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Considering the cost of an engine I am probably going to stick with K&N or Mobil one from now on, but I have bought one of each and I am getting ready to run a pressure test comparison between them and the Quaker State (Really its a Fram in disguise) that I was forced to buy recently at the oil change place I used (I use to use that is).
I have read that the oil pressure is measured after the filter and I am starting to think some of the oil pressure problems and engine bearing damage and wear is being caused by plugged up filters, and / or leaking filters (antidrain back valves opening and leaking back to crankcase while the engine is running reducing the flow and pressure to the bearings and the presure gauge) in addition to all the other problems others have posted about the cardboard end caps.
I am also preparing to upgrade my oil filter adapter to allow me to use the larger oil filters.
I have read that the oil pressure is measured after the filter and I am starting to think some of the oil pressure problems and engine bearing damage and wear is being caused by plugged up filters, and / or leaking filters (antidrain back valves opening and leaking back to crankcase while the engine is running reducing the flow and pressure to the bearings and the presure gauge) in addition to all the other problems others have posted about the cardboard end caps.
I am also preparing to upgrade my oil filter adapter to allow me to use the larger oil filters.