It's a bunch of BS. Any system that provides advice based upon anything but empirical data is a waste.
The only way to tell when you "should" be doing oil changes is by doing a UOA every single change.
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'10 PW 370Z 7AT - wife's car - Project Raspberry Cheesecake
'08 Evo X - built motor+trans | BB-X @ 32 psi | CH3OH | self-built+tuned - ??? WHP
'01 Galant V6 - built motor | GT35R | self-built+tuned - 550+ WHP (retired) |