Originally Posted By: BikeWhisperer
What is the efficiency of the Wix XP (Napa Platinum)?
I've read something quite low like 50% at 20 microns but I haven't seen it confirmed.
Fram claims 99% at 20 microns which is really good, that's why I got them lined up for my future oil changes on both my vehicles.
On the Wix website, it says B2 = 20 for filter #51334XP, which is the Wix XP synthetic filter spec'd for my car. B2 = 50%, so the way I interpret this info is that the filter has an efficiency of 50% @ 20 microns. I have also read posts on BITOG which stated that members have contacted Wix and were told that 50% @ 20 microns is the correct efficiency. So, if this information is in fact correct, I would choose to run the NAPA Gold filter instead, which has an efficiency of 95% @ 20 microns ... it is also much cheaper than the XP filter at regular price; however, if you want an extended drain synthetic filter, and you're only interested in either Wix/NAPA or FRAM, then I guess I would choose FRAM Ultra mainly due to its better filtering efficiency and lower cost as well.
What is the efficiency of the Wix XP (Napa Platinum)?
I've read something quite low like 50% at 20 microns but I haven't seen it confirmed.
Fram claims 99% at 20 microns which is really good, that's why I got them lined up for my future oil changes on both my vehicles.
On the Wix website, it says B2 = 20 for filter #51334XP, which is the Wix XP synthetic filter spec'd for my car. B2 = 50%, so the way I interpret this info is that the filter has an efficiency of 50% @ 20 microns. I have also read posts on BITOG which stated that members have contacted Wix and were told that 50% @ 20 microns is the correct efficiency. So, if this information is in fact correct, I would choose to run the NAPA Gold filter instead, which has an efficiency of 95% @ 20 microns ... it is also much cheaper than the XP filter at regular price; however, if you want an extended drain synthetic filter, and you're only interested in either Wix/NAPA or FRAM, then I guess I would choose FRAM Ultra mainly due to its better filtering efficiency and lower cost as well.