I have used AMS-oil for about 8 years in my ZX2. When I had to change the cam cover gasket I had a chance to look inside. I say it looks new (except for cam wear). My change interval is about 18,000 miles (once a year). I should do that oil analysis to see how it's doing. I have never thought of that.
2013 Race Red SE 5dr HB 17" 201 Package
USMC 85-92 Gulf 1 VET