...in my current oil filter. Also assume that as part of my oil and filter changing regimen I take a sample during the change and sent it off to the lab for analysis. What kind of negative impact will the filter media tear have on my test results? Higher wear metals? I can't think of anything else but I'm curious what the media-tear alarmists think. If the answer is higher wear metals, how much higher are we talking? i.e. going from 10ppm to 100 or 10ppm to 15? I am really curious about this because a) I have been using strictly Purolator filters (mostly PureOnes) for the last few years and b) all of my UOAs have come back pretty good in the wear metals department. So I am wondering: if my current filter's media is torn, what will I see later this month when I perform my Taurus's oil/filter change and UOA?