[zltm089]

looking some of the figures quoted....I'm starting to worry now....either there is something wrong AGAIN with my engine...or it must be me....surely, I can be that much of a psycho driver....am i? am i? ...am i ?...???????????....

or actually, it must be the onboard computer that is givin out the wrong figures...can't be me...can't be me...

[SiKkBaSs]

Kev drive normally for a while and try avoidiing flooring it. See if anything changes. Maybe take it on a motorway run...

[zltm089]

I've tried!...not sure if I have to reset the computer before I start driving economically....I drive like a normal person in town!...

[doughboy]

If you suddenly start driving economically it will take ages / days / hundred of miles for the average mpg to catch up to the new mpg, by then you'll have finished your economy trip!

Try resetting it, then go for a out of town drive to see.

I reset the journey computer on idrive with every fill up, then you know how many miles / mpg / av speed etc for each tank.

I'm gettin 16-20 in town in a manual, but your's is an auto which is even less efficient at town speeds when the torque convertor is not locked up and is busy slurping energy.



Used a whole tank from brim full to low warning in 96 miles at Oulton Park, 9.8mpg - beat that if you can... wonder what CO2/km was for that little trip?

[zltm089]

Cheers Doughboy!!!...I should have reset it before!!!!....will do from now on...

[Hotcoupe]

Originally Posted by zltm089

Cheers Doughboy!!!...I should have reset it before!!!!....will do from now on...

It wont make any difference Kev and you know it

Live with it................you're a nutta!

[dxb335d]

Mate Ive had 16-18 out of my denz. All I used to get for ages untill I started using Motorways and AutoBarn's then it went up to 22 ish.

[zltm089]

Originally Posted by Hotcoupe

It wont make any difference Kev and you know it

Live with it................you're a nutta!

Ian...seriously...I'm a changed man now...LOL...driving in Economy mode from now on...

DSC if always off now, not because of "spirited drive" but because I want to save on my rear brake pads!!! (changed pads and discs in August last year and already got a warning light about my rear pads wearing off last week!!!)

and not flooring the gas pedal anymore!...Only half way thru!....

[SiKkBaSs]

Originally Posted by zltm089

and not flooring the gas pedal anymore!...Only half way thru!....

I used to do this all the time, until someone told me it was actually good for the car to breathe at high revs...ENTER putting your foot down on the regular!

[ElegantSpoon]

Originally Posted by toxicnerve

See this is what suprises me, you're in a 320d and only getting about 6 mpg more than me? Or are you just bouncing it off the red-line everywhere you go?

Its because my town driving is only about a 8min drive one way and then about 15mins the other in traffic so the poor bugger never warms up. I think 36mpg is pretty good for that sort of driving and 47mpg doing 80-90 on a motorway run.

[pjs]

Originally Posted by zltm089

looking some of the figures quoted....I'm starting to worry now....either there is something wrong AGAIN with my engine...or it must be me....surely, I can be that much of a psycho driver....am i? am i? ...am i ?...???????????....

or actually, it must be the onboard computer that is givin out the wrong figures...can't be me...can't be me...

Have you checked its not giving the read out in U.S. gallons?. There is that option deep down in the i-drive menus. Happened to a mate of mine whose car was reading 3-4 mpg down on what he expected.

[dxb335d]

Kev, I rekon its accurate.

[beemerbird]

That's shite Kevin. Get that OBC re-set and get on the motorway, give it a long run, clear out the engine and see what happens.

Bigger engines don't like town driving all the time.

Mine's dropped to what I consider to be a diabolical 17.8 mpg doing short runs as I've been helping someone move house. Normally my commute to work is around 19 mpg. Mine now needs a good run imo and it will get one in the next day or so. Do a long run and it SHOULD stay around the achieved mpg post long run, give or take a few tenths of a mpg. Shouldn't drop drastically either thrashing it as I've found.

[toxicnerve]

Originally Posted by beemerbird

That's shite Kevin. Get that OBC re-set and get on the motorway, give it a long run, clear out the engine and see what happens.

Bigger engines don't like town driving all the time.

Mine's dropped to what I consider to be a diabolical 17.8 mpg doing short runs as I've been helping someone move house. Normally my commute to work is around 19 mpg. Mine now needs a good run imo and it will get one in the next day or so. Do a long run and it SHOULD stay around the achieved mpg post long run, give or take a few tenths of a mpg. Shouldn't drop drastically either thrashing it as I've found.

Thats interesting. How long of a run are we talking? 100 miles? And is a cruising speed (70/75) ok or do you need to be spanking it?

[beemerbird]

Originally Posted by toxicnerve

Thats interesting. How long of a run are we talking? 100 miles? And is a cruising speed (70/75) ok or do you need to be spanking it?

I'd say minimum 80 miles tbh and long enough to get rid of all that nasty carbon build up, moisture in the oil etc. Yours would love it, the big D really is at it's best as most diesels, running hot and hard on a long run. That cruising speed would do it but mine is always +10/15. Spanking it would be three figures plus for a long period.

Always remember when I took the Cayman S to Le Mans. When the time came to return to Blightly the car, by the end of 8 days, had had seriously good long runs to and through France. I 'spanked' it cruising at 150 mph for about 20 miles heading for Calais, no word of a lie the mpg dropped a mere 2 mpg overall, not bad eh.

[ElegantSpoon]

Originally Posted by beemerbird

...... diabolical ......

Hahaha

[zltm089]

ohhh u guys r indeed diabolical!!!.....sorting my out my mpg problems by going on a spirited long drive on the motorway!...lol....

[zltm089]

looks like i will have my long motorway drive soon....goin to middlesbrough next weekend....6 hours drive approx....shud b fun...

[Steve A]

for a bit of perspective my RS4 does

Town 15
combined 19.5
Motorway 24-25

My M6 did

10.7 mpg combined.......................................... ..........FAIL but WIN on power

[dxb335d]

Kev it will take monstrous amounts of motorway miles to raise it.

Did with mine.

[toxicnerve]

Originally Posted by beemerbird

I'd say minimum 80 miles tbh and long enough to get rid of all that nasty carbon build up, moisture in the oil etc. Yours would love it, the big D really is at it's best as most diesels, running hot and hard on a long run. That cruising speed would do it but mine is always +10/15. Spanking it would be three figures plus for a long period.

Always remember when I took the Cayman S to Le Mans. When the time came to return to Blightly the car, by the end of 8 days, had had seriously good long runs to and through France. I 'spanked' it cruising at 150 mph for about 20 miles heading for Calais, no word of a lie the mpg dropped a mere 2 mpg overall, not bad eh.

Haha! Awesome. I'm planning on doing some runs soon so hopefully it will clear out the crap from mine.

[jamesdf]

29mpg before i got the green box now 36mpg combined