quote:
Originally posted by carl97ss:
I did a search and I see that info is not readily availible...
carl,
When I first bought my Duramax I sent emails to AC Delco, Baldwin, Wix and AMSOIL requesting filter % efficiency ratings in microns for their DMAX OIL filters. All responded except AMSOIL.
Here are the numbers I was quoted.
AC DELCO PF2232: 25 microns nominal, 40 microns absolute (Beta numbers not stated)
WIX 57202 13 micron nominal (50%, Beta =2) and 37 micron absolute (98.7%, Beta = 75)
Baldwin B1441: 8 micron nominal (50%, Beta =2) and 23 micron absolute (98.7%, Beta = 75)
AMSOIL SDF-52: No response - May be identical to B1441 since Baldwin is OEM for AMSOIL
Also, when I heard about the new M1-303 I contacted Mobil. They refered me to a Tech Support person at Champ Labs (OEM for the M1 filters) who quoted me the M1-303 specs.
You could try contacting Purolator for their beta specs...