Originally Posted By: SuperBusa
Originally Posted By: bmwtechguy
Something I noticed about the filters that Purolator makes, they rate their filter's own efficiency right on the side of the box. IIRC, the Premium Plus is 96%, AA Total grip is 94% Bosch Premium is 98% and the PureOne is 99.9%
Percent of what? is my first question, but since it is their own ratings being compared here, it may be possible that these numbers do really indicate the relative efficiency of the different media used in each.
It's the percent of filtering efficiency - not hard to understand. Do some searching on the 'net (Google is your friend
). Yes, the higher the efficiency percent, the better the filter removes contaminates from the oil. The tests are ran per SAE test specs, so it's not really "their own rating".
..but if they don't state where the % of efficiency is on all the boxes, what does it mean?
Just about every filter is Beta100=1000.
Han: What's the % of filtering?
Luke: Well, it's so good ..it's..it's ..well it's more than you can imagine!
Han: I don't know. I can imagine quite a bit.