my dad's mercury colony park, 1991 w 100k miles, was feeling anemic so one day, i bought Wix fuel filter and installed it (easy to do on american cars) and wow-car is a rocket again! my dad hadn't changed it in a very long time-over 5 years. i bought an AutoExtra from ebay (this is a wix for $6) and a motorcraft, as i plan to change this yearly and recommend to everyone on here to do.