I have used Amsoil for several years now and am a "preferred customer". I am about to order more oil for my bike, and I'm going with the 75/110 severe gear tranny oil. The only weird thing I have noticed is that on the Amsoil recommendation chart, they list their first recommendation as their 20/50 motor oil for the tranny. They list their second best recommendation as the 75/110, and their alternate as the 75/140. Last winter I talked to some guy at Amsoil and he recommended the 20/50 for the tranny.
The only thing I can figure out is that this recommendation is more of a marketing ploy. Keeping it simple, and following the MoCo's recommendation of using one oil for all three holes. You can't tell me that motor oil is better than transmission oil for a tranny!
I haven't found anyone on this site who is using their new oil filters. They sound like they should be the best, but there doesn't seem to be any tool for removal or installation. -Too bad. I'm sticking with the K&N because of this.