Likely, the *performance* parameters of the test remain unchanged, but other aspects of the composition, like sulphated ash and organo-metallics are limited. Perhaps this is somewhat in-step with API SM. I'm pretty comfortable with my A5/SL Saab Synth 0w-30. Looking for current otc A5 oil, I'd suspect Mobil 1 0w-30, even SM-spec, is about the best example you can find..even if it does not carry the spec....lol.