Then you are doing good, I guess. You did change the oil correct?I haven't heard any engine sound change, and I do give it a listen outside the vehicle about once a week. All I hear are the injectors firing, and the PCV activating periodically.
Perhaps my ear is just not tuned enough.
And did you end up putting the correct, new filter on?
Or are you going to do a short OCI on this one to get the "bits" out and change again?
That response was actually to wpod
Please cut open and spread the filter pleats out and take a few photos - some in natural sunlight and maybe some with a flash.
I would ask you to wash down the filter with acetone and reserve and weigh the particulate - but you are not in a lab environment.