Mobil Delvac Legend™ 1640

legend 1640

Monograde Heavy Duty Engine Oil

Mobil Delvac Legend™ 1640 is an extra high performance diesel engine oil formulated from advanced base oils and a balanced additive system to meet or exceed the demanding specifications of the world's leading builders of diesel engines. It is recommended by ExxonMobil for use in intercooled, highly turbocharged engines requiring SAE 40 grade engine oil.

This product is fully compatible with Mobil Delvac 1640 and can be used as a replacement of same.

Mobil Delvac Legend™ 1640

Monograde Heavy Duty Engine Oil

Features and Benefits

Tighter engine designs reduce oil consumption, resulting in less fresh oil make-up to replenish depleted additives. Higher piston top ring positioning brings the oil film closer to the extreme combustion temperatures increasing thermal stress on the lubricant. Higher fuel injection pressure and retarded timing improve burn efficiency, but also increase engine part loading, temperatures, and soot in the oil under such extreme conditions. Mobil Delvac Legend 1640 is designed to provide exceptional performance in diesel engines. The key benefits include:



Advantages and Potential Benefits

Outstanding protection against oil thickening, high temperature deposits, sludge build-up, and oil degradation.

Outstanding control of high temperature deposits.

Extended oil life.

Excellent protection against ring sticking.

Exceptional wear protection.

Reduces maintenance costs and extends engine life.

Excellent soot handling capabilities.

Maintains viscosity control and reduces wear.



Recommended by ExxonMobil for use in:

•  Diesel-powered equipment from leading diesel engine manufacturers.

•  On-highway light and heavy-duty trucking.

•  Off-highway industries including: construction, quarrying, and agriculture.

•  Mixed diesel and gasoline fleets.


Specifications and Approvals

This product has the following approvals:


MTU Oil Category 2


This product is recommended for use in applications requiring:

ACEA E2-96 Issue 5



MAN 270


Properties and Specifications




SAE 40

Kinematic Viscosity @ 40 C, mm2/s, ASTM D445


Kinematic Viscosity @ 100 C, mm2/s, ASTM D445


Density @ 15.6 C, g/cm3, ASTM D4052


Pour Point, °C, ASTM D97


Flash Point, Cleveland Open Cup, °C, ASTM D92


Total Base Number, mgKOH/g, ASTM D2896


Ash, Sulfated, mass%, ASTM D874


Viscosity Index, ASTM D2270



Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @