I'm current using Mobile1 0-40 European Formula. Previously I used Mobil1 5W-50 and it received stellar results in the Blackstone results testing. This was after using "normal" 0-40 Mobil1 and getting slightly low viscosity readings in the previous Blackstone test. However, after learning the story (see below) about the "normal" 0-40 Mobil1 I decided to give the European Formula version a chance this time.

A while back Mobil changed the "normal" Mobile1 0-40 to a different formulation, both in its base and its additives. The base is now formed using something called GTL (gas-to-liquid) technology which can be made with lower production costs. While Porsche allowed it to retain the A40 rating, Nissan and some others removed their certifications for this version of the oil for their high end cars like the GT-R.

The European Formula version (clearly marked as so on the front) is now apparently a significantly better oil than normal Mobil1 0-40. They cost the same in a store so be sure to check the labels. Napa carries the European Formula (and the other) while many other retailers do not.

 

Here is a link to an interesting report comparing oils done just last December (PDF) from another thread on Rennlist: https://rennlist.com/forums/attachme...l-data-txt.pdf

 

Maybe just me but I don't get this oil debate. If there is a brand that is better than another then why wouldn't Porsche recommend it? I stick with std mobile 1 and have not had any problems.

 

Others have postulated that Porsche's motivations aren't completely pure (only engineering taken into consideration, e.g.) as a product endorsement usually has the benefit of remuneration, of one sort or another.

 

I use Millers Nanodrive CFS 10w50 after my engine rebuild by Hartech.

 

Yeah... Porsche says Mobil 1 0w-40 is the factory fill oil then provides a list of approved oils that runs several pages.

If Exxon-Mobil pays Porsche anything it is stupid given the number of other oils on the approved oils list. And if the other oil makers pay Porsche anything to get on the list they are stupid too.

And to believe that Porsche makes more money (any money) selling space on its oil list rather focusing 100% on making good cars and doing what it can with its servicing recomendations to help keep these on the road is just being silly.