For awhile I've been looking for a drop in replacement air filter made of synthetic nanofibers to get better air cleaning which would reduce the amount of dirt which gets into the PF engine oil shown as silicon in used oil samples.
One of the best filters on the market for transport trucks is Donaldson which uses a patented nanofiber filter media, so I phoned them but they don't make air filters for PF sized trucks. What they did tell me though was that they partnered with Amsoil who make light duty vehicle filters using the Donaldson filtering media.
Here's a few links about the Amsoil EeA air filters using the Donaldson filter media;
http://www.amsoil.com/products/ea_filte ... ?zo=515729
http://www.amsoil.com/storefront/eaa.aspx?zo=515729
The Amsoil EeA type air filter part number for both the V6 and V8 PF is EAA104.
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