

Monday 11th August 2008
quotequote all
2008 118d (manual transmission) here. Tuning box.

Best MPG about 65 on the motorways, kept at 70mph or so. If you can be arsed to drive slower (55-60), the MPG will increase and an average 70-72 is possible!

ETA: It works the other way of course (more speed = less MPG) but that said it is the only car I have ever owned that will cruise at a ton and return 40-43MPG while doing so!!

Average day to day MPG is about 48-51MPG although this does not include driving on motorways or dual carriageways (my commute is 7 miles urban and any business travel during the week is generally within the 30 and 40 limits in the city).

It is some way short of BMWs 62.8MPG 'combined' claim, but very very good nonetheless.

£35 a year road tax (or 13% BIK company car tax) is a bonus however.



Edited by texasjohn on Monday 11th August 22:01

kejaho

6 posts

191 months

Tuesday 12th August 2008
quotequote all
I see mentions on the forum of tuning boxes, are they worthwile for the 1 series, what are the best ones? I assume they would invalidate my warranty (it is a BMW approved car)

rich_vw

814 posts

194 months

Tuesday 12th August 2008
quotequote all
kejaho said:
I see mentions on the forum of tuning boxes, are they worthwile for the 1 series, what are the best ones? I assume they would invalidate my warranty (it is a BMW approved car)
Was just going to ask the same, having mention earlier I achive early 50's every day of the week in my 118d (2008), with a tuning box would I be able to get up to the late 50's early 60's, taking in to account the car has only done some 2000 miles now so hardly broken in. Plus what would the box do to my warranty?

niva441

2,009 posts

233 months

Tuesday 12th August 2008
quotequote all
texasjohn said:
2008 118d (manual transmission) here. Tuning box.

Best MPG about 65 on the motorways, kept at 70mph or so. If you can be arsed to drive slower (55-60), the MPG will increase and an average 70-72 is possible!

ETA: It works the other way of course (more speed = less MPG) but that said it is the only car I have ever owned that will cruise at a ton and return 40-43MPG while doing so!!

Average day to day MPG is about 48-51MPG although this does not include driving on motorways or dual carriageways (my commute is 7 miles urban and any business travel during the week is generally within the 30 and 40 limits in the city).

It is some way short of BMWs 62.8MPG 'combined' claim, but very very good nonetheless.

£35 a year road tax (or 13% BIK company car tax) is a bonus however.



Edited by texasjohn on Monday 11th August 22:01
I think BMW pulled their finger out significantly with the later Efficient Dynamics cars. Not only did they improve the official figures, the vehicles were also more capable of achieving them in real life.

They needed to, the originals were so far off what they should have been. Ironically one of the reasons I originally chose the 120 over my current car was its alleged efficiency.

Edited by niva441 on Tuesday 12th August 13:04

dibbly_dobbler

11,283 posts

199 months

Tuesday 12th August 2008
quotequote all
rich_vw said:
kejaho said:
I see mentions on the forum of tuning boxes, are they worthwile for the 1 series, what are the best ones? I assume they would invalidate my warranty (it is a BMW approved car)
Was just going to ask the same, having mention earlier I achive early 50's every day of the week in my 118d (2008), with a tuning box would I be able to get up to the late 50's early 60's, taking in to account the car has only done some 2000 miles now so hardly broken in. Plus what would the box do to my warranty?
Gents can I suggest you have a look over on babybmw.net ? There's loads of info over there. Reportedly there's a big difference to power and economy (for the diesels anyway). I believe it would invalidate warranty, but only if you left it attached when going in for a service - if removed then no problem (although again there is some debate about this !)

carlovers

424 posts

195 months

Tuesday 12th August 2008
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yes a lot of debate i have tuning box on my 120d auto Eff Dyn its now officially a go kart!!fantastic,however the bmw spec. who put it on reckon when its taken off for the service the codes will have to be put back to normal which is a pain in the backside.I thought that i could just take it off and it would not show ,not true.engine drivetrain and gearbox would be invalidated if found out