Here's the analysis report from my 2012 GT. The dealer gave my a free oil change, so I had them do it at 1000mi, then I put about 3800mi on the oil before dumping it and running the analysis. It is now filled with Amsoil Signature 5w-20.
Thats pretty cool but do u really think u will keep the car when it has 200,000 miles on it?
I'm not sold on special oils there all good today. Oil is so much better then in the 60s and those cars lasted 100k. IMOP if your using convential oil change it every 5k and synthetics every 8-10k. Nothing more nothing less. Keep it simple.