I have about 4 quarts of the original Mobil1 ESP 0-W40. Is it compatible with the new Mobil1 Super car oil. Just want to be sure.

 

Are you referring to Mobil 1 ESP/ESP X3? If so, then the answer is YES, it is perfectly compatible with Mobil 1 Supercar.

 

As long as it has a Dexos2 certification, you are okay

 

What, exactly, is on the the label. And what is your definition of compatible? If you want to certain that it matches the dexos R specification, then you need to look for

either Mobil 1 Supercar 0W-40, or Mobil 1 ESP Formula 0W-40. Mobil 1 ESP Formula was dexos 2 approved, but it was renamed Mobil 1 Supercar which is dexos R approved. A currently it is the only 0W-40 motor oil that is dexos R approved. And dexos R approved (or equivalent some like to point out) is required for in model year 2023-2024. dexos 2 was required for model years 2020-2022 and dexos R can be used for that application. This does NOT mean that all dexos 2 approved motor oils meet dexos R. It means that Mobil 1 ESP Formula 0W-40 meets.

Its not clear what you mean by "original" mobil 1 0W-40, because there are a bunch of Mobil 1 0W-40 motor oils. Mobil 1 ESP x3 (which is dexos 2) , Mobil 1 ESP x4 (which does not display a dexos logo of any kind) , Mobil 1 European formula (no dexos logo), Mobil 1 FS (no dexos logo),










If by compatible you just mean can you mix them - I do not know. If it is not Mobil 1 ESP Formula 0W-40 (with that exact name on the label including the word Formula) then its formulation will not be exactly the same as Mobil 1 Supercar 0W-40.

 

Just checked the label and it is the ESP 0-W40 formula Dexos2

 

Then you're perfectly fine. I've run all 3 versions in my C8 (ESP, ESP X3, & Supercar).

 

Thanks Kracka

 

I assume that in the context of this thread, Mobil 1 ESP 0W-40 means Mobil 1 ESP Formula 0W-40. But Mobil 1 ESP 0W-40 and Mobil 1 ESP Formula 0W-40 are different motor oils with different numbers in their product data sheets. Mobil 1 ESP Formula 0W-40 is the one that became Mobil 1 Supercar 0W-40. I defer to others on whether it is ok to mix them.
I have attached the relevant PDS for each.

 

I've switched to extra virgin olive oil and none of my cars have had a cholesterol problem.

 

Adding some lard will help with smoking due to worn rings, and also will help to seal a bad rear main seal leaks when it hardens. It attracts hungry animals - like a rolling fried chicken food truck.

 

The first two items listed are Dexos2 certified and Supercar has the new Dexos R certification. Practically speaking, you can mix all three. Technically, one might say you shouldn't put the first two in a later model year C8, I believe 2023, where GM required Supercar with Dexos R which arguably "exceeds" Dexos2

 

X3 is actually the superior oil to Supercar.

I've run all 3; they'll all perform just fine across intended uses, in conjunction with a quality oil filter when following the oil life monitor.

There's a new X4 that I do not yet have experience with nor know much about.

 

X4 lost the Dexos 2/R. Probably just because they didn't pay for it.

 

Licensing under the dexos 2 spec is discontinued according to the gm dexos site. But they (Mobil) may not want x4 (which if formulated so comply with certain European spes) to comply with the dexos R spec. I am speculating - but here is why I suggest that as a possibility.

Consider, for example, the high temp high shear viscosity number. HTHS measures the viscosity (resistance to flow) of an engine lubricant at elevated temperatures under constant shear, simulating the narrow tolerances and high speeds between moving parts in a hot engine. The lower the measured HTHS viscosity of the oil, the greater the increase in predicted fuel efficiency.
However, higher numbers may reflect better engine protection under extreme conditions (this according to forum member posts). Some consider the higher number to be superior. Higher numbers appear to be favored in certain European specs. So it that is true, then that parameter reflects a trade off to be made between fuel economy and engine protection. It may be, and I do not know this to be fact, that the dexos R spec actually puts a limit on that number - that dexos 2 did not. Take a look at the numbers:

x3 3.8 dexos 2
x4 3.8 no dexos
ESP 3.76 dexos 2
ESP Formula 3.53 dexos 2
Supercar 3.53 dexos R

This is just an example. There could be other similar trade offs in the design of the different formulations. I make no comment about superiority. Just that different applications and the resulting specifications could involve different tradeoffs.

 

I don't think there is a dexos R limit on HTHS.

On the beginning (2011) in Europe there was one oil
ESP 0W-40 it has dexos 2 and Porsche A40 approvals beside Mercedes and few others.
At some point in time (2017) GM decided to derive new formula from it for use as factory fill in 2019 Corvette
and it is how they created ESP Formula latter renamed to Supercar - this oil have been marketed only in USA it is not available in Europe.
In the meantime at about the same time (2017) in Europe ESP 0W-40 have been replaced with new formulation called ESP X3 dexos 2 and Porsche C40
around same time GM sold european operation to Stellantis and finish manufacturing in Europe.
ESP X3 have been available in USA (same formula USA made) a little bit latter approx 2019.
Now (2024) ESP X3 which become in Europe mostly Porsche oil have been replaced with two new formulations
ESP X4 - Porsche C40 A40
C40 GT - Porsche C40 GT
Both of them doesn't carry dexos as there is no more GM operations in Europe and this oils becomes mainly Porsche oils as ESP Formula/Supercar becomes GM oil

 

Your point being, I think, that another reason Mobil does not submit those oils for dexos R licensing is there is no intent to market them in the US for use in GM cars, therefore no reason to pay the licensing fee. And, I think thats true as well. My example though was hypothetical, just to illustrate that there could be differences in the specs related to fuel economy or whatever. I do not have access to the actual dexos R spec, and can only see the advertised parameters. So, I do not know it is limited or not in the spec. What is known is that there is lots of discussion of limits on HTHS in the interest of fuel economy. There is this from the Lubrizol site:

"Original equipment manufacturers (OEM) are moving to lower HTHS viscosity engine lubricants for their latest engine hardware designs in order to deliver greater fuel efficiency."

I did not pull the thread further to find out the details of such limits or what specs they might appear in.

 

I get your point.
Personally I hope ESP X4 will be dexos R certified as
GM selling C8 in Europe there is recommendation in european manual for 0W-40 dexos R oil but
after ESP X3 0W-40 have been discontinued and
Supercar 0W-40 is not available in Europe there is no oil here to meet recomendation from manual and ESP X4 0W-40 looks the best candidate for certification.

 

You need to start editing your posts to say why you think it’s superior and say you believe it is superior. Mobil may not agree with your statement. We do not know the difference in chemistries. The ratio of pao to ester could be different which might make the S-C more ideal for this application.

 

There is minimum HTHS limit in dexos R on all grades.
0W-40 HTHS @150°C >= 3.5
so one mystery solved definitelly.
Below excerpt from specification.

Generally OEM moving to mid SAPS and Lower Viscosity where they can move.
Performance engines needs high HTHS.

 

Thanks for finding that! Now I know where to get it - although it looks like it has to be purchased. I see a Feb 2021 version of it for dexos R, and another Feb 2023 version, is the current "active" version. Interesting that there are two versions. I did not buy it (yet). But, I wonder if there were any changes to the spec between the 2021 and 2023 versions?

So, on the HTHS, looks like no upper limit on the page you posted - just a lower one 3.5.