You can discover the oil additives you need for your 2005-2006 Jeep Liberty 2.8L CRD, whether you need zinc break-in, stiction eliminating, stabilizing, or performance Oil Additives. Engine-specific products and general-purpose products are offered. Clean and protect components within the engine while restoring lost compression and horsepower. At XDP, you can find premium brands of additives like Lucas Oil, Hot Shot's Secret, Rev-X, XDP, and Hamilton Cams.