Engine oil Shell or OEM Volkswagen

I bought a 153K kilometer 81 1.6 GTI and drove it for work to military bases all over Germany. With no restrictions I ran 160-190 kph as much as possible for a few hours at a time. It always used a little oil but I kept it changed with 20W50 dino oil and sold it at 280K still running fine.

36k miles and still not burning a drop between 10k OCI's. I use VW 0W-20 Full Syn 508/509 spec each and every time, until mobil1 releases a Full Syn clone. Noticed a "slight" increase in MPG's with the newer oil.

S52B32, 5W40 Rotella T6

I use rotella 15w-40 in every vehicle I own. From my Miata to my XJ, no issues

May get hate but I use in both of my is300s Shell Rotella T4 Triple Protection SAE 15W-40 Engine Oil the first oil change is nasty cause it has more detergent but after that you have much cleaner oil changes from that point forward.

Ran Rotella T6 5w-40 in my stage 2+ (and beaten to hell) WRX right up to 120k miles when I sold it.

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

Rotella T6 5w-40