Yeah ive seen those threads too. Ive been running royal purple/amsoil filters on ours without issue. Both are made by the same company. Initially when we bought the car, I tried the mobile1 filter and got some lifter tick. As soon as our amsoil supply came in, no more issues.Is that the oem oil filter? I read the thread about how rough the tibs can run on anything other than oem or k&n kinda seemed like snake oil to me but any truth there in your opinion?