I didn't know you were in the Air Force Herb! I tried to join the Air Force/Navy to work on jet engines as a matter of fact, I couldn't because of health reason though
I only know Amsoil by reputation. I hear that they are the best and I am sure that if Amsoil says it is good for 10-15K miles, they must mean it.
I back Valvoline because I have been using it for over 4 years when I worked at Toyota. When an 04 Toyota that only comes to us comes in for an oil changes with over 80K miles and I see that the oil is still pretty much unoxidized, I trust it. And this is the conventional oil.