This is wife's truck, has 67,251 miles on it. 90% of milege is short trips. Air filter is an EAA, oil filter was a Baldwin. I have been using FP60. Recently switched to 50/50 FP60 and RLI Bio-Plus. UOA was done by OAI. I did change oil and filter. Oil filter is now an EAO and oil is ASL...