Hi Cutter, I would suggest that you shorten your future oil change intervals down to about 7,500-10,000 miles. I think going over 12,000 miles is just too much for our high performance engines. Cheap insurance...and good "piece of mind"!
I had it changed at around 8k and change because I didn't know how long it had been sitting when I bought it. Reckon I'll get them both done at the same time and save a trip, although last time the loaner was an '06 987 so it wasn't too painful to leave it for a day...