330d mpg

[everitj]

Hi all,

We have recently purchased an 03 plate 330d auto touring. The misses uses it most of the time for shortish trips round town and 7-10 mile trips. We are only getting around 25mpg on the obc at the moment. I drove it the other day and reset the obc on a 10 mile run on b roads got it up to around 35-36 av. Is this about right for the car. It's just had a new low pressure fuel pump, fuel and air filter fitted and now seem to run and pull well. I think we get around 300-350 miles out of a tank.
Any comments on other peoples experience of this car would be appreciated.

[TheEnd]

Try it on a motorway, and check if there is any tuning box tomfoolery going on, and if not, i'd guess that would point to a dodgy Maf as long as new car fun can be ruled out.

[texasjohn]

I had a 2004 330d manual and used to get around 40mpg on a short commute where the engine only got warm after about 2/3rds of the journey. I could get low to mid 40s on a motorway run.

I do seem to recall that the automatic gearbox is said to knock a good 7 or 8 MPG off those figures so your mid thirties sounds about right (not that I have any experience of the autobox in that car personally).

ETA: take it out again, give it 7 or 8 miles to warm up fully, then reset the OBD.

Edited by texasjohn on Wednesday 30th December 20:25

[Jespin]

Yep, used to average 40 mpg over 30k in my 330d by this was a manual. You won't regularly see more than 35 mpg from an auto, especially if most of the journeys are short and round town.

[4nonymous]

Auto on a long journey of 80 - 85 mph I get around 34 mpg.

[everitj]

Yeah, need to give it a good run out on the motorway really, was just expecting more that 25 round town, thats down in 330i territory surely.

[texasjohn]

Z3 3.0i auto (same engine as 330i) I had was about 21-23 round town, 32-35 motorway.

[tpcurran]

My 330d manual reads out 54.8mpg, havent reset in long time but I reckon its about right, get 650 to 700 miles to tankfull, One time I got 740 miles from the full of the tank, I dont do many short journeys

[christer]

4nonymous said:

Auto on a long journey of 80 - 85 mph I get around 34 mpg.

I get about 31mpg at that speed in my 550

[4nonymous]

christer said:

4nonymous said:

Auto on a long journey of 80 - 85 mph I get around 34 mpg.

I get about 31mpg at that speed in my 550

cool story bro

[richterswil]

My old E46 330d Auto used to average high 30's based on mixed driving - 40+ on a motorway. Don't recall it ever getting as low as mid 20's.

[everitj]

Is there any common faults that can cause poor mpg? Car has 140k on the clack.

[christer]

4nonymous said:

christer said:

4nonymous said:

Auto on a long journey of 80 - 85 mph I get around 34 mpg.

I get about 31mpg at that speed in my 550

cool story bro

Having driven to Scandinavia recently (I am still here) I reset the trip computer on leaving central London (well Canary Wharf)and have done 1250 miles since. On the way over thorugh Germany I far exceeded the speed above for long periods of time but due to weather I had to take it a bit easy in places. The trip computer is showing 26.7mpg so far, against an actual of just over 26mpg by my own calculations. At 80mph I can indeed average just under 31mpg. Thats not such a cool story though I guess. Sis.

Edited by christer on Wednesday 30th December 22:01

[everitj]

in a 330d??

christer said:

4nonymous said:

christer said:

4nonymous said:

Auto on a long journey of 80 - 85 mph I get around 34 mpg.

I get about 31mpg at that speed in my 550

cool story bro

Having driven to Scandinavia recently (I am still here) I reset the trip computer on leaving central London (well Canary Wharf)and have done 1250 miles since. On the way over thorugh Germany I far exceeded the speed above for long periods of time but due to weather I had to take it a bit easy in places. The trip computer is showing 26.7mpg so far, against an actual of just over 26mpg by my own calculations. At 80mph I can indeed average just under 31mpg. Thats not such a cool story though I guess. Sis.

Edited by christer on Wednesday 30th December 22:01

[bolide]

I'd replace the MAF with a genuine Bosch part and have it coded by your local dealer. Doing that took my 525D from 28 mpg to about 38

Nick Froome