Is it accurate to say that the following oils can be grouped together by their similar chemistry? : Amsoil S2k 0w-30 2w-50 Amsoil ASL/ATM 5w-30 10w-30 10w-40 Amsoil S3k 5w-30 15w-40 Marine oil. BTW, Amsoil has new boxes now. I'm sure your aware of this and they might have been out for some time, but I ordered my winter 5w-30 oil for my wife's car. They are much nicer but I did notice that Mobil 1 SS is not on one singal comparison chart. NOAK and temperature flow all compare Amsoil to Havoline, Syntec, Philips and Valvoline.