Just drive it and put the so called correct oil in the next oil change no big deal.

 

There is a difference. Mobil claims to have spent a lot of time and effort to develop the new ESP "stuff" to meet the GM spec. Our resident oil expert "LDB" who posts said when he was still working the "viscosity Improvers," which are added to "0" weight oil to get it to hold viscosity at higher temps to match 40 weight, so it can be called 0 - 40 tend to degrade over time and within 3000 to 4000 miles will not hold to the 40 weight equivalent viscosity. (I may not have said that with perfect accuracy- but essentially than is what happens.) He said that just means it could be more like 30 weight BUT GM would not say that was good for Tracking, for example.

So yep, the European formula may not maintain the properties GM requires (or they would probably have approved in before.) There is also the ash issue that was mentioned that allows the ESP oil to meet a more severe Diesel spec. Bottom Line: The products aren't the same.

SIDE BAR
I'm remined of STP, which my friend who woked for Exxon said they supplied to STP. According to him it was essentially their viscocity improver. Remember when a Car burned oil you added that "Stuff." I also recall his comment about STP having little investment in the product other than extensive advertising. He said they shipped the product in tank cars to a bottler who filled and labled the bottles that were shipped directly to retailers and perhaps wholesale oil distributors.

I also recall their test to "prove it worked." It had nothing to do with a car! You dipped a screw driver tip in the STP then tried to hold it with two fingers. It was adverted as being "so slippery" you couldn't hold it. In essence, it was so viscous your figners never touched the screw driver. The reson the "test" worked was it so viscous and your fingers never touched the screw driver tip that it slid over itself!

 

Just swap out for the "correct" oil and go on. Rots of Ruck with the refund, though! Chalk it up to experience.

 

After I hung up on the brain dead customer service voice at GM, I spoke to my Vette tech at my dealer. Needless to say, he agreed that it should have been ESP. Shortly after, I received a call from someone at GM who knew what he was talking about. He understood that the dealer in Indiana put the wrong oil in and said he would work with that dealer to get me a REFUND. I was told that this would take 3 to 4 days to resolve.

 

Have a sworn, witnessed statement from them to show to Chevrolet.

Forget about it. Your engine certainly won't know any difference in the oils.

 

Destroy the cats? How would that even happen if the car isn't burning oil. How much oil could the cats possibly be exposed to?

 

ESP line of Mobil oil are very catalytic converter friendly...especially but not limited to diesels.
https://mobiloil.com/en/motor-oils/mobil-1/mobil-1-esp

No harm will come to his catalytic converters in this application.

 

It’s only Chevy. Use cheapest oil you can find.

 

 

Don't the European C7s use the European formula Mobil 1 0w40?