Ford Genuine Fluid XO-5W40-5QSD SAE 5W-40 Full Synthetic Diesel Motor Oil - 1.25 U.S. Gal (4.73L) It satisfies the warranty requirements of Ford Motor Company as well as most other domestic and import diesel engine manufacturers High-quality diesel engine oil formulated with synthetic base oils and unique additive technology Designed for new generation, low emission diesel engines Can be used in older engines where the manufacturer recommended API categories CD, CF-4, CG-4, CH-4, CI-4 and CI-4 plus Recommended for use in power stroke diesel engines over a wide temperature range, from -20F (-29C) to over 100F (38C)