Shell Rotella T6 15W-40 diesel engine oil is a full synthetic motor oil that features exclusive Triple Protection Plus technology, formulated with fully synthetic base oils plus advanced additives to protect against wear, deposits, and oil breakdown. It offers better cold cranking properties and low-temperature pumpability at -15C compared to conventional and synthetic blend Shell Rotella 15W-40 products. It also delivers improved wear performance versus API CJ-4 technology, extended drain capabilities for more uptime, improved protection against oxidation for increased fuel economy, compatibility with exhaust emissions control systems, and protection in extreme operating conditions and climates. Shell Rotella T6 15W-40 is suitable for use in new and older diesel-powered vehicles, from Class 8 tractor/trailers to heavy-duty pickups and delivery, utility, and school bus fleets. Shell Rotella T6 is backed by a limited warranty valid up to 15 years or 500,000 miles (whichever comes first), guaranteed*. (*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.)