Adblue Consumption

Jabberwocky · Apr 4, 2017

Um......?

I have just passed 1500 miles with my new Cali (150 dsg). When I started out at 25 miles my Multi Function display computer said 4,500 mile before fill up. OK, that's what I was expecting. How then can it now be saying 5,000 miles at 1,500 miles later?

T6 CFO · Apr 4, 2017

Are you on the level

Hmmm! Will check mine tomorrow- similar mileage

Mike

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Teejay · Apr 4, 2017

Minw does down only noticed it go up once. from 4000 back to 4500. Expansion due to heat ?

Jabberwocky · Apr 4, 2017

OK, 1347 miles but you can see the readout......

pablo · Apr 4, 2017

I guess it is calculated based on an average. Like the cruise range is based on the average consumption.

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Alibee · Apr 4, 2017

Will be based on a rolling average dependent on driving style and (maybe) how many 'afterburner' sessions you get after short drives.

Loz · Apr 4, 2017

It's not a linear consumption, sensors are used to calculate how much is needed.

DM · Apr 4, 2017

I'm not sure exactly how the consumption / range is calculated. I guess in a very similar rate to fuel consumption based upon current / recent consumption. So if consumption reduces due to driving condiitons then I guess range will increase. I only saw range incease once - at a similar time to you when the van was fairly new. Since then consumption is fairly steady. I have topped up twice - 10litres at 4,000 miles and 8,000 miles.

Jabberwocky · Apr 4, 2017

DM said:
I'm not sure exactly how the consumption / range is calculated. I guess in a very similar rate to fuel consumption based upon current / recent consumption. So if consumption reduces due to driving condiitons then I guess range will increase. I only saw range incease once - at a similar time to you when the van was fairly new. Since then consumption is fairly steady. I have topped up twice - 10litres at 4,000 miles and 8,000 miles.

I was just a bit surprised to see range increase but as you say will settle down with use - and may be I am being a little light on the gas at this early stage in my Cali's life.

hirsty · Apr 4, 2017

The MFD display doesn't seem all that granular (compared to avg. fuel consumption, or fuel range) and seems to often move in units of c.500-miles.

Mine got progressively more insistent & moved to smaller units closer to 4,500 / 5,000 miles, so don't worry about it.

DM · Apr 4, 2017

Jabberwocky said:
I was just a bit surprised to see range increase but as you say will settle down with use - and may be I am being a little light on the gas at this early stage in my Cali's life.

Haha - yes so was I. Got 48mpg on a long run down to Austria (no load / average 55mph mostly on ACC). Never got anything like that since - mostly driving faster with much greater loads.

hirsty · Apr 4, 2017

TOP TIP: Easily double your AdBlue consumption by paying for a big bottle with your diesel inside the garage & then simply get back in your van without picking it up from the forecourt display.

For completeness the pro-move is to then discard the receipt on arrival home :thumb

Stuart · Apr 4, 2017

hirsty said:
TOP TIP: Easily double your AdBlue consumption by paying for a big bottle with your diesel inside the garage & then simply get back in your van without picking it up from the forecourt display.

For completeness the pro-move is to then discard the receipt on arrival home

Another good reason to get it from the pump!

DM · Apr 4, 2017

Stuart said:
Another good reason to get it from the pump!

Not necesarily! I recall an incident with a university minibus where the fuel filler tube had become detached from the outer skin of the bodywork. We only noticed when fuel started leaking out of the wheel arch :Nailbiting