[Big EJ]

180cc of gear lube is a tiny amount. I suspect that it would be prudent to change the FD fluid as often as the engine oil is changed. That is twice as often as the BMW Owners Manual calls for.

The K1600 makes a lot of torque. The front or rear differential in my vehicle, which makes say 3X the torque, holds 3.1 liters in back and 1.4 liters in front. The relatively tiny volume in the BMW FD concerns me.

RL, thanks for sharing the photo's and notes on the FD oil change...very helpful since BMW does not put any maintenance guidance in the manual. I agree that it seems like a very small amount of oil. I also ordered a healthy supply of Amsoil products. I've always wanted to try it but Mobil 1 has always been much easy to get your hands on. Advice, it you order Amsoil, I would suggest paying to become a member as you get up to a 25% discount. Price for a quart goes from ~ $11.15 to $8.36...compared with Mobil 1 (cycle) at ~ $11.99.