EddScott

New diesels have a DPF which clog up on short journeys. They can be a pain to clear - 4K RPM for 30 mins to clear or clog up altogether, won't recharge and slap a £1000 bill on your lap.

Also on cold cycle diesels will chew the fuel until they are warm.

I've removed the DPF, EGR and EGR cooler from my A4 TDI170.

I'm part of the local model railway club (sounds the height of geek? you'd be right!) and one of the old boys has an ecoboost focus and he said it was great on fuel. It looked like a 3 pot engine with 2 turbos. Did more than my Audi which for a diesel is a bit pants at 43mpg average.

scoobynutta555

2.0 tdi vag here, 9 year old sport Touran, averaging mid 50 mpg. Short plus long journeys, never had a problem. Can see well over 60 mpg on a run.

SRSport

I think thats the only way to go with diesels. Do they use significantly more fuel when cold than petrol equivalents?

mark1esc

will it still pass mot ok ?

RICHARD J

iTrader: (4)

Needs a remap to run right & put warning lights out, but not only will it pass MOT but it will go better & be more fuel efficient.

mamoon2

My Mercedes C220 Blue Efficiency is supposed to do 50+MPG. It's averaged 34MPG over 15k miles.

Poor (it is an auto, but still no where near quoted figures)

mark1esc

the figures are bullsh*t just another goverment load of crap i went on to what car and there figures are spot on

scoobynutta555

I agree, the figures are wrong. I get considerably more than official figures in all the cars I've owned. If you've got poor mpg then more than likely there's an issue with the car or driving style.

SRSport

Often the figures are under optimal conditions so in reality should be impossible to achieve. I find that due to my driving style smaller engined cars offer no economy benefit over slightly larger engines.

For example my B160 with 1.5l 95bhp I had for a courtesy car for a week averaged around 25mpg. My B200 Turbo 2.0l Turbo petrol averages 24 doing exactly the same trips. This is because the revs have to go very high on the underpowered car just to get it to go.

scoobynutta555

Not impossible at all.

mark1esc

whats your suggestion

ALi-B

iTrader: (1)

I wish we had the old MPG calculation system...used be just at a constant set speed. None of this urban from cold and extra urban cycle crap.

I have the old mpg figures for my Jag...22mpg at constant 75mph....guess what it does at constant 75mph? Yup, about 22mpg!

The biggest let down for us is the Seat Altea TDi 140 which has never ever come close to its claimed 47mpg average let along its claimed 55mpg extra urban: On a 1000mile run it avarages at best 41mpg...Our Bmw 530d GT does 41mpg on the exact same journey. Not a bad difference considering its a car that weighs 500kg extra and has 100bhp and 170lb/ft more than the Altea and has more emissions control! BM's claimed average is 43mpg...believable and probably achieveable with less right foot.

scoobynutta555

Match your driving to maximise your mpg if that's your bag. Not difficult really.

mark1esc

its got a driver performace computer built in all the lights are on to say it being driven right what else can we do. NOTHING. They are selling these car under false figures end of story

scoobynutta555

Get the number 11.

^Qwerty^

I could get low 30's out my A8 with the petrol FSI engine on a run

mark1esc

no 11 what bus be better off mate

zip106

Get a bigger engine

bighead

iTrader: (1)

lol my M3 V8 only do 16.6 mpg

rabbos

Yes! a proper car

I'm fed up reading about economy from every site that used to be devoted to interesting cars.

Can all further diesel, economy, mpg, etc. talk be transferred onto bbs.oldmantightfisteddullfeckers.com ?

SRSport

Im sure most are fed up with having to write about it. Its a way to vent frustration as many people are now unable to afford to run the cars that are their passion, me included. Its gutting.

mervil

iTrader: (5)

My E39 M5 managed 26mpg in a run with cruise control on but went down to 11mpg when I stepped on the loud pedal

P1Fanatic

Lol I don’t feel so bad at getting only 25mpg in my RS Mk2. Luckily I don’t have a long commute (which also doesn’t help the MPG) but then again I bought the car without mpg in mind. I am quite happy that it is 25mpg as my FN2 CTR was only 28mpg over 25k miles but had no torque so you had to thrash it to get anywhere.