Engine oil Castrol or Shell

Speaking of Rotella, Here's a personal observation of mine. My beater Saturn 1.9 has a lifter tick (not fixing it, don't care), so I just put in Rotella T, and it quiets it up a bunch!

ROTELLA T6 - Instantly i noticed a very nice purr from the motor. Its a heavy oil and with stabilizer (in this case thinner than the oil) It warmed up slower, meaning that it was absorbing more heat. No extra start up noise at all. The biggest gain from the Rotella was hot weather stability. It seemed to perform the best when you drove the car hard! Hot weather didnt affect the engines power anymore, and that made me really happy. Turbo lag was increased slightly, and the engine revved slightly slower, but remained perfectly stable. I loved this oil for protection, its really good for hot weather!

I've been running Castrol 5w40 in my car and have had no problems.

I'm running T6 in my car as well It's been great the last few changes, best oil I've used for my 1.8T and I have over 190k on my engine.

Jumpers, disc golf bag, sleeping bag, old winter jacket w/ wool socks, OEM jack w/breaker bar, 4 qt Rotella T6.

Castrol GTX 5W-30 with an STP filter. NY area. 178k miles with no HLA tick so far. Had some 10W-30 in it before during the winter and the car didn't like it too much, took over 3-5 tries cranking to get it started.

In my gen 3, I've used Castrol OE Professional 5w40 (the Castrol in the gold bottle that the dealer sells - oil has a green tint to it), both when I did the 5k mile change and when the dealer did the 10k change.

Used Castrol 0W-30 in the past with the GTI and GLI. Pretty decent oil analysis numbers when tested.

Shell Rotella T6 is a nice, solid oil. relatively inexpensive also.

Turbo ppl love it due to the shearing factor. Blows M1 out of the water for down here in Florida. Oil consumption went down in my 2.0T when using it.