Mobil 1™ Formula M 5W-40

Advanced Full Synthetic Motor Oil

Mobil 1™ Formula M 5W-40 is an advanced full synthetic motor oil designed to help provide exceptional cleaning power, wear protection and outstanding overall performance. Mobil 1 Formula M 5W-40 is engineered to help prolong the life of both diesel and gasoline powered automobiles that require an oil that is approved against Mercedes Benz MB-229.5 specification.


Equipment lubricant recommendations

Our Mobil Serv℠ Product Selector tool will help you identify lubricant(s) for your specific equipment.

Data sheets

Features and Benefits

Mobil 1™ Formula M 5W-40 is made with a proprietary blend of ultra high performance synthetic basestocks fortified with a precisely balanced component system. Mobil 1 Formula M 5W-40 has been designed to help deliver outstanding overall performance and protection. Key features and potential benefits include:



Advantages and Potential Benefits

Active cleaning agents

Helps to reduce deposits and sludge build-up to enable long and clean engine life

Outstanding thermal and oxidation stability

Helps to reduce oil aging allowing extended drain interval protection

Low oil consumption

Less hydrocarbon pollution and less necessity to top-up

Excellent low temperature capabilities

Quick cold weather starting and fast protection. Also helps to extend engine life

High Viscosity Index

Excellent overall lubrication and wear protection performance for many driving styles and conditions, from mild to severe



Mobil 1™ Formula M 5W-40 is approved against Mercedes Benz MB-229.3 and 229.5


• Mobil 1™ Formula 5W-40 is not recommended for 2-Cycle or aviation engines, unless specifically approved by the manufacturer..


Specifications and Approvals

This product has the following builder approvals:

MB-Approval 229.3

MB-Approval 229.5


Properties and Specifications



SAE 5W-40

Ash, Sulfated, mass%, ASTM D874


Density @ 15 C, g/cm3, ASTM D4052


Density @ 15.6 C, g/ml, ASTM D4052


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


Hi-Temp Hi-Shear Viscosity @ 150 C 1x10(6) sec(-1), mPa.s, ASTM D4683


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


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


Mini-Rotary Viscometer, Yield Stress, -35 C, Pa, ASTM D4684


Total Base Number, mgKOH/g, ASTM D2896


Viscosity Index, ASTM D2270



Health and safety

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