MK7 GTD - Real Life MPG

[dippy_x]

Similar experience a couple of weeks ago. 200+ mile run up to Northumberland without stops, pulled into the drive and the fan kicked in and ran for around 5 minutes.

I really do think that on a run like that, there's no chance the DPF isn't clean as a whistle, but the car needs to cool down the DPF system - it probably retains heat a lot longer than the rest of the engine system without a cooling intervention.

Im not convinced - I think the cars doing regens at weird times.  The last 40 miles of my journey backup are off the motorway on the A702.  There are roadworks on this at present.  When I stopped here the stop/start worked as normal!

[Mark V GTD]

Damian - how do you know its re-generating?

[C2K]

I've only done 200 miles and also have had a DPF regen for sure, it came very early on in the first instance.

Stop start can stop working for other reasons though.

[mcmaddy]

Finally managed to crack a plus 50mpg journey yesterday and in parts I wasn't hanging around either. Lockerbie to Sunderland via m74 > a69> a1 etc average speed 55mph end average mpg 52.4. I got 48mpg going up early yesterday morning at 2°c but temp was a positively balmy 10°c coming home. I also think that without the short bursts of overtaking it would have been nearer 60mpg but once you put your foot down you can't help leaving it down for just a bit longer 

[monkeyhanger]

Finally managed to crack a plus 50mpg journey yesterday and in parts I wasn't hanging around either. Lockerbie to Sunderland via m74 > a69> a1 etc average speed 55mph end average mpg 52.4. I got 48mpg going up early yesterday morning at 2°c but temp was a positively balmy 10°c coming home. I also think that without the short bursts of overtaking it would have been nearer 60mpg but once you put your foot down you can't help leaving it down for just a bit longer 

That's about what I did on a North Shields to Hartlepool round trip on Saturday (indicated) - that temp difference really seems to make a lot of difference to the mpg on the MK7. Who knows what the car might've done without that 110mph spurt. Doing more than 15 miles on a single journey does make all the difference. My car will need filling in the next few days, so i'll know what effect the DTUK box has had on my actual mpg. Right now its at a single graduation below 1/4 full, with 370 miles done and the range reading 90 miles left.

[KyleB]

Getting a good mpg is addictive but watching the speedo climb effortlessly is even more addictive. Love the torque in the GTD. God knows how good it is with a box on like you've got Matt. Think the warmer weather is helping the mpg, although it seems a bit random too.

Mine has been down the last couple of days to 49mpg then today on same commute it's up to 51. To be fair I'm happy with my mpg in comparison to the performance of the car. Massively under what is advertised but I love my car too much to be too annoyed.

[mcmaddy]

I agree kyle not many cars can sit at 90 and still return 50 plus mpg's. It's just trying to stop the little devil on your shoulder egging you on instead of easy driving haha

[monkeyhanger]

The last few days have been really good with the warmer weather. Today I managed 51mpg (indicated) on my commute driving sensibly (no opportunity to do more than 70mph).

Last night though, on my way back from Newcastle me and an old shape Focus ST (221Hp/320Nm) were having a bit of fun for a couple of miles (the road was empty) on the coast road – definitely noticeably (but not hugely) quicker than one of those without even getting into the clicky zone of the pedal. Despite the spirited driving, I still returned an indicated 49mpg.
I will be filling up tomorrow. The range is saying 60 miles left, the gauge is just into the last white increment on the gauge, and I’ve done 398 miles on the tank. Indicated mpg for the tank is 47.8. I’d take a guess that the DTUK box has made my indicated mpg somewhere around 5-7% optimistic, from around 3% optimistic. I’ll know for sure tomorrow. This by far the most fun tank of fuel I’ve had with this car so far. Been watching the fuel gauge closely and I’m surprised how linera it seems to be in the white zone. Excusing the fact that the needle doesn’t move from full for the first 50ish miles, it seems to move a consistent single increment every 10 miles, or a consistent 1/8 of a tank every 50 miles.

Kyle, the car is phenomenal with the box on – it’s like the throttle is on a hair trigger, and the car responds accordingly, in every gear. I find the Devil on my shoulder a lot right now!

[Dan Burnley]

So I have had my GTD since Tuesday, I now have 200miles on the clock and I am getting at least 50mpg permanently. Seems a lot more than what other people was getting from new?
I haven't noticed it regen yet, but not 100% sure how I will tell, just been judging it whether the star/stop works or not. Any more obvious indications?

As you said Kyle the torque is superb, all the time you can just feel the power underneath your foot, but it is so hard no to just put my foot hard down and see what it can really do as I am only still in my running in period... 

[monkeyhanger]

Dan:

Your 50mpg might be one of a few things – the weather has warmed up a bit and everyone is seeing better mpg as a result. For the last week or so, when the temps have gotten up to 9 or 10C, I have seen my car get 5% higher mpg than when the day has started at 1 or 2C.

Your commute plays a big factor – the shorter the average journey, the lower your mpg is likely to be. Around 0-2C, my car is taking about 4 miles for the water temp to get to 90C, and about 8 miles for the oil temp to get to 90C. Doing less than 8 miles a day, your car won’t be fully warm by the time you reach your destination, the car is running much less efficient when cold and soot generation is higher, which will fill your DPF and force regens. I have a 12 mile commute, and I have noticed a huge improvement in mpg and regen frequency when I up my miles a bit. If you do 15+ miles for most of your journeys then you should be seeing 50mpg indicated, even in the winter, and most of your regenning will be getting done passively.

Your first regen will stink, it’ll smell like your car is on fire! Most people get their very first one at about 200-250 miles, and then it seems to be anywhere between 200 and 500 miles thereafter, depending on how short your journeys are (and therefore how quickly you’ll fill your DPF) – your car will idle at 1000rpm and not the usual 800. There are other things that will prevent stop-start working, related to battery load. If you’re at a standstill and you’re using your heater or aircon more than a smidge (or heated sets etc) whilst the dipped beam is on, you will usually find your stop-start not kicking in unless the battery is at a very high state of charge (90%).