The tests from 2011 are out of date. Fram has what is now considered perhaps the best filter "ever". The Fram Ultra is a synthetic media filter which traps smaller particles. Also some of the companies that do not make their own filters, K&N for one has changed who makes their filters. So just because it was a good filter four or five years ago does not mean it is the same today. Purolater had an issue with tears in their paper media. As a result they recently redesigned their entire filter line and they also developed a synthetic media filter. Fact of the matter is most filters are adequate. One question that has never been answered is if one filter can trap smaller particles does that mean it a better filter? Trapping particles smaller than what can do damage to an engine might be pointless. Honestly, do you know anyone that has had to do major work on a late model engine? cam shafts, crankshafts, rod bearings or other mechanical components that could be related to lubrication? I have not and vehicles run 200,000 miles with little engine related issues. Modern oils are so much better and engines are light years ahead of engines from only 20 years ago.