Well a little over 3 years on I figured it was time for me to finish off my own thread! :ROFL:

Here are the intervals between the last 3 refills of AdBlue for anyone who might stumble across this thread;

109570 1500 miles left warning
110870 200 miles left fill 10lts
Total miles since last fill 17570

126044 1500 miles left warning
126644 900 miles left fill 10lts
Total miles since last fill 16474

138425 1500 miles left warning
139193 800 miles left fill 10lts
Total miles since last fill 12381

So there you have it...the benefit of 3 years knowledge of nothing better to do than count the miles between AdBlue refills! :p