SFR Synthetic Blend 15W40 motor oil can be used in all diesel engines. Check your vehicles owners' manual for the correct amount of motor oil to use. SFR Synthetic Blend 15W40 is fully treated with SFR oil fortifiers for maximum performance. SFR Synthetic Blend base lubricant is compliant with CK-4 Plus diesel specifications for extended drain intervals. It contains low sulfur and phosphorus additive levels to meet the latest EPA regulations. Gallons also have a view stripe with measuring grid on the side of the container for measuring larger quantities for quick use.