I was trying to come up with a list of filters that have a filtering efficiency of greater than 90% at 20 microns. Mostly to see how filters stack up and to see which filter companies actually publish their efficiency and micron ratings. These are mostly ones I can get locally, but I would like to know other filters that may not be so easily available to me. So the ones I know are below:
Fram Extra guard
Fram Tough guard
Fram Ultra
Mobil 1
Old Pureone
Old Purolator Classic
Others that claim over 90% efficiency I know of but don't know at what micron rating are as follows:
New Purolator red can
New Purolator Pureone
STP blue
Stp Extended Life
Fram Extra guard
Fram Tough guard
Fram Ultra
Mobil 1
Old Pureone
Old Purolator Classic
Others that claim over 90% efficiency I know of but don't know at what micron rating are as follows:
New Purolator red can
New Purolator Pureone
STP blue
Stp Extended Life
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