Delo® 400 LE SAE 15W-40 meets the requirements of new heavy-duty engines, protects older engines and reduces the levels of exhaust emissions in diesel engines. Formulated for outstanding performance with Ultra Low Sulfur Diesel, Delo 400 LE is backward compatible and may be used in older, conventional engines and gasoline engines. Delo 400 LE has been specifically designed to meet the demands of EGR engines while at the same time providing exceptional performance in conventional engines and other engine technologies like Caterpillar ACERT™.  Delo 400 LE is formulated with ISOSYN® Technology, which rivals synthetic lubricants in critical performance tests.