I changed my 08 1200c to Amsoil in both holes at 1k miles. I did the clutch adjustment at 2500 miles and changed the trans/primary to the same. At 5k I chaged both and noted alot of shavings on the trans plug. Will I just changed the trans tonight with 7200 miles on it and again it had what I consider a lot of shavings. This change I am trying Spectro primary/trans lube, non synthetic. Will change at 10k when I do engine oil and compare what I find on the plug. This in my opinion is the only real test on the transmission side.
Now conversely I changed the oil, trans and primary on my friends 07 night train to amsoil 20/50 at 1k. Just changed it the second time at 5200 miles. THis time put the Amsoil in the engine only. Put the HD+ in the primary and Spectro 75/140 in the trans. Now I will tell you that when I drained the Amsoil out of all 3 holes all 3 magnetic plugs looked the same, not even enough shavings to clean off although I did wipe them regardless. At 10k I will change them again and compare. Again this is a real test at least for the non filtered stuff.
Now conversely I changed the oil, trans and primary on my friends 07 night train to amsoil 20/50 at 1k. Just changed it the second time at 5200 miles. THis time put the Amsoil in the engine only. Put the HD+ in the primary and Spectro 75/140 in the trans. Now I will tell you that when I drained the Amsoil out of all 3 holes all 3 magnetic plugs looked the same, not even enough shavings to clean off although I did wipe them regardless. At 10k I will change them again and compare. Again this is a real test at least for the non filtered stuff.