BMW synthetic 5w-30 not a Group IV?

[orics]

Well, I just finished with my autorx rinsing phase so far here's my observation;

1. Cleaning-Autorx w/bmw 5w30 oil was dark after 2500 miles
compare to my regular OCI at 5000 miles w/ BMW 5w30 oil.
2. Rinsing-Autorx w/ castrol 10w40 conventional oil. Oil was
still clean or clear after 2000 miles. Oil is much better
shape compare to the autorx cleaning phase. Maybe it has
cleaned the engine during the cleaning phase.

*During my OCI I have observed that the engine is very hot,
Maybe because of the conventional oil that is used
during the rinsing phase, meaning car runs cooler w/ the
use of the synthetic oil.

thanks

 

[orics]

Anyone knows if Shell Rotella is grp. III or IV? My car has 37000 miles and is still under warranty. Im gonna be due for the free oil changes at the dealer on the nxt 4000 miles. After my warranty expire's Im planning to used either one of this oils and change it every 7500 miles; Amsoil 5w40, M1 0w40, GC, Elf LDX 5w40 or Total 5w40, this oils are all available on my neighborhood auto store. Any suggestion will be greatly appreciated.

Thanks

 

[Drivebelt]

Shell Rotella 5W-40 synthetic is a Group III based oil.