Everyone has their plans and ideas. This is what my Dad taught me.
Change it sooner than later. Every 6 months and or 5000 miles Max.
Oil is cheap. $30 for a home done synthetic oil change with filter.
There are many high quality oil brands out there far cheaper than Amsoil/Redline etc that will yield the same protection following the change it sooner and often mentality. I understand some people/Fleets cannot follow this.
I use 5w/30 Castrol Magnatek which is testing very well lately online. Usually runs $25 for 5+1 at Wally world.
Oil List. Not too current but with some recent updates.
http://pqiamerica.com/PCMO_Sample_Summary_12_15_2016.html