I just wondering what mileage other diesel owners are getting. After 1000 miles I'm up to 21mpg. I do 50-50 urban and motorway, is this what others are getting or am I being a bit of a boy racer?  2005 Zambezi TDV6 - Gone but not forgotten
2009 Alaska TDV8 - Gone and much missed.



WINNER - 2009 �Idler Of The Year� Award
Runner Up - 2009 �Just Doing What It�s Designed To Do� Award


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I'm on 7500 miles and the last 1000 miles or so I've managed 27 mpg a little over half of that motorway, say 60/40.
First few thousand miles around 20-22 mpg split 50/50 ish so I'd say you about the norm, nothing to be annoyed or very annoyed about.

Quite a good joke there Mr Bean!

I know I am not a TDV6 owner but for what its worth in comparison, in my first 1200 miles I am probably averaging 17mpg, and thats also a good mix of motorway and around town driving.

Not that much in it really is there? Especially when you condider that unleaded is cheaper than diesel at the moment. That was my argument for buying the SC, if there was only 5mpg in it, why bother... L319 D4 HSE

1998 110 TUM HS FFR Hard Top XD WOLF

1982 Series 3 SWB

I'll be honest, i am a little annoyed at the MPG that the RRS TDV6 manages, if compared to a Merc 270 CDI or an X5 3.0d, the TDV6 is really quite thirsty.. i have 6k on my clock now, mostly town driving, not much stop start thankully, and i don't hang about either, and i average around 20mpg.. on the motorway i think i got 28mpg doing 70mph crawls on cruise up to Manchester and back.. i presume the engine will get less thirsty as time goes on..

I agree, an SC or something like a Porsche Cayenne Turbo wouldn't cost much more to run, if you can stretch to the outlay.

But i can't complain really, a client of ours pulled up in his Lambo Murcielago today, with 5k on the clock he says he would be lucky to get 5mpg, but i suppose you don't really buy that kind of car if your conscious about MPG! and i don't think you would care with that kind of exhaust note, head turning to say the least!

Very annoyed,

Your MPG will get better as the engine beds in. Our car has done 7,500 miles now and the average is now 3-4MPG better than it was when it was new. On short journeys (like the school run) it is doing 25MPG. The other day I did an hours drive on a Sunday and kept to the speed limits, it averaged 29MPG.
I also have a new VW Transporter T5 van with the 5cyl 174bhp diesel and this has now done 15,000 miles. The MPG is now on average 6MPG better than it was when new and I regularly get 36-39MPG.

As far as the Sports petrol vs diesel goes, did you see the article in the AutoExpress the other week? They compared the total ownership costs of a petrol and diesel versions of 32 different cars. The looked at buying price, depreciation, fuel costs (at today's prices), tax, insurance etc etc. A diesel LR Discovery 3 worked out £8,800 cheaper than the petrol, over 3 years - based on 12,00 miles per annum. Matt
-------------------------------------------
RRS ownership for 1 yr, then D3 for 2 yrs. Then cut back to old bangers and working my way back up through two Peugeots in 6 months. Now got Saab 9-5 2.3t and enjoying the performance!

I'm on about 24mpg at the moment and I'm 1100 miles in. Mostly A & B road journeys, a little bit of motorway, but I'm not overly concerned at the moment. As time goes by that figure will increase. Diesel or not, we're obviously not in the realms of the supermini

Cheers
Steve 

2009 Outstanding Contribution Award - Joint Runner Up
2009 'Tech-Head Of The Year' Award - Runner Up

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4.4HSE 10,000 miles 20.5mpg avg.

Thinking about a change to deisel but if 20-24mpg is it then I'm not sure.

2200 miles in and getting 26mpg in day to day running, next to no town driving though, all fast A roads as live in the sticks and don't need to commute to work.

4 weeks in, and nearly 2000 miles up.. initially saw 24-25mpg average when running in, but now with a heavier foot and use of Sport 'box/ command shift it's getting better all the time. Did a run out to Norfolk, on a busy A-road averaging 60ish mph, saw 31.5mpg for the trip which was a big surprise.

Overall, with 60:40 motorway miles:country roads and using cruise control wherever sensible, it's averaging 26-28mpg.

"Diesel or not, we're obviously not in the realms of the supermini" - well this is a whole heap better on fuel than the Cooper S I had a few years ago..!!

Nod RRS Supercharged
Java/ Ivory

'94 F355, '90 M3 Evo, '95 Integrale Evo, '97 Cooper S Works, '84 911 Cab, '89 911 Speedster, '85 6R4, '59 Routemaster and something sensible for the Mrs

23.8 never drops never seems to climb any more than that.
We cant complain just think what the engine is doing, pulling two and half tones and driving all four wheels with all the eletrical stuff to power.
Im happy with it. Its out there somewhere. Second V10 Treg on the drive at the moment.

Am I right in saying the MPG is calculated as a time-weighted average? I mean, without periodically re-setting the trip computer by holding in the 'i' button for a couple of seconds, as time goes by you'll NEVER see a change in the average MPG or average speed, as the single period value (not sure but I guess it may be measured every five seconds or so) will never be far enough away from the current calculated average to make a material difference on the overall value..

Example time. Consider an average MPG of 25 calculated over, say 100 periods of, say 5 seconds. Now, let's say we're on a long run and we're now seeing a change of the periodic (spot) MPG to 30. This would shift the average to:
[(100x25)+30]/101 = 25.05mpg average measured in the next period.

OK, suppose that the average has been accruing for 1000 periods instead of 100.. the same observed shift from 25 to 30mpg would then see the following:
[(1000*25)+30]/1001 = 25.005mpg average

See what I mean? If you don't keep re-setting the trip you'd need to do a massively long trip at 30mpg to see an improvement. I've re-set my trip every time I fill up or start a new long journey, then can get a better idea of how the mpg is improving as the engine wears in.

Nod RRS Supercharged
Java/ Ivory

'94 F355, '90 M3 Evo, '95 Integrale Evo, '97 Cooper S Works, '84 911 Cab, '89 911 Speedster, '85 6R4, '59 Routemaster and something sensible for the Mrs

I've been doing the same as with the Supercharged we are talking small figures coupled with my driving locality so far being short town runs . So will def zero the " i " when I next go on a decent trip to evaluate my exact mpg for the time period concerned.

Thanks Noddy. 
" WITH MORE EXTRAS THAN A HOLLYWOOD EPIC "

Makes sense Noddy.... and I can't say I know how the mpg figure is worked out by the car, but I've never reset my trip odo and I *think* the figure has been changing upwards considerably (compared with your minute deviation in your calcs). I'll have to keep an eye out for that now you've mentioned it...

Cheers
Steve 

2009 Outstanding Contribution Award - Joint Runner Up
2009 'Tech-Head Of The Year' Award - Runner Up

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noddy wrote:

Am I right in saying the MPG is calculated as a time-weighted average? I mean, without periodically re-setting the trip computer by holding in the 'i' button for a couple of seconds, as time goes by you'll NEVER see a change in the average MPG or average speed, as the single period value (not sure but I guess it may be measured every five seconds or so) will never be far enough away from the current calculated average to make a material difference on the overall value..

Example time. Consider an average MPG of 25 calculated over, say 100 periods of, say 5 seconds. Now, let's say we're on a long run and we're now seeing a change of the periodic (spot) MPG to 30. This would shift the average to:
[(100x25)+30]/101 = 25.05mpg average measured in the next period.

OK, suppose that the average has been accruing for 1000 periods instead of 100.. the same observed shift from 25 to 30mpg would then see the following:
[(1000*25)+30]/1001 = 25.005mpg average

See what I mean? If you don't keep re-setting the trip you'd need to do a massively long trip at 30mpg to see an improvement. I've re-set my trip every time I fill up or start a new long journey, then can get a better idea of how the mpg is improving as the engine wears in.

Nod

Oooh now my head hurts

As is said allowing for the deviation you are right. I always reset when filling I have wondered if this is how some people manage to post 30 mpg plus photos as seen on some forums.  Its out there somewhere. Second V10 Treg on the drive at the moment.

yeah sorry about that head-scratcher guys.. work for an investment bank and if I have a load of maths scattered over my screen it looks as though I'm not surfing forums...

try re-setting the trip computer then de-celerating from 60mph.. you'd average about 200mpg...!

Nod RRS Supercharged
Java/ Ivory

'94 F355, '90 M3 Evo, '95 Integrale Evo, '97 Cooper S Works, '84 911 Cab, '89 911 Speedster, '85 6R4, '59 Routemaster and something sensible for the Mrs