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.