
So the ones with the dirtiest paper were the bad ones? wouldn`t that prove that they collected the most contaminants?.....![]()
So the ones with the dirtiest paper were the bad ones? wouldn`t that prove that they collected the most contaminants?.....![]()
No, they are the ones that let the most contaminates pass through, in other words had less filtration. That paper was after the filter, it caught what the filter didn't.

Cool findings. I'm not saying this just because AMSOIL's filter did so well either. It is a good test to give everyone the info to make an informed decision the next time they purchase an air filter. Could this be put into a new thread for Air Filters?