Where mortals FEAR to tread!
I've been having my oil/filter changed at the dealer since I got my RS [

Rhino "low profile" ramps are too tall to get this pavement scraping RS on them without blowing out my splitter---just bought some Eastwood Racing Ramps to get myself back in the game]. The dealer (whose Heritage Edition Ford GT is getting old and he needs a new one) has been charging me just under $18/qt for the
5w-50 full synthetic specified in our manuals (and they've been stickin' it to me on filters too)!
Anyway; the Eastwoods will get me back in business this spring.
Per our manual; I'll use a full synthetic SN, SN+, or SP rated oil. I'm not picky about which brand as long as it meets OEM standards (payed just over $11/qt for the 5w-50 SN rated Mobil 1 I'm using to keep my RS topped off with). Some top of the line filter of whatever brand will do me fine.
Good luck with whatever you go with!