My dad bought a new used truck last night. While looking up misc. parts for the engine I started looking at NAPA's website oil filters. The specs on the Silver oil filter read that the ADBV was nitrile rubber. I then looked up the Silver for my truck engine and it read the same, nitrile rubber ADBV. I could have sworn that members on this board stated that the Silver oil filter had a silicon ADBV??????
http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Oil-Filter-Silver-/_/R-SFL31516_0327187232
http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Oil-Filter-Silver-/_/R-SFL31516_0327187232