Imo there's much more to the situation the "mobile 1 is bad". Stock Turbos, Hta greens, etc use a different material bearing as opposed to the Fp red and fp black turbos. I mercilessly beat on my fp red for over 12k miles with Mobile 1 oil and had zero shaft play when I sold it. Then when I purchased the Fp black I had two thrust bearong failures in less then 2k miles on less boost then my red.

Imo the oil pressure requirements of the fp black are too demanding for teliability, 70psi minimum above 4k rpms......