F31 330d xdrive economy - not great
Discussion
gizlaroc said:
The old tests that showed 30mph mpg, 56mph mpg and 75mpg mpg were actually far more useful than the modern test imho. They should have to add that too imho.
I agree. In fact I find for my usage (rural, very hilly, mostly 5-30 mile trips, driven briskly, with occasional long motorway trips) the fuel economy at a steady 90mph seems to be a very good indication of my overall fuel economy. This has worked well for several cars. matt21 said:
More improvement. 300 mile drive to Swindon today, mixed roads, average speed. 46.4mpg. Becoming happy now. I do like Eco pro mode.....!
Makes me very happy that my 2006, 100k mi E91 330i Touring yesterday managed 430mi round trip from Manchester to Thurrock on one tank, with 40+mi range remaining.I'll work out the mpg after I next fill up, but expect it to be mid-high 30s.
The fact it was 13ºc most of today will make a huge difference too.
I still don't think the figures are that great though, I took this photo today to show someone who has an E350cdi who gets 38mpg on a run and doesn't believe me when I say get 35+ on a run in my 3.5 litre petrol E350......
That was getting stuck in slow moving and static traffic on the M42 and A14, so lots of not moving and then lots 90kmph sections. It normally takes 2h30 ish and 150 miles but the Nav took me off the A14 for quite a few miles.
I still don't think the figures are that great though, I took this photo today to show someone who has an E350cdi who gets 38mpg on a run and doesn't believe me when I say get 35+ on a run in my 3.5 litre petrol E350......
That was getting stuck in slow moving and static traffic on the M42 and A14, so lots of not moving and then lots 90kmph sections. It normally takes 2h30 ish and 150 miles but the Nav took me off the A14 for quite a few miles.
keepoffthemarbles said:
47.2mpg on exactly the same route, same conditions and driven in the same manner as yesterday but 3mpg better today.
I can't explain the uplift, but for a big heavy car with 4 wheel drive, good performance when you want it and on a non-motorway commuter route I don't think I can continue to be disappointed. I'll have to find something else to grumble about - squishy springs or RFTs are top of the list...!
Ambient temp I can't explain the uplift, but for a big heavy car with 4 wheel drive, good performance when you want it and on a non-motorway commuter route I don't think I can continue to be disappointed. I'll have to find something else to grumble about - squishy springs or RFTs are top of the list...!
Average speed
Levels of traffic volume
Headwind
Tyre pressure
All make differences
So further to my previous posts in this thread I now have a "mid-session" update regarding the rectification of the several issues with the car (one of which is it's fuel consumption) ...
I bought this car in Nov 15 at exactly 2 years old and with less than 7k miles on it. I purchased it from the original supplying dealer and noted that the one previous owner's address was only a couple of miles from the supplying dealer.
I've used the car hard over the last 9k miles since buying it last September (this is the second time I've owned it... long story) and as detailed in my previous post I've had to run BMW fuel additive through it as prescribed by BMW after I'd highlighted issues with fuel consumption and a diesel rattle/knock. The car now has 33k miles on it.
The car went in yesterday morning, and having heard nothing by lunchtime today, I thought I'd pop in for a progress report. Contrary to what the master technician at the the other dealership had said, the car does have issues. The plastic inlet manifold was removed yesterday and is coked up to such a degree that the swirl flaps had jammed open. Further investigation found the inlet ports and valve stems are similarly coked up, as is a pressure sensor in the inlet manifold.
The manifold is sufficiently coked up it will need replacing, along with a new pressure sensor. The inlet ports and valve stems/heads will need to be blasted clean with walnut shell, and whilst they've apparently seen worse cases, they still reckon it'll take 2-3 hours to clean the ports and valves properly.
Once the cleaning has been undertaken and the new inlet manifold and pressure sensor fitted, a combustion efficiency diagnostic test will be run to establish the condition of the injectors, though the technician was pretty sure that they'd find further issues with one or more of the injectors.
Fortunately all the diagnostic and remedial work is being undertaken under the AUC warranty (apparently the inlet manifold is £380 as it contains the swirl flaps)
More to follow ....
I bought this car in Nov 15 at exactly 2 years old and with less than 7k miles on it. I purchased it from the original supplying dealer and noted that the one previous owner's address was only a couple of miles from the supplying dealer.
I've used the car hard over the last 9k miles since buying it last September (this is the second time I've owned it... long story) and as detailed in my previous post I've had to run BMW fuel additive through it as prescribed by BMW after I'd highlighted issues with fuel consumption and a diesel rattle/knock. The car now has 33k miles on it.
The car went in yesterday morning, and having heard nothing by lunchtime today, I thought I'd pop in for a progress report. Contrary to what the master technician at the the other dealership had said, the car does have issues. The plastic inlet manifold was removed yesterday and is coked up to such a degree that the swirl flaps had jammed open. Further investigation found the inlet ports and valve stems are similarly coked up, as is a pressure sensor in the inlet manifold.
The manifold is sufficiently coked up it will need replacing, along with a new pressure sensor. The inlet ports and valve stems/heads will need to be blasted clean with walnut shell, and whilst they've apparently seen worse cases, they still reckon it'll take 2-3 hours to clean the ports and valves properly.
Once the cleaning has been undertaken and the new inlet manifold and pressure sensor fitted, a combustion efficiency diagnostic test will be run to establish the condition of the injectors, though the technician was pretty sure that they'd find further issues with one or more of the injectors.
Fortunately all the diagnostic and remedial work is being undertaken under the AUC warranty (apparently the inlet manifold is £380 as it contains the swirl flaps)
More to follow ....
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