Mobil Delvac ESP 5w40 vs M1 TDT 5w40

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What are the differences? Why use one over the other?

I couldn’t find an answer that wasn’t almost 10 years old and I’m sure things have changed.
 

5W40 TDT​

Properties and Specifications​

SAE 5W-40
Kinematic Viscosity @ 100 C, mm2/s, ASTM D44513.7
Kinematic Viscosity @ 40 C, mm2/s, ASTM D44583
Density, 15.6C, g/cm3, ASTM D40520.853
Flash Point, Cleveland Open Cup, °C, ASTM D92234
Pour Point, °C, ASTM D97 -48

Mobil Delvac 1™ ESP 5W-40​

Properties and Specifications​

SAE 5W-40
Kinematic Viscosity @ 40 C, mm2/s, ASTM D44584
Kinematic Viscosity @ 100 C, mm2/s, ASTM D44513.8
Cold-Cranking Simulator, Apparent Viscosity @ -30 C, mPa.s, ASTM D52936510
Mini-Rotary Viscometer, Apparent Viscosity, -35 C, mPa.s, ASTM D468416800
Hi-Temp Hi-Shear Viscosity @ 150 C 1x10(6) sec(-1), mPa.s, ASTM D46833.8
Viscosity Index, ASTM D2270150
Ash, Sulfated, mass%, ASTM D8741
Total Base Number, mgKOH/g, ASTM D289612
Pour Point, °C, ASTM D97-48
Flash Point, Cleveland Open Cup, °C, ASTM D92233
Density, 15.6C, g/cm3, ASTM D40520.852
 
Looks like it is within the same tolerance from the data that is available above on both oils.
Which make sense, because they should be within the same specification.

Unfortunately, we would not know how it will behave once it is in your engine but the engine probably don't care, for either one.
 
dlundblad,

the similarity is obvious and I was a long time user of Delvac 1 5w-40 - TDT in the US

For your interest I have used Delvac 1 LE 5W-30 in recent years- the details are below;

Vis 40C =69
Vis 100C =11.8
VI =168
SA =1
TBN =10
PP =-45C
FP =234C
Den =855

ACEA E6, E7, E9
API CJ-4/SN
MB 228.5/228.31/235.28
DD 93k218
CAT ECF-3
And several others

Is this lubricant available in the US?

Doug
 
Yes Doug, it is available in the US now. I use with great UOA results in my 09 BMW X5 35d which is is “emission system deficient”. Even before the “surgery”, the factory recommended C3 based oil (?LL08?) did very poorly as far as TBN and wear metals, due to NOx acidification in turn due to EGR.
 
Yes Doug, it is available in the US now. I use with great UOA results in my 09 BMW X5 35d which is is “emission system deficient”. Even before the “surgery”, the factory recommended C3 based oil (?LL08?) did very poorly as far as TBN and wear metals, due to NOx acidification in turn due to EGR.
It’s discontinued. Replaced with Delvac ESP 5w30
 
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