I disagree with you on your interpretation, but it is your interpretation, so I respect that. I will try to be more clear next time, and dig out the filters next week and get the numbers off of the can for you on the date code.
It's not odd to me in my experience for any manufacturer in general to not reach the efficiency claims they make. Changes in model name, material suppliers, material countries of origin, changes in production facilities, changes in brand owners, manufacturing machine adjustments, new employees, new management, poor QC/QA control practices,....I could go on and on with respect to this topic. Most manufacturers know this, and now you do to.
I suppose do to all the negative fighting on here, I will just post the final video as promised and call it.
My intention for all of this is to be first and foremost fun and informative, for all of us engine maintenance guys and gals out there trying to keep our equipment running as long as possible. I have learned, talked to some great folks including yourself via Bob, and have very much enjoyed all of our conversations.