FAA "licensing" is not required for military pilots. Many military pilots eventually become commercial FAA licensed pilots. One small paper change. The basic skills are still the exceptionally high quality military ones, whether you have a piece of paper to prove it or flew for it while using your aircraft as a weapon system AND flying. I know I was one.
I know oil and Amsoil pretty well too.
Amsoil does not sit,pay,submit for API licensing most of the time but the lubricants are rarely a problem formulation quality wise.
Now the marketing and corporate side is a whole different argument. If it was not for the high quality BITOG/Amsoil dealers that support and contribute to this site I doubt the product would see the light of day here. FOR MARKETING REASONS. Do I love Amsoil marketing NO, do I respect the oil analysis results from those who use it properly, yes. It performs well with quality oil analysis ( sadly not Amsoils own ) that is used to employ the product safely and effectively.
Terry