UOA for 2000 Mazda Miata LS. Bought it in 2014 from a second owner that had it since 2002. I drive it moderately hard, WOT at least once a week. Last 4 oil changes were all done using Castrol Edge 5w-30. Last oil filter was Mobil M-108, previous were OEM Mazda. I am a bit concerned about the high copper since I don't have an aftermarket oil cooler. I am likely to try Mobil 0w-40 for my next oil change.