Superlube TMS® heavy duty diesel engine oils combine select para-synthetic base stocks with proprietary additive chemistry, including an enhanced anti-oxidant package and a unique VI improver. This advanced formulation provides premium protection that has been proven in many engine types and extensive field service. Superlube TMS diesel engine oils are engineered for Tier IV and newer diesel engines with advanced emission control systems. These systems use exhaust gas recirculation, diesel particulate filters and SCR catalysts, all of which are sensitive to the wrong oil. High TBN and outstanding TBN retention give Superlube TMS reserve quality that provides excellent, backward-compatible engine protection in the most severe service conditions for both new and older diesel engines. Superlube TMS is proven to shield diesel particle filters (DPF) against ash buildup. In addition, this synthetic blend diesel engine oil provides improved engine protection from soot, deposits, varnish, wear, acid accumulation, viscosity shear loss and oil consumption, as well as excellent operability in extreme temperature environments. Expect excellent performance in these applications: • Four-stroke naturally aspirated and turbocharged diesel engines. • Tier IV and newer low emission engines with exhaust after-treatment devices. • Pre-2007 engines specifying older API or OEM oil performance categories. • When using ultra low sulfur diesel fuel and biodiesel fuel blends. • OEM listed by Volvo, Mack, Detroit Diesel, and Cummins.