Oh boy, my favorite subject...Honda V6's. I became an expert when our 2011 VCM Accord was included in the national class action lawsuit. Let me try to distill a TON of research and hard won knowledge for you.
1. Does the 2015 Coupe have the VCM (cylinder deactivation)? In 2011, the manual coupe did not.
2. If yes, all below applies. If not, less to worry about.
3. The high moly in the factory fill is not due to special oil but rather a coating applied to the piston skirts that slowly dissolves into the FF. This is why Honda taught their dealers to insist on not changing oil early. This has been confirmed by UOAs on this forum. The moly coating was added in 2011 to VCMs as part of the solution to the class action failures. So, Honda engineers are telling you that this engine works better/lasts longer with initial exposure to high moly.
4. Check engine oil levels religiously. I'd suggest at least once per week. 2011 VCMs have a five qt sump and were burning oil as fast as one qt/1000 with an OLM that tells you to OC at 8000+. Not a good equation. Make sure this engine has a full sump throughout its life. Keeping oil in it will be the most important thing you do to achieve your goal of 300000 miles. Keep meticulous records on your oil changes just in case.
5. For a refill oil, knowing how desperately Honda engineers want moly in the crankcase, I'd choose one with elevated moly. In 2011, this was SM TGMO. SN TGMO doesn't test as high for moly but some experienced oil people here think it's due to a change of vendors with a different type of moly that does the same at lower levels. I'm not a fan of Mobil AFE oils because of documented reductions in anti-wear additives vs their standard oils. I did extensive research, used and tested the Honda brand "full Syn" 0W-20 and found it to be serviceable but not as good as TGMO. You will have to develop your own comfort level. But, the oil brand is not nearly as important as the level on your dipstick, so watch that like a hawk until you develop a comfort level on whether or not your VCM will burn oil and how fast.
6. The VCM problems were tracked to steady-state highway driving where the engine runs on three cylinders for an extended period, i.e. Cylinder de-activation. If you drive this way frequently or on a road trip, check your oil level daily.
Good luck.
