Amazon.com sells universal filter wrenches. I bought mine there, but you can also get them at other places. The one I got from Amazon was called the Lisle Import Filter Wrench, it fits most small to mid sized oil filters. For larger filters, I bought a large plier-style wrench from a local store called Meijer (similar to Wal-Mart, K-Mart, etc.). Last time I checked, K-Mart had some Pennzoil brand oil filter wrenches. I can't remember if Wal-Mart sells them...