07 Nightrain. at 1k mile changed all 3 holes to Amsoil 20/50. But after reading alot of posts and talking to 2 independent shops I decided to change transmission to Spectro 75/140 and the primary back to HD +. Kept the Amsoil in engine as it appears that it is still considered the best overall. Did the change with 5200 miles on the bike. Drained the 20/50 from primary and noted only a little bit of hair around the base of the magnet, not enough to even clean off but I did anyhow. Engine oil drained and found the same amount on the magnet. Drained the 20/50 from the transmission and found the same amount as on the others. Based on the 5200 mile oil drain it would appear the the Amsoil 20/50 was doing a fine job. As mentioned I changed the primary to HD + and trans to Spectro. Will change all 3 again at 10k and see what the plugs look like. By the way, when draining the oil from the big twin i take it you dont get all of it out via the main drain plug as it did not take a full 3.5 qts. Also after running the oil no longer was perfectly clean. Guessing there was .25 quarts left in the block. Do you guys pull the forward drain plug as well or just be satisfied with what comes out of the main plug?