Fubex DEO 5W-40 CI-4 Diesel Engine Oil

The DEO 5W 40 Cl-4 is a one of a kind universal oil that works both as a gasoline engine oil and a diesel engine oil. The Oil is fully synthetic and comes with great detergent and dispersant properties to ensure engine cleanliness. It is suitable for all vehicles, gasoline and diesel alike, and has great capability to neutralize acid.






Protects the Engine from wear and tear

Ensures Engine Cleanliness


The ZEXER 5W 40 Cl-4 synthetic diesel engine oil has a wide application range. It is suitable for both gasoline engines, turbo and four valve alike, as well as diesel engines for passenger cars and heavy trucks

API performance Level

ACEA A3/B4-98 MAN 271
ACEA E2-level  MB 228.1
API CI-4 MTU Oil Category 1


Parameters Test Methods Unit Result
Density at 15 ASTM D4052 g/ml 0.881
Kinematic Viscosity at 40 ASTM D445 mm²/s 100
Kinematic Viscosity at 100 ASTM D445 mm²/s 14.0
Pour Point ASTM D6892 -33
Flash Point ASTM D92 228
Viscosity Index ASTM D2270 142
B.N (HClO4 Method) ASTM D2896 mg KOH/g 7.6
CCS viscosity at -20°C ASTM D5293 mPa.s 6800
Sulfated Ash ASTM D874 Mass % 1.15

The DEO 5W 40 Cl-4 diesel engine oil is a multi viscosity oil as it has lesss vviscosity at low temperatures (as indicated by the 5W) but it thickens as temperature increases. At high temperatures it has the viscosity rating of ‘40’ which is pretty high. Therefore the ZEXER 5W 40 Cl-4 fully synthetic diesel engine oil is a multi viscosity engine oil.

5W-40 is cl-4 is a unique grade as it is a multi viscosity grade. The oils in this grade, such as the  DEO 5W 40 Cl-4 diesel engine oil have low viscosity in low temperatures but thicken up as temperatures increase. This means that these oils perform well in both hot and cold temperatures. The Cl-4 specification tests oils in a vast number of parameters such as Emission control, wear protection, soot handling, oxidation and thermal stability and compatibility with diesel engines, setting it aside from other specifications.

The DEO 5W 40 Cl-4 fully synthetic diesel engine oil  is applicable to nearly all vehicles, including gasoline and diesel engines, turbo as well as four valve. However, it still does not 100% apply to all types, so make sure to consult your user manual before using.

The The DEO 5W 40 Cl-4 synthetic diesel engine oil has a low viscosity at low temperatures so provides a cold start, and a high viscosity at high temperatures so provides a thick film. Therefore it is very much suitable for extreme weather conditions.

Mixing the DEO 5W 40 Cl-4 diesel oil , while possible, I not recommended as it may damage your engine. Even when mixing, make sure to follow proper instructions

Oil change interval when using the DEO 5W 40 Cl-4 diesel engine oil  or any oil for that matter, depends upon your type of vehicle and how much you run it. There is no universal number for this.

Yes, you can use   DEO 5W 40 Cl-4 diesel engine oil in your older vehicle if your vehicle shows compatibility to the oil. Make sure to check your vehicle’s user manual for confirmation.

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