Shell Rotella T6 5W40 Synthetic Oil 1qtThrough the use of Shell's most advanced technology, Shell Rotella T6 5W-40 synthetic heavy duty engine oil offers enhanced fuel economy capability of 1.5%* that can save money in fuel consumption, without compromising engine protection or durability. Shell Rotella T6 5W-40 full synthetic provides a significantly increased level of protection against harmful engine wear when compared to previous generation API CJ-4 synthetic engine oils. The advanced multi-functional dispersant additives in combination with synthetic base oils provide an enhanced level of protection against the effects of soot, dirt and other contaminants in heavy duty diesel engines. Features Enhanced Wear Protection: Provides significantly improved protection against harmful engine wear compared to previous generation API CJ-4 engine oils.; Improved Deposit Control: Advanced multi-functional dispersant additives help prevent the formation of harmful deposits and sludge, ensuring cleaner engine operation.; Low-Ash Formulation: Helps control the blocking or poisoning of exhaust after-treatment devices, maintaining the efficiency of emissions systems.; Low-Temperature Flow: Offers improved low-temperature flow compared to conventional 15W-40 oils, facilitating easier starts and reducing engine wear during cold starts.;