Topic drift, but not really.
Concentrate on doing everything else timely.
Realistically, it’s the cosmetic appearance and other mechanical things that will take you out of the car, not a well-maintained engine.
Start with meticulous care of the cosmetic appearance of the vehicle, but also any and all other fluids.
Sounds like your car has a conservative change interval to begin with. I’d get el cheapo Walmart synthetic or Costco synthetic in the correct grade plus a medium grade or better oil filter all changed in accordance with manufacturer’s spec.
If you are worried by all means run it out to the end of the manufacturer’s OCI and order a UOA.
99.5% sure you’ll test fine.