AbBlue?

[yorkiebar]

I asked ChatGPT about AdBlue usage for modern Ducatos:

Compared with expected consumption​

• Fiat’s stated average: ~0.8 L per 100 miles
• Real-world user reports: ~0.6–0.8 L per 100 miles
• Lowest reported (light loads, steady runs): ~0.25–0.3 L per 100 miles

---

Verdict​

• Your 0.5 L/100 miles is slightly better than average — not high at all.
• It suggests your Ducato’s SCR (AdBlue) system is working efficiently and you’re probably doing steady cruising rather than lots of stop-start driving or heavy loads.

 

[treblid]

I have never come across an anti syphon device in any vehicle adblue tank/filler neck. The filling nozzle supplied with the containers is tapered to fit inside all adblue tanks including my Artic Truck! Who is going to want to syphon Pigs Piddle out of a tank!?

I didn't say there was!

 

[h8ten]

My 2021 Sprinter-based Auto-Sleepers Bourton has covered just over 7k, and the Ad Blu was down to around halfway. I've a 10-litre container in the corner of my garage ready to pop in when needed.

 

[our poppy 5]

As it’s made of pee, I’m gonna drink lots of beer and fill the tank myself, urea supercharged with alcohol, hubby bubba! Jeas’ I’m a friggin genius….
So the problems of hydration and fuel efficiency solved.
I knew this van life was going to go down well… buurppp….

 

[Beltie]

I have never come across an anti syphon device in any vehicle adblue tank/filler neck. The filling nozzle supplied with the containers is tapered to fit inside all adblue tanks including my Artic Truck! Who is going to want to syphon Pigs Piddle out of a tank!?

There is a flap halfway down the filler, whether it's anti-syphon or to prevent splashback I don't know, but it's there.

It's probably not a problem for a PVC but on a coachbuilt the filler is often recessed into the bodywork, and the tube supplied with the bottle is not long enough to open the flap. My solution is a bent bicycle spoke to hold the flap open!

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[MerlinUK]

There are lots of reports of issues with Adblue Crystalising.

This site talks about ways to prevent it: https://www.forteuk.co.uk/news/fort...emove-adblue-crystals-in-commercial-vehicles/

 

[Ian_H]

There are lots of reports of issues with Adblue Crystalising.

This site talks about ways to prevent it: https://www.forteuk.co.uk/news/fort...emove-adblue-crystals-in-commercial-vehicles/

That site is advertising their own products!

 

[Mark1965]

There are lots of reports of issues with Adblue Crystalising.

This site talks about ways to prevent it: https://www.forteuk.co.uk/news/fort...emove-adblue-crystals-in-commercial-vehicles/

They want you to buy their products. I spoke to our vehicle workshop manager who has 40 years of experience with Comercials. I asked him if he'd ever known any of our AdBlue tanks etc suffer Crystalization. We have been running AdBlue for around 20 years. There has been issues with sensors etc but not crystals forming in a storage tank. I can only say what I know, you will have to make your own informed choices.

 

[VXman]

My VW Crafter, with the same engine as yours was showing 17,000 miles to refill when I collected it from the dealer (who had topped it up apparently), it increased to 17500 miles. Now 2000 miles later it is reading 16500 miles adBlue. I added some anti-crystal treatment as it looks like it will be in the tank for a while.

Similar to you. From new my ad blue range started at 16000 miles over time rose to 19000 miles and after now covering 15000 miles still shows a range of 14000 miles. At least now it is giving me volume required to fill which only started to show at 13500 miles. Like you my van runs at 3800 to 4000kgs in touring trim.
Surprising how vehicles are so different.

So what size Adblue tank do these vehicles have?

 

[DucatoMan2]

It sounds like I should be visiting the truck pumps for ad-blu; I have tended to avoid blocking those for the intended customers.
The forecourts deserve more publicity about their outrageous ad-blu containers prices - blatant profiteering.
It certainly is a stress the older vehicle owners avoid. Getting stuck in limp mode (for any reason) is indeed the stuff of nightmares.I've had it once in ES (no known reason) and was sweating until the restart resolved the problem.

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[379inca]

So what size Adblue tank do these vehicles have?

30 litre, present rate of use should see over 35,000 miles

 

[our poppy 5]

I’m told I have a 14 litre tank on my V-line, we filled it before driving to Alicante and back, we did 2871 miles Round trip and filled it up when we got home, it took 11.5 litres, this shows a fraction under 250 miles per litre. This is higher than the Kon tiki I had which did 215 miles per litre. It cost £1.69 per litre, had I filled it in France it would have been €0.96 per litre or in my case £0.77 pence per litre (I bought my Euros at €1.25 per £1.00) I’m going to re-map it and run it a year to see if it’s any better. If not it’ll get remapped back..

 

[Pausim]

The Fiat Ducato has a 19 litre AdBlue tank which is I believe pretty standard on vans. My Mercedes Sprinter was also 19 litres.

 

[danielf]

Well it's a little symbol but it lights up looks like a puff of smoke coming out of an exhaust

In my campervan ,it is called the wet fart light ….

A gust of wind with droplets in it ….

My 2021 2.3 I always keep it topped up and then use forte anti crystallisation liquid in recommendation of my MOT garage , as they say low use causes lots of adblue issues. My van has moderate use, but now I work away from my home town it is very much the third vehicle .

Daniel

 

[our poppy 5]

30 litre, present rate of use should see over 35,000 miles

That’s 1166 miles per litre.. are you sure?

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[379inca]

Absolutely positive. Seems to be the way VAG and I think Merc system works. Currently touring in the alps and definitely not driving like miss Daisy .

 

[Pausim]

Absolutely positive. Seems to be the way VAG and I think Merc system works. Currently touring in the alps and definitely not driving like miss Daisy .

My Mercedes Sprinter used a lot more than that.

 

[hja]

Well I have no idea how much adblu we have added in the just over 4 years we have had the 2021 Ducato! The light has just gone on at 10000 miles so will get some over the week end and add it. We just have a light, no gauge. I shall buy 2 x 5 litre containers because I find the 10l difficult to hold up high enough. Yes, more expensive, but in the general scheme of things, not a lot more. We have used the tube attached to the container but don’t find them very efficient, may be us. So we bought a flexible funnel which is long enough to force open the flap and the funnel catches any splashes.

 

[rod_vw]

Absolutely positive. Seems to be the way VAG and I think Merc system works. Currently touring in the alps and definitely not driving like miss Daisy .

It's the 'not driving like Miss Daisy' that gives you the lesser AdBlue consumption.

 

[gus-lopez]

I think I read some comments that you still have a big bill.

Whereas in Italy the government laid the emissions problems solely at the feet of the manufacturers for them to repair,replace & pay for anything rewuired

but why do they call it ad blue?

In the states it is 'DEF' diesel exhaust fluid

. My Local Shell Garage wants £18 for 5litres of screenwash! Its less than a fiver in the supermakets..

I got 3 for 2 the other day at 2,23€

Most citroëns seem to use very little of either there own Eolys fluid or even adblue these days

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[379inca]

It’s the 'not driving like Miss Daisy' that gives you the lesser AdBlue consumption

Interesting
I knew my lead foot would come in handy one day

 

[whisky walker]

In my campervan ,it is called the wet fart light ….

A gust of wind with droplets in it ….

My 2021 2.3 I always keep it topped up and then use forte anti crystallisation liquid in recommendation of my MOT garage , as they say low use causes lots of adblue issues. My van has moderate use, but now I work away from my home town it is very much the third vehicle .

Daniel

Brilliant description

 

[Mark1965]

I didn't say there was!

Sorry..for some reason my reply got on to the wrong part of the thread!

 

[Mark1965]

Well I have no idea how much adblu we have added in the just over 4 years we have had the 2021 Ducato! The light has just gone on at 10000 miles so will get some over the week end and add it. We just have a light, no gauge. I shall buy 2 x 5 litre containers because I find the 10l difficult to hold up high enough. Yes, more expensive, but in the general scheme of things, not a lot more. We have used the tube attached to the container but don’t find them very efficient, may be us. So we bought a flexible funnel which is long enough to force open the flap and the funnel catches any splashes.

Aldi/Lidl have the best price on AdBlue they sometimes have both 5 and 10 litres on sale. "In the Middle of Lidl".

 

[379inca]

That’s 1166 miles per litre.. are you sure?

Update.
We have just completed a 3000 mile trip of Europe. The vans recorded mileage is now 16415 owned from new and not topped up the asblue tank.
The display tells me that I could top up with between 9.75 to 12 litres. Assuming we have used 12 litres that means we are using 1litre of adblue per 1368 miles.
Must be a record

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[Howard B]

Topped mine up before we left UK & it worked out we were getting @ 120 miles per litre. So after doing 1000 miles I topped up in Spain expecting to get @ 10 litres in. Only managed 4, so its 250 miles per litre between this & the last fill. Never had had that before.