Randy, you can order cases of motorcycle specific Castrol from Chaparral. I use Amsoil motorcycle oil products myself, and have for years. Ralph L. Angelo Jr. Author of "Help! They're all out to get me! The Motorcyclists Guide to Surviving the Everyday World!" http://helptheyreallouttogetme.com '06 Yamaha FJR1300 '01 Kawasaki W650 '98 Yamaha YZF600R '95 Kawasaki GPZ1100