This is the factory fill (presumably BMW MTF 94, the recommended fluid). The 6-speed Getrag manual transmission is equipped with the optional LSD. The manufacturer claims that the transmission oil is a "lifetime" fluid, which I suppose is true if you decide the vehicle's lifetime is over when the transmission dies. I changed the fluid with Redline MTL. Shifting feel is unchanged or very slightly notchier (at least in the warm weather we've had since changing it). I'm inclined to go back to the BMW fluid next time. This just isn't a transmission that feels great to shift (compared to, say, a Miata).