The trouble with AdBlue

Clean and green assuming you know what it is and how to use it.

We hired an A6 earlier in the year and the company told me it would need an ad blue top up shortly.

Me (petrol guy only): say what now?

Hire company: Would you like us to do it for you sir?

Me: Yes, I flipping well would when I learned I'd have to buy a special container, get the right tool out etc. etc. What a faff.

Cue lots of annoying noises as the hire car rep struggled to get the cap off (it uses part of the tyre arm). They had a lousy filler container so adblue (whatever it is) went all over him and the car. Then he damaged the thread on the cap screwing it back on. On a brand new A6. All why I was still waiting and watching for the 'executive' car thought I had hired. Amazing really.

Up to that point I'd never heard of Adblue. I am in the confirmed 'out' camp as far as diesels are concerned. I realise that might not be easy with all the vans and cars now using it...

So if you've bought a new diesel and have to suffer the inconvenience of topping up the Ad Blue remember to do it correctly.

If you do get it wrong the consequences can be severe requiring a full fuel system drain and inspection of various injectors. So be careful! The filler cap may not be easy to see especially if its dark or remove - you often need a tool. Plue if you have ever put fuel cleaner straight into a fuel tank then I can see why some people may get confused when putting in Ad Blue for a vehicle they're not familiar with opting to pop it straight into the tank!

If ever there's a case for RTFM, then Ad Blue is it.

Join In

Comments (1)

  • If I’m not mistaken, ad blue separates the nitrogen and oxygen from the nitrous oxide (exhaust fumes diesels emit) so it is much better for the environment. Nitrogen and oxygen are naturally occurring in the atmosphere, whilst nitrous oxide is toxic.

      1 month ago