Shell Rotella T6 5W-40 diesel engine oil is a full synthetic motor oil that features exclusive Triple Protection Plus technology. It s formulated with fully synthetic base oils plus advanced additives to protect against wear deposits and oil breakdown. It also provides better low-temperature flow and enhanced fuel economy performance of 1.5% (compared to 15W-40 oils). Shell Rotella T6 5W-40 is suitable for new and older diesel-powered vehicles from Class 8 tractor/trailers to heavy-duty diesel pickups delivery utility school bus fleets and motorcycles. It provides a significantly increased level of protection against harmful engine wear (compared to previous generation API CJ-4 engine oils) and the advanced multi-functional dispersant additives offer an enhanced level of protection against the effects of soot dirt and other contaminants. (*Shell Rotella Limited Warranty: Up to 15 years or 500 000 miles whichever comes first guaranteed if you exclusively use Shell Rotella T6 Full Synthetic heavy-duty engine oil and meet enrollment mileage and vehicle manufacture date requirements. Enrollment required. Keep your receipts. Other conditions apply. See Rotella.com/warranty to enroll and for full details and terms.)