Delo 400 XLE SB SAE 15W-40 is a synthetic blend, heavy-duty engine oil recommended for todays most modern on-highway low emission vehicles as well as older diesel engines. An ideal choice for various industries, including oil and gas, construction, agriculture, marine, and mining. Delo 400 XLE SB SAE 15W-40 provides the same level of protection as a 15W-40 although with a Synblend. Formulated for extended oil drain protection for both on- and off-road diesel engines and mixed fleets. Extended oil drain potential up to 1.5x, based on the average of U.S. Class 8 engine manufacturers recommendations.