The funny thing is.... I emailed Mobile 1 about their 'friction modifier' wanting to know what it is and how much is in a bottle ... But they can't seem to answer my email.
However, I have switched to using Royal Purple in my transmission with good results, having the 6 speed and when I bought this truck it had a slight grind going into 3rd gear every so often, I have not had that grind since the switch 2 months ago. Shifting is much smoother as well. Time will tell. When I bought this truck at 47k it had factory fill for all gear oils. Now at 52k all has been changed and everything runs smooth.
Good luck in getting your answer, I don't know it since I've never used Mobil oil.