Prime Guard ROTLT6540GL Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 1 Gallon

The Prime Guard ROTLT6540GL is a 1-gallon container of Shell Rotella T6 Full Synthetic SAE 5W-40 Heavy Duty Diesel Engine Oil (Shell part number 550045347). Formulated with fully synthetic base oils and advanced additive technology, this oil delivers Shell's exclusive Triple Protection Plus technology — guarding against wear, deposits, and oil breakdown while improving low-temperature flow and fuel economy.

Key Features:

• Full Synthetic Formula: Synthetic base oils provide outstanding protection across a wide range of operating temperatures
• Triple Protection Plus Technology: Simultaneous defense against wear, harmful deposits, and thermal oil breakdown
• Improved Fuel Economy: Enhanced fuel economy capability of up to 1.5% compared to conventional 15W-40 oils
• Superior Wear Protection: Significantly increased protection against engine wear versus previous-generation API CJ-4 oils
• Advanced Deposit Control: Multi-functional dispersant additives combat the effects of soot, dirt, and other engine contaminants
• Emissions System Compatibility: Low-ash formulation helps protect exhaust catalysts, DPFs, and other after-treatment devices
• Extreme Temperature Performance: Free-flowing synthetic base oils ensure reliable cold-start pumping while maintaining viscosity under high heat
• Outstanding Shear Stability: Resists viscosity loss through shear to maintain optimal oil pressure throughout the service interval

Industry Specifications Met or Exceeded:

• API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4
• ACEA E11
• JASO DH-2, MA, MA2
• Cummins CES 20086, 20078
• Volvo VDS-4.5, VDS-4
• MACK EOS-4.5
• Caterpillar ECF-2, ECF-3
• Allison TES-439
• Detroit Fluid Specification (DFS) 93K222, 93K218
• MAN M3575
• Ford WSS-M2C171-F1

Cross-Reference / OEM Part Numbers: Shell 550045347

This full synthetic 5W-40 engine oil is well-suited for heavy-duty diesel applications including Class 8 tractor-trailers, heavy-duty diesel pickup trucks, delivery fleets, utility vehicles, school buses, and select motorcycles — both new and older equipment.