In March I put it a Powerflow filter on my 91 Saturn. I noticed that every morning or after my car has been sitting for about 10 hrs. I get a loud ticking sound from the engine during start up that lasted about 2 sec. I thought it was just because it has been cold. Now that it has warm up in the morning i'm still getting the same noise. Could this be because of a bad filter? I'm due for an oil change, so i might put a Wix filter in there to see if that would solve the problem.