BMW 123d economy question, any owners/testers?

So assuming 15k miles a year, the 3 series would have cost you (given average price of diesel is around £1.44/L) £2190. At 37mpg you are only spending another £39/mnth on fuel ... for a punchier, higher specced, faster car I think thats pretty good! There really isn't much in it IMO - I'd just enjoy the car and being able to tell people you have a 'twin turbo' ;) and by the looks of a quick Google they seem to remap to 250bhp which could be fun ;)
 
lordrobs said:
Problem is, can you just enjoy it now? The economy is obviously a concern to you, can you just switch that off and think "meh, I'm happy to spend the extra on fuel for the extra power"?
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probably? I could easily expense it away with an extra trip somewhere.

GinG said:
You are not looking at instant mpg read out are you?
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Nope

unrealrocks said:
So assuming 15k miles a year, the 3 series would have cost you (given average price of diesel is around £1.44/L) £2190. At 37mpg you are only spending another £39/mnth on fuel ... for a punchier, higher specced, faster car I think thats pretty good! There really isn't much in it IMO - I'd just enjoy the car and being able to tell people you have a 'twin turbo' ;) and by the looks of a quick Google they seem to remap to 250bhp which could be fun ;)
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yeah thats sort of where I'm going.. I'm pretty sure I can just forget about this.

Also, there's some sot of diesel treatment that can apparently help, I might look into that.
 
I don't know the ins and outs of it as I don't own a BMW but from what I read on here not so long ago the hidden menu to display coolant temps etc was not that difficult to find.

so My suggestion is to find it and see if your thermostats are all doing their job, if not replace the faulty one and get your mpgz back.
 
BMW probably used your 123d as the pool car for the lunch round. You are absolutely going to have to check this stuff out yourself :p
 
quick update, it seems to be any kind of speed it has an issue with. I brimmed it and reset everything today and drove home via some very slow B roads, 40-50 limit normally with a truck in front of me, and over 30 miles I got 47mpg.

I did something similar on the motorway and anything over 80 and you're sub 40mpg.

To be honest, I think I can live with this as I'm loving the car and the pace it can switch on if required is really impressive and the new toys are keeping me amused :)
 
I never check it live like that its more about sustained performance over a whole tank that was my issue. I'd guess early 40s.
 
I don't think you can expect a huge amount more than that really. It has loads of torque and over 200bhp so if you can get low 40's mpg on the motorway i would say that is pretty good going!
 
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clearly, the issue was as I said that I averaged 44+ over a whole tank and with the same driving style I now average around 37-38, my average speed over a tank is normally 50+
 
I drove the 123d and 135 back to back on the same route and there was only a 10mpg difference between the two with my driving style. not surprising I chose the 135i
I get around 30 - 33mpg on the motorway and have averaged 24mpg over the past 1500 miles which is mostly short journeys to work and back. I have to say that the 123d was the best oil burner I have ever driven, it felt more like a petrol than any other. It just didnt give me the buzz that the 135 did
 
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I'm looking at a 123d at the mo for high mileage commuting, but reading between the lines it's not great.
 
[TW]Fox;24502739 said:
I wouldnt want to do high mileage in a 1 Series. It is not a comfortable place to be for long periods of time.
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I drove a seat Leon FR+ on Friday and thought it was ****e and uncomfortable. I won't deny my current S40 barge is bloody comfortable. Shame about the terrible mpg
 
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