Originally Posted by OffroadToy
Just change the oil and filter out at Toyota's recommended intervals... especially since your under warrenty.
UOA is generally used to verify oil life for people who have bought into the false economy of extended drain intervals using synthetic.
UOA is a useful tool to evaluate oil if you are comparing brands and grades, but beyond that, it is OCD overkill for most consumer vehicles.
Where it has value is in OTR trucks, which carry several gallons of oil, and change intervals are measures in tens of thousands of miles. For them, that $30 (with TBN) is worthwhile if they can put off a $300 oil change for another 20k. It is also useful for boat owners, where engine hours are the "mileage" equivalent, but idle time and high load conditions vary drastically, as well as heat and humidity levels that can impact condensation (and they too take 2+ gallons per engine).
Like OffroadToy said.... Change it every 5,000 and you're golden. My recommendation is to stick with the factory filter (cheap and good), and use a quality synthetic like Mobil-1, Amsoil, or Redline.
You have a '13 2.7, so you're stuck with synthetic anyways.