Shell Rotella T5 15W-40 Synthetic Blend diesel engine oil with Triple Protection Plus technology uses synthetic base oils plus advanced additive technology to provide protection against wear, deposits, and oil breakdown. Triple Protection Plus technology offers better low-temperature flow, which delivers excellent equipment protection, long engine life, and maintains viscosity control under high temperatures. The premium synthetic base oil components help improve cold starting and low-temperature performance without compromising engine protection or durability. Shell Rotella T5 15W-40 goes beyond CK-4 wear limits, delivering an average of 37% better than the maximum wear requirements (calculated average based on API CK-4 wear test results). It's suitable for a wide range of heavy-duty engine applications, and is an excellent choice for on-highway fleets, construction, agriculture, and diesel pick-up trucks, including high-power vehicles where resistance to increased heat and stress is required. (*Shell Rotella Limited Warranty: Valid up to 10 years or 300,000 miles (whichever comes first) if you exclusively use Shell Rotella T5 Synthetic Blend heavy-duty engine oil. Terms and conditions apply. See Rotella.Shell.com/warranty for details.)