All-season designed the best nano-technology high-tech wear protection Castrol GTX Magnatec Full Synthetic 0W-20 oil composition, one of a kind! Much outperforms all-season 5W-20 for the winter temperatures to the specs. The most wear occurs in winter temps. Chemically treats critical components of the engine. This lot features convenient setup of 6 separate single quart jars, which makes enough for any 4, 6 or 8 cylinder motor. That way you may extend oil change intervals considerably and not to a detriment to the mechanical performance. Protect your engine the best way possible, not so-so!