BigAl:
The media Champ uses for the ACDelco filter is a high efficiency one.
Is it the "highest"..nope.
But "marketing" types can blag on about high efficiency all they want. The question is..compared to what? or who'se filter?
Typically you will find something like "standard" filter performance chart or something on the filter packaging or website versus their "high efficiency" one. What is never explained to you is what is their criteria for a "standard" filter.
You assume it's the current low price filter widely available.
But is it..
Chances are it is media tests performed years ago on the "standard" cellulose element. So they compare a newer version to and older one. Or a competitors older one. Or, as is the case generally, a media used outside the USA. As those medias tout life. Which is generally at the expense of efficiency.
So the company using such figures and tests on their packaging or websites do indeed have "tests" to prove what they claim.
What you infer or what you assume are more than likely two different things. Unless you get a specific test of Brand A v Brand B as sold today.
The media Champ uses for the ACDelco filter is a high efficiency one.
Is it the "highest"..nope.
But "marketing" types can blag on about high efficiency all they want. The question is..compared to what? or who'se filter?
Typically you will find something like "standard" filter performance chart or something on the filter packaging or website versus their "high efficiency" one. What is never explained to you is what is their criteria for a "standard" filter.
You assume it's the current low price filter widely available.
But is it..
Chances are it is media tests performed years ago on the "standard" cellulose element. So they compare a newer version to and older one. Or a competitors older one. Or, as is the case generally, a media used outside the USA. As those medias tout life. Which is generally at the expense of efficiency.
So the company using such figures and tests on their packaging or websites do indeed have "tests" to prove what they claim.
What you infer or what you assume are more than likely two different things. Unless you get a specific test of Brand A v Brand B as sold today.