Just bought a Napa Gold/Wix oil filter for a Dodge 5500 2 ton. The Wix site says is fits 6.7 Cummins 3500,4500, & 5500. It has the filter number 57620XE and the site says it can be used insted of the regular number 57620. The XE filters down to 14 microns and the regular down to 20 microns. My questions are; does anyone know what filter medium is in the XE? Will Wix/Nappa Gold be producing these XE filters to fit more cars and trucks? I have understood that Wix makes the high efficency Amsoil filters and I wondered if these XE Wix/Napa are the same or close?