I've been reading DesertRatR's thread on shorter oil filter intervals and it reminded me that I need to report on my 'experiment'. I have a stash of old Pure Ones for my Cadillac. I decided to run them 2,500 miles (half a normal oil change) and cut them open. After examining the three filters I've used, I can report NO TEARS!!!!! Looks like I can safely use up my stash of YCOD filters! BTW, I WAS getting tears running them 5,000 on this car and some family members' other cars.