Just like with everything else....
There are way too many variables. Way, WAY too many.
What may be right for you may not be right for the person down the street, let alone someone in a different climate zone.
I want to start up a quick lube place that offers oil analysis as a part of the service.
After the first couple of analysis/changes, we would have an oil change regimen for you.
We would setup a maintenance schedule tailored to your specific needs. It wouldn't be any different from a normal quick lube place in that regard, just the intervals would probably be longer on average.
And it would actually care about it's customers engines.