I remember someone did a very nice oil filter study in the past with many, many pictures. I believe the person was a subaru owner, if someone has the link to that study that'd be super.
quote: Originally posted by T-Keith: Very very old, but I give it credit for inspiring others. Most of that info is out of date, especially the Purolator and champ filters.
Awhile back there was an oil filter study that gave the micron ratings of each filter. Now I cannot find the site. Does anyone know of anysite/test that gives a list of micron ratings?