I have over 35 years experience with AMSOIL. I began using AMSOIL in 1980 as a customer. My father had recently retired as an Air Force Jet Mechanic Instructor and then became an AMSOIL dealer. Over the next 29 years, dad blessed me with more (AMSOIL) training than I really wanted, at that time. In 2009, Dad died and I, now completely sold on AMSOIL, decided to use the training he gave me by becoming a dealer myself. Speaking from experience, AMSOIL has great products and is a great company to be affiliated with.