Mobil Delvac 1TM 5W-40

Advanced Full Synthetic Engine Oil

Mobil Delvac 1™ 5W-40 is a fully synthetic high performance heavy duty diesel engine oil that helps towards long engine life while providing long drain capability for modern diesel engines operating in severe applications. Mobil Delvac 1 5W-40 delivers excellent performance in modern low emission engines, including refrigerated units, as well as older, well-maintained engines. Mobil Delvac 1 5W-40 is recommended for use in a wide range of heavy-duty applications and operating environments found in the on-road transport and off-road mining, construction, and agricultural industries. Mobil Delvac 1 also meets the requirements of the API SL specification for gasoline engines used in mixed fleets. The excellent performance of Mobil Delvac 1 5W-40 is the result of extensive cooperative development work with major equipment builders and application of advanced lubrication technology.

Many modern, low emission diesel engines generate more soot and operate at higher temperatures than older engines. This significantly increases the need for high performance lubricants. Current tighter engine designs reduce oil consumption, resulting in less fresh oil makeup to replenish depleted additives. Top piston rings are located higher, bringing the oil film closer to the combustion chamber and exposing the lubricant to severe thermal stresses. Mobil Delvac 1 5W-40 maintains outstanding performance at high temperatures. It is also fully compatible with conventional oils. The key benefits include:


FeaturesAdvantages and potential benefits
Meets or exceeds demanding specifications of major OEMsOne engine oil for mixed fleet operations.
Outstanding thermal and oxidation stabilityControl of low temperature sludge build-up and high temperature deposits.
Low volatility, excellent wear and bore polish controlGood oil consumption control.
Expertly formulated low viscosity formulationFuel economy potential1.
Exceptional low temperature pumpabilityEasier engine start-up and reduced wear.
Good resistance to corrosionHelps towards long life of critical wear surfaces.
Long drain capabilityHelp towards operational efficiency and overall cost control.
Component compatibilityLong gasket and seal life, extended service intervals.

1Relative to conventional 15W-40 engine oil. Actual fuel economy improvement is dependent on vehicle/equipment type, outside temperature, driving conditions and your current fluid viscosity.