Mobil One from the Triumph dealer was and is high $$$$.I switched to the Amsoil.If you don't want to be a dealer you can become a "preferred customer" and get it at a better price.You just order it and they ship it to you.I am now running it my wifes car also.Here in the SW desert it was around 120F when I switched her car to the Amsoil.I did notice the temp gauge staying a little cooler.I also run my Speedmaster the factory recommended 6000 miles between changes.I know that sounds nuts to some,but I figure for what synthetic cost I am going to get my moneys worth.I use the 20w-50 in the bike.My bike has over 36,000 miles on it now and is due for another oil change soon.I also have the Amsoil fork oil in the front forks.Hey last time I went 20,000 miles about on the fork oil without a change,don't put it off.It is amazing how dirty that oil gets for being sealed up.

Last edited by Speedblue; 11/06/2007 1:29 AM.