3 family members (wife, daughter and MIL) decided to buy Rav4s over the last 8 months. (2013, 2014 and 2015). All were purchased new. I changed out the factory oil in the 2013 at 5k and replaced it with AFE 0w20. I plan to do the same for the 2014 and 2015. When should I have the UOA performed? 7,500? Or should I wait until the 3rd oil change so that more break-in material is removed in the 2nd change. Thanks in advance for your feedback!