Add Blue

Andy Martin

Andy Martin

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Joined
May 4, 2021
Posts
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Funster No
80,915
MH
A Class Carthago
New 180 hp 2021 Ducato Based Carthago

We are adding 5 lit of add blue each 400-500 miles after the warning light comes on, this is equates to over 1 litre per 100 miles is this normal ? this is 5 times more than our car uses!

If this is correct it would be better to pump supply it ? its not funny to be holding 5 or 10 litres waiting to drip feed add blue into the tank.

Thanks Andy
 
Can you not fill it right up? Seen it on forecourts but mostly by lorry fuelling

I have no idea how much they hold but our Mercedes car hasn’t had a drop added in 2500 miles, my hope is it will last between servicing 👍
 
Sounds high.
My Citroen Relay base has had one refill of its 15 litre tank at 8k miles. About 10 litres.
[This was after a sensor & wiring issue early on.]
Now done 13k +
Refill done at pump...
 
Did not think it has a big tank so never tried to fill it to the brim, the add blue warning light has come on 2 times now just prior to filling it with diesel, each time we have put in 5 litre of add blue.
 
Google says the tank is 15litres. So might as well fill it.

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Andy Martin said:
New 180 hp 2021 Ducato Based Carthago

We are adding 5 lit of add blue each 400-500 miles after the warning light comes on, this is equates to over 1 litre per 100 miles is this normal ? this is 5 times more than our car uses!

If this is correct it would be better to pump supply it ? its not funny to be holding 5 or 10 litres waiting to drip feed add blue into the tank.

Thanks Andy
Click to expand...
I have got one of these, If you get it lined up correctly with the filler there is no leakage and will transfer quite quickly. When the tank is full it stops flowing and you can remove it without spilling any

Amazon product ASIN B0195973DI
 
Andy Martin said:
New 180 hp 2021 Ducato Based Carthago

We are adding 5 lit of add blue each 400-500 miles after the warning light comes on, this is equates to over 1 litre per 100 miles is this normal ? this is 5 times more than our car uses!

If this is correct it would be better to pump supply it ? its not funny to be holding 5 or 10 litres waiting to drip feed add blue into the tank.

Thanks Andy
Click to expand...
We have same 180 bhp auto 2020 from new light came on at 750 miles but thought it may not have been full when new, filled up took eight litre after further 800 miles light came on took seven litre to fill so very similar consumption to yours going to check if this is normal when it goes in for it's second nox sensor to be fitted when it finally arrives been on order for two months now.
that green chem adblue looks expensive been paying £7.24 for 10 litres at local hardware shop.
My Merc sprinter did 300mls to a litre and had a proper gauge to check the level much more sensible arrangement
 
maxsdad said:
We have same 180 bhp auto 2020 from new light came on at 750 miles but thought it may not have been full when new, filled up took eight litre after further 800 miles light came on took seven litre to fill so very similar consumption to yours going to check if this is normal when it goes in for it's second nox sensor to be fitted when it finally arrives been on order for two months now.
that green chem adblue looks expensive been paying £7.24 for 10 litres at local hardware shop.
My Merc sprinter did 300mls to a litre and had a proper gauge to check the level much more sensible arrangement
Click to expand...
Yes it is expensive but is a one off purchase as you can re use the container and filling device.
I just fill up at the farm when no one watching;)
 
maxsdad said:
We have same 180 bhp auto 2020 from new light came on at 750 miles but thought it may not have been full when new, filled up took eight litre after further 800 miles light came on took seven litre to fill so very similar consumption to yours going to check if this is normal when it goes in for it's second nox sensor to be fitted when it finally arrives been on order for two months now.
that green chem adblue looks expensive been paying £7.24 for 10 litres at local hardware shop.
My Merc sprinter did 300mls to a litre and had a proper gauge to check the level much more sensible arrangement
Click to expand...
my merc 519 based 783 has a gauge too, when we had an issue with the EGR resulting in a replacement it was using a fair old amount of addblu
prior to EGR failure but after replacement its using a lot less

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my Motor home has been to the fiat garage with no faults found so we will have to put up with using 1 lit of addblue to 100 miles which i think is crazy
 
There's is another thread running with exactly the same question on AdBlue consumption, but 1Ltr per 100 miles is taking the Pee, literally.:giggle:
I would get it checked out by Fiat or MH dealer if they do servicing, as that sounds like something is wrong to me.
Our 220BHP 4x4 BMW car hasn't needed to be topped up in 8K miles.
Good luck, let us know when you get it checked over.
LES
 
The motor home dealer took it to the Fiat Garage , here is there reply !

The vehicle came back from Fiat yesterday for the Ad Blu and they have done numerous tests and no faults were found
 
Its a New 2021 with 1200 miles on it so far we have added 10 litres add blue light comes on the same time as we require fuel, this is how we know how much it is using, the tank takes around 15 litre we were advised when empty.

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sorry no add blue is cheaper :cool:
 
TinaL said:
There's is another thread running with exactly the same question on AdBlue consumption, but 1Ltr per 100 miles is taking the Pee, literally.:giggle:
I would get it checked out by Fiat or MH dealer if they do servicing, as that sounds like something is wrong to me.
Our 220BHP 4x4 BMW car hasn't needed to be topped up in 8K miles.
Good luck, let us know when you get it checked over.
LES
Click to expand...
About the same on our BMW.
9ltr AdBlue tank, which gives around 10-11,000 mile range.

1ltr per 100 miles, sound like someone has a leak
 
Andy Martin said:
The motor home dealer took it to the Fiat Garage , here is there reply !

The vehicle came back from Fiat yesterday for the Ad Blu and they have done numerous tests and no faults were found
Click to expand...
Hi Andy, I dont agree with Fiats findings on the Adblue test, as when I googled average consumption of Adblue on a modern cars is 8 to 10K miles per 9 litre tank.
Then I found this info, to see how the Adblue systems works, and there is an Ablue Injection Control unit.
I really do wonder if many people/mechanics know enough about Adblue systems, to know how to make necessary tests or adjustments.
LES

What is SCR technology for trucks, buses, off-road vehicles and cars?​

"SCR" is the name of a post-combustion technology treatment for diesel vehicles, which allows them to reduce their harmful emissions of NOx (nitrogen oxides). SCR stands for Selective Catalytic Reduction. This technology requires the use of a reagent called AdBlue. Almost all of the main engine manufacturers use this technology to meet the requirements of new legislation on NOx (Nitrogen oxides) emissions.

The main components of the SCR system are the:

  • SCR catalyst
  • AdBlue Fluid injection unit
  • AdBlue tank
  • AdBlue injection control unit.

How does AdBlue work with SCR technology?​

AdBlue is injected from the vehicle’s dedicated AdBlue storage tank into the exhaust pipe, which is in front of the SCR catalyst, but downstream of the engine. As it is heated in the exhaust, the AdBlue changes into ammonia (NH₃) and carbon dioxide (CO₂). When the nitrogen oxide (NOx) gases from the exhaust pipe react inside the catalyst with the ammonia, the harmful NOx molecules in the exhaust are converted into harmless nitrogen and water, which is released to the atmosphere as steam.

Do I need to maintain my vehicle’s SCR system?​

The SCR system is installed in your vehicle by the manufacturer and works automatically. You do not need to maintain or modify it. AdBlue is automatically injected into the exhaust depending on your vehicle engine’s load. As for adjusting the consumption, the level of AdBlue consumption is determined by the vehicle manufacturer.
 
Adblue usage is going up per mile to meet the emission standards the new Fiat's have a host of new stuff engine to meet the euro 6D temp standard, be it smart alternators, electronic fuel pumps etc and the adblue usage turned up.

Also cars are a lot lighter than motorhomes so not comparable really.
 
1ltr to 100 miles is ridiculous.
Nearly cheaper to run on adblue and fill the adblue tank with diesel. :unsure: ::bigsmile:

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Andy Martin said:
my Motor home has been to the fiat garage with no faults found so we will have to put up with using 1 lit of addblue to 100 miles which i think is crazy
Click to expand...
Sounds to me that you have a dosage valve fault……..or a leak
 
As stated in another thread our 3.0Itr Iveco uses 1ltr per 100 miles the Iveco dealers say this is acceptable
 
Andy Martin said:
The motor home dealer took it to the Fiat Garage , here is there reply !

The vehicle came back from Fiat yesterday for the Ad Blu and they have done numerous tests and no faults were found
Click to expand...
If it were me, I'd be asking the dealer questions about what tests and what are the results - in detail. I'd then want to know what the manufacturer estimates the usage to be expected and what are comparative figures from other users. Did the dealer advise you what the cost and consumption of AdBlue was likely to be?

If this stuff is supposed to be injected in a controlled, metered fashion and the metering is wrong, what effect does this have on the emissions it is supposed to be controlling? What effect does an overdose have on the SCR catalyst?

If you find that your vehicle is seriously abnormal in this, I'd be thinking about rejection as they have tried and failed to fix it.
 

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