I still have to cut it open.. but I put a micro-green filter on my Honda... I had a gift card for amazon.. Now I had 6000 miles on regular Mobil high mileage oil and the oil was so clean it looked new.. I actually have a small leak and my father would take paper towel and wipe it off his drive wave and on prior oil changes he would tell me my oil was dirty or dark.. However with the MICRO-GREEN he has told me for months your oil is so clean it looks new.. So after 6000 miles i changed it and put back A01 and Pennzoil Pure Plus ... I will probably never use a Microgreen filter again and I still have to cut it open.. I tell you the filter looks like its going to be hard to cut open as its very soild..