I have had a simple philosophy that has served me for over 30 years:
change your oil at the recommended intervals with the recommended fluid and it (car, boat, tractor, lawnmower) will last until:
a) you wreck it
b) it rusts away
c) you get tired of it
Any other outcomes, while possible, are so improbable as to be noise in the data.
My multiyear hiatus from this site was based on a set of conversations with the 'UOA weenies' as I call them. research them. See that they are actually unwilling, and quite frankly, unable to derive any meaningful information from a report that you cannot also glean from looking at various dipsticks and fluid levels.*1
I rigged a proposal 100% in their favor and no one wanted to be exposed. For good reason. The loss of that $99 (or apparently $130 now) yearly per person. OR put simply: does anyone REALLY need an expert to tell them that exposed window panes are a major source of heat loss in a home?
Notes:
1 - IF you are unable to derive your motors' condition from essentially a visual inspection, thats ok, not everyone is an ace mechanic. However, if your paid ace mechanic cannot, get a new ace mechanic. It really IS that simple.