Mobil 1 Formula M 5W-40 is made with a proprietary blend of high performance components and synthetic baseoils. Mobil 1 Formula M 5W-40 has been designed to help deliver outstanding overall performance and protection. Key features and potential benefits include:

Features 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 all driving styles and conditions, from mild to severe.


Mobil 1 Formula M 5W-40 is approved against Mercedes Benz MB-229.5.

  • It is not recommended for 2-Cycle or aviation engines, unless specifically approved by the manufacturer.


Mobil 1 Formula M 5W-40 has the following builder approvals:
MB-Approval 229.5
MB-Approval 229.3

Typical Properties

Mobil 1 Formula M 5W-40
SAE Grade 5W-40
Viscosity (ASTM D445)
cSt @ 40ºC 79
cSt @ 100ºC 13.2
Viscosity Index 168
Sulphated Ash, wt% (ASTM D874) 0.90
HTHS Viscosity, mPa•s @ 150ºC (ASTM D4683) 3.7
MRV @ -35 C , cP (ASTM D4684) 25,981
Total Base Number , mg KOH/g ( ASTM D2896) 8
Flash Point, ºC (ASTM D92) 228
Density @ 15.6 ºC, g/ml (ASTM D4052) 0.85


5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Mobil 5/40
I use it in my 2004 Corvette. Oil temp in stop and go traffic is slightly better, and oil psi better by 3-4 psi.
January 29, 2019
1 year ago
Mobil 1 formula M 5w-40
Great oil, fast shipping!
January 29, 2019
1 year ago


Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 2 questions Browse 2 questions and 13 answers
Why did you choose this?
The Lubricant Store Store
correct oil for mercedes e550
Mark P on May 13, 2019
correct oil for mercedes e550
Mark P on May 13, 2019
How many miles with 5w-40?
A shopper on Aug 4, 2018
BEST ANSWER: The Mobil techs don't like giving recommendations on how many miles because it would depend on the size engine, fuel consumption, how hard you're working the engine, etc.