Not tried. But I think cannot hard the gearbox. BMW ATF is already good quality, the shell stuff is better, I expect, potentially cheaper as well ?.
A German tech (garage owner for 20 years in Germany specialising in BMWs), said in Asia, ATF mineral oil is already too good for the gearbox. For syntetics, you are wasting money!.
We have no winter conditions here and ATF is designed for low temp viscosity in very cold winters.