Disclosed are fuel filters and process for removing sulfur-containing compounds from a post refinery fuel stream. In one embodiment, the disclosed process requires passing the post refinery fuel stream through a fuel filter to provide a clean fuel stream having a reduced concentration of sulfur-containing compounds relative to the post-refinery fuel stream, wherein the fuel filter comprises an adsorbent comprising an inorganic oxide having a surface acidity characterized by a pK.sub.a of less than or equal to -3.