Reviews of Shell engine oil

It's perfectly fine for the WRX, and it's what I use in mine, as well as its two previous owners. My car's maintenance records include two reports from Blackstone Labs detailing their examination of the Rotella T6 5W-40 oil and according to those the engine has worn very well on that oil

I personally swapped from 5w-30 in my OBXT to T6 5w-40 and have noticed a decrease in oil consumption (newish engine with 28k so that also helps).

I think factory recommendation is Rotella but honestly you can go with any high quality oil. I have used Rotella, Castrol, and Valvoline synthetics in my 500 and I honestly don’t think it matters.

I run Rotella T6 5-40 on my VR6 and also an 850 Turbo.

Rotella T6 5w-40

For instance, i use 5w40 she'll helix ultra, and it is thin 5w40 and it has ll01.

Whatever full synthetic is on sale, last time it was Rotella T6 15w40, every 5k.

I run t6 15-40 in my 07 lbz with the cat oil filter adapter.

I’ve been using t6 with pretty good lab analysis but I’ve been considering switching over to amsoil.

Since getting my tune I run Rotella T6 5w-40