Mobile 1 #102 Oil filter, wife's 2004 Toyota Avalon at 40K miles, 10K mile OCIs.
Vehicle use: about 70% Highway, 30% City.
OCI History (new filter with each oil change):
5K: Bulk Dealer Dino 5W-30, unknown filter.
10K: Mobile 1 5W-30, M1 filter
20K: PP 5W-30, M1 filter
30K: Same (this is the...