AdBlue?

With the van currently locked away in storage I can't see the actual mileage on the odometer but it's around 11030. 

I've not topped up the AdBlue tank since away back at 8899 when we were stung at a Shell garage near Ipswich.

I saw that Aldi had ten litre bottles in stock the other day at around £12.  I'll get one tomorrow and fill up the van when we get it on Friday for our weekend in Buckinghamshire.

With about 2100 miles since the last fill up i expect it to take all ten litres quite easily.

If pumped AdBlue was comparable in price I'd use that. 

Let's see how this goes.