Royal Purple Duralec Super 15W-40

Royal Purple Duralec Super motor oil is a high performance engine oil made for emission-controlled diesel engines utilizing emissions equipment such as: DPFs, Catalytic Converters, EGR, and SCR injection. It is an API CK-4 engine oil. Duralec Super motor oil is specifically formulated to maximize component life, extend drain intervals and improve fuel performance. These premium lubricant formulations provide excellent high temperature resistance and low temperature pumpability, outstanding soot dispersancy, improved rust and corrosion protection, and prevention of varnish and sludge formation.