Maybe the Amsoil was getting dirty because of the sludge the previous oils left behind?
I tried the Mobil 1 gold cap (dunno if its 10w40, 15w40, 15w50, 20w50, etc)... I think that was in the 96 track bike and it just wasnt happy.. Probably was really my riding, but its easier to blame the oil
Soda... im quite sure the guy on mythbusters rides.. Its not just the jacket that gives it away, but the bike in the background from time to time...
Why the momos in the city do half the things they do i'll never understand...