ZINOL ULTRASYN PLUS diesel engine oil is suited for API CJ-4 emission norms requirements of newer diesel engines. It delivers extraordinary lubrication in diesel engines found in commercial, fleet and personal vehicles. Compounded with latest additive and synthetic base oil technology, the product exceeds the higher performance demands of modern engines. It withstands the stress of heat, soot and acids to help prevent deposits, corrosion and wear. With its broad viscosity range, it is ideal for winter and summer use. It can resist engine breakdown problems and can extend drain intervals when monitored by oil analysis.