Lol I have a unofficial test I ran. Two 2013 mustang 5.0. GottahaveitGreen. I ran manufacture suggested oil intervals with Motor craft 5w-50 in one and Amsoil 0w-30 still on the first oil change. This is the 3rd oil change on motocraft, both cars have mileage withinh 150 miles of each other.
I raced on Amsoil, 0w-30 and the 5w-50 is a DD. I'll post a vid, but one is ticking, and the one that gets raced sounds like it should.
2013 mustang gt GHIG
Two different tire brands, Wagner pads on brembo calipers, dewalt saws-all axle back delete, Billet aluminum shift knob..... that I ripped off from dealership.... That doesn't match my shift boot.