Hey guys, I have a mix of M1 5W-30 and 15W-50 at a 3:1 ratio in my wife's 03 Corolla. We have put about 8300 miles on that oil and was wondering how much longer I should go? Here is the last UOA I did on this car, which happens to be the previous OCI. I used Schaeffer's #132 at 50ml/qt in that OCI. Wear looked excellent, but TBN and Flashpoint wasn't so great, for the 6k mile interval. Should I take it to 10k or test now? Thanks!