My 200 has a capilliary gauge set up and runs as follows on my old daily commute, I could predict the stat opening to within a hundred yards or so.
2 mile journey through town 30mph and the gauge barely moves until its done 2 miles then it creeps to 40, then Im onto a 50 section of road for a mile or so then the temp rises, once I get onto the 70mph section I give it some beans and after a 1/2 mile or so the temp creeps to 95/6 then the stat opens and the temp drops to high 80s and pretty much stays there for the rest of the 15 mile journey, if its sub zero as I crest the top of the hill which is over a mile long and crawl down the other side as its a 40 limit the temp will drop to low 80s and the next few miles are alll downhill in a 30 limit and the temp can drop to under 80 and the heater is then pants!