Boils down to personal choice...am NOT an oil test person and change often
IIRC, a test analysis was $28 bucks and prefer to put that cost towards purchasing fresh oil
After the spectrometer arrived, watched the car guys (scientists, engineers, technicians) check it out against their Blackstone reports....spot on and asked how they obtained there sample oil...fun hearing that some of these nerds (I'm one too) made a mess trying to get their plug back in
Took a dip stick out of my Suburban to check and found nothing out of the ordinary