ECOGARD X5476 Cartridge Engine Oil Filter for Conventional Oil - Premium Replacement Fits Cadillac CTS COMPATIBLE with 2003-2004 Cadillac CTS. BUILT for both SYNTHETIC AND CONVENTIONAL OILS. Proven to drive up to 5,000 miles between oil changes with confidence. GREATER ENGINE PROTECTION by optimally screening out 97% of harmful contaminants such as such as carbon, sand, dust and bits of metal before they can get into your oil. HASSLE-FREE INSTALLATION with included O-rings for housing and cap. INSTALLS EASILY with included instructions. Replaces: FRAM CH9447 Purolator L35476 WIX 57079 OE 88894390.