I usually pick up a 6 quart case at Sam's Club for $23.25 U.S. I've also picked up the filter at Kragen (13.99U.S.) Napa(16.99U.S.) Suprisingly I've gotten the filter the cheapest at the dealer. I have heard of a company called Timmons (mail order) they have the filter for like 12.00U.S. Talat 97 GLX Blk/Blk