Petrol to AFN ETDi

[jed the spread]

I have been taking mine from the first time the pump clicks on every fill up, I could get loads more fuel in but figured the first click every time would be a fair bet.

jed

[Mudlark]

You need to go brim fill to brim fill if you ask me. It takes a good ten minutes to get the van full to the brim; last ten litres takes ages to trickle in. Once done my fuel guage goes right up to max off the scale.

I did Bristol - Rotterdam - Bristol over the weekend, averaged 105Kph and have 25.32mpg

My friend works for SITA so while there we put the van on the weigh bridge and have 2420kg. Thats pretty much unladen, no kit, no people, water or fuel on board .

[v-lux]

I did Bristol - Rotterdam - Bristol over the weekend, averaged 105Kph and have 25.32mpg

Out of interest, is yours an mtdi mark? They're not dissimilar figures to my van.

[jed the spread]

I have been using the same pump at Tesco with the same flow rate from nearly empty on my last couple of logs on first click. Maybe The Gower fill up has sent it wonky and things might not be as bad but I was driving quite fast and was quite high so wouldnt be surprised. I would get your engine looked at Mark, yolu should be getting miles more than what you do. When was the last time you plugged it in?

jed

[ninja.turtle007]

I have been taking mine from the first time the pump clicks on every fill up, I could get loads more fuel in but figured the first click every time would be a fair bet.

jed

I have been doing the same, but there was a fuel shortage so I thought I would make sure it was full. Obviously not. Does diesel foam a lot or something?

With an educated guess I estimate my average to be around 32MPG.

Mark, mine is going away for a few weeks for a bit of fettling and gearbox oil plates. But when it is back I'll put it on the weigh bridge.

[lloydy]

is there nothing on vagcom that monitors fuel?
Or is there something that can be added to it, as a lot of cars have the ave. mpg function

[ninja.turtle007]

is there nothing on vagcom that monitors fuel?
Or is there something that can be added to it, as a lot of cars have the ave. mpg function

Yes, there is but doesn't that just work off throttle position and not take into account wind resistance etc?

From memory it is litre per hour but it doesn't give an average reading.

Pretty sure Andy has a gizmo that does give an average reading.

[Aidan]

unless you are running calibrated electronic speed sensors and fuel meters then the figures won't stack up, there are too many variables, tyre size, final drive ratio and speedo drive fitted all vary from van to van, Tom's original speedo drive as fitted was a compromise for his final drive ratio and 185R14C or 205/70/14 tyres, it wasn't the most accurate set up even when new, but it was close enough for type approval and his set up was so rare it wasn't worth making a more accurate one, and it may not even have the original speedo drive still in the van, lots of them don't
full to full with gps mileages is as close as you can get to accurate

[jed the spread]

Personally I would be happy with the physics of the same pump on first click from hitting the red on every fill and logging the miles on the GPS like I have done so far....

jed

[jebiga41]

Personally I would be happy with the physics of the same pump on first click from hitting the red on every fill and logging the miles on the GPS like I have done so far....

jed

But you have no way of telling how much fuel you are using Jed so figures will be out unles you run from completely full 70l to completely empty the most you will have is a guesstimate And your figures will be way out

[lloydy]

does it really need to be that accurate, personally if someone tells me they get 35mpg i'm happy to believe that as about right. Could be a couple lower or higher. I think we all know there is to many variables to be totally accurate. The important thing for me, is that no one is moaning about bad mpg in a etdi.

[ninja.turtle007]

I checked my trip reading with my TomTom. Mine under reads by about 7%. I have been allowing for this in my figures.

Paul, my guestimate with the 2.1 was 16-19 MPG and with the TDi 31-34 MPG. There are lots of things that could affect the MPG like atmospheric pressure when filling being one of them. Just trying to get and average. But you are right the most accurate way is to add a certain amount then run dry. But then how accurate is the diesel pump?

I think between Jed's figures and mine we are pretty accurate. I feel this is good enough without getting too anal about it.

[jed the spread]

Personally I would be happy with the physics of the same pump on first click from hitting the red on every fill and logging the miles on the GPS like I have done so far....

jed

But you have no way of telling how much fuel you are using Jed so figures will be out unles you run from completely full 70l to completely empty the most you will have is a guesstimate And your figures will be way out

Not really basic physics apply as its all the same. I will give it a go though on the next fill up for you Paul without the kayak on the roof and driving at a more sensible speed and without the full Westy water tank, etc... I might even resist powering up the long hills at 70mph and drop down to 38mph

jed

[syncropaddy]

But then how accurate is the diesel pump?

Do you not have Weights and Measures over there ..... ??

[ninja.turtle007]

But then how accurate is the diesel pump?

Do you not have Weights and Measures over there ..... ??

As before I don't want to get to anal about this, but do you know to what tolerance the pumps are calibrated too?