Originally Posted By: ltslimjim
However, what does FRAM state the efficiency rate @ 20 micron is?
The efficiency percentage varies some depending on filter model.
http://fram.com/products/oil_filters/product_list
The Ultra is shown in the flag note as:
FRAM Group testing of average filter efficiency and dirt holding capacity using FRAM XG3387A, XG8A, and XG4967 and their leading economy filter model equivalents under ISO 4548-12 for particles > 20 microns.
All of the filters listed on their website say " ... under ISO 4548-12 for particles > 20 microns."
However, what does FRAM state the efficiency rate @ 20 micron is?
The efficiency percentage varies some depending on filter model.
http://fram.com/products/oil_filters/product_list
The Ultra is shown in the flag note as:
FRAM Group testing of average filter efficiency and dirt holding capacity using FRAM XG3387A, XG8A, and XG4967 and their leading economy filter model equivalents under ISO 4548-12 for particles > 20 microns.
All of the filters listed on their website say " ... under ISO 4548-12 for particles > 20 microns."