2008 335i n54 Rowe vs Shell

[Alexis_c17]

Hello guys this is two analysis.
It's a bmw 335i N54 tuned (single turbo 550whp full e85) with 69500 miles for the first analysis and 75800 for the second.
The first is rowe hightec synth RS 5w40
The second is a Shell helix ultra mix (1/3 10w60 helix ultra 2/3 5w40 helix ultra).
The oil have done 6200 miles (10000km)
What is the best oil for my n54?

 

[Nathan]

Pourquoi avez vous faites une mix de 10w-60 et 5w-40?
Le Shell Helix 5w-40 c'est un des favorites ici alors c'est-ce que je vous recommendrais.
10w-60 viscosity est trop haut sans savoir ton usage. Peut etre au course avec les temperatures de 120C+.

 

[fantastic]

Whichever one you didn't mix. Probably just run the 10w-60.

 

[OVERKILL]

You can't determine that using UOA's.

 

[Alexis_c17]

Pourquoi avez vous faites une mix de 10w-60 et 5w-40?
Le Shell Helix 5w-40 c'est un des favorites ici alors c'est-ce que je vous recommendrais.
10w-60 viscosity est trop haut sans savoir ton usage. Peut etre au course avec les temperatures de 120C+.

i do this to have a higher viscosity at 100°C

 

[edyvw]

i do this to have a higher viscosity at 100°C

Alcohol will dilute oil.
If that is the goal, go with oil that has a higher viscosity, don't mix it, and preferably non-ester, PAO-based.
HPL 5W40 BAS would be an excellent choice.
You can try Mobil1 5W50, Motul Power 5W40 or 5W50.

 

[userfriendly]

i do this to have a higher viscosity at 100°C

Yes, but the oil sheared down to 12.8 @ 100C at drain time.
Maybe try 5w50 M1, API SP and perform a mid life UOA.