I need a recommendation (based on facts) concerning which synthetic oil (Rotella t6, Amsoil European, or Mobil 1) is best for an '04, 100K mile Cayenne Turbo? Don't wanna start a fight...keep it civil please. Thanks!

 

Motul 8100 xcess 5W-40 which is Porsche A40 approved.

 

Wow. Very clean and well cared for.
Congrats - and happy for new owners too!
What did you get?

Ps many Cayenne GTS going for more than your CTT - so glad it went to porsche enthusiast vs trade in.

 

^This...

 

I only use Mobil 1, 5W-50 in my '06 CTTS.

 

ANY oil that is A40 approved. Debating oil without data is silly. All the claims are anecdotal (I'm running XYZ 4.5W-52 and my car runs fine with it..) and basically valueless. See the website Bobstheoilguy for lots and lots and lots of debate on the worlds best oil (the debate has been ongoing for about 10-12 years now.)

 

AMS Oil 5W40 A40 approved is the best
https://www.amsoil.com/shop/by-produ...?code=AFLQT-EA

 

Motul ESS 8100 5-40W


That's what I have been using and it quieted my engine down. Smoother running. I think it runs slightly cooler.


However, I use 8 ounces of tuffoil at each oil change (twice a year). Allows her to rev freer, slight bump in HP and MPG.


Been running this way for over 130K. Passed 230K last week.


Passes EVERYTHING except a gas station and a Porsche Dealership! :-D


BTW, I get as much as 22.5 MPG


I swear she's getting faster not that I need it.

 

This oil is pure Honey, for the CTT:

 

>230,000 miles and she runs better than new.

 

I tried AMS Oil and it was OK, better'n Mobile One but not as good as Motul ESS 8100 using my auditory senses.