Last fall there was a thread about which engine oil was the best. One fellow who was a dealer was taking the position that Amsoil oil was the best, I believe he was from Canada. I wrote and told him to send me some and I would test it in my bike and put whatever I found on this board. It's been a long winter here in Indiana and I just recently had they oppertunity to try his oil. I have always used Mobil red cap with good results. The difference is amazing, this Amsoil oil makes my 2001 GL1800 shift as smooth as silk. I am one not to change anything that I know to work without someone tring it before me. But in this case this oil is by far the best I have ever used. I have tried Golden specter oil (I did not like it at all), Honda (made my bike shift hard) and Mobil red cap (good oil but the bike shift with a loud clunk sometimes). I have to say this Amsoil makes the motor guieter and shift smoother then any other oil I have every used. Since I have lost that fellow name and number that sent me the oil to try, I will have to find out where I can buy some more as it will be the oil I use from now on. Just wanted to share this with all of you. --Larry