Just wanted some opinions on this. The car is a 2005 Corolla. The manufacturer OCI is 5K with Dino. This is my girlfriend's mom's car and I only want to change the oil once/twice a year. I think this oil along w/ a Napa Gold or Mobil Filter will be fine without a UOA, but I wanted to hear some opinions. The car has been running various syns for a while, one run w/ ARX maint. dose so it's plenty clean underneath the oil cap. BTW, car has 89K now and will be at 91K at next oil change. Thanks in advance and please let me know if I left out anything.