Jabberwocky
Forever young (ish!)
Super Poster
Lifetime VIP Member
As far as I understand it, the Cali's adblue range is about 6,500 miles, and a message indicated every 60 miles when about 1,500 miles remains in the tank, this increases to a message, warning light and bleep every 30 miles at 1000 miles or less. Once the tank is empty, the engine stops. 1L of adblue is good for about 500 miles. If you wait for the first message, you should have about 3L of adblue in the tank, and can then fill up with 10L, the most economical size to buy (Unipart adblue + £9.99). The 13L tank and message at 1,500 miles is there for a very good reason, it is not a warning, just a message, 500 miles from a warning, so no shame in waiting for the message to appear.
This seems to be about the easiest, cheapest and most convenient way to top up:
https://goo.gl/maps/soazKiTfpEL2
What I do not know is if it is for HGVs only, or if any vehicle can top up here.
Thanks for info - very useful to know. How much Adblue do you need to put in once you run out to allow the engine to start again? I saw in the thread that you may need to go to a dealer to have some computer element reset - that can't be true, can it?