Engine oil Castrol or Shell

I've used T6 in my MK4 BEW for 5 years now. Regular changes, no issues at all, and at 1/3, the cost of 'suggested' brand.

Personally I rock she’ll rotella 15w40 in the summer and 5w40 in the winter to aid in cold starting. Seems to work pretty good

I use the castrol gtx high mile full synthetic 10w-40 and a sohn adapter with ideimitsu. I’m sure non of the name brands will hurt As long as you change it frequently.

I change every 10,000 km - 7000 mi.

Castrol or Mobil full synthetic.

To me that is much better than running any brand of oil longer.

I’m a Castrol 0W40 guy myself.

It doesn't seem like I burn any oil in my Rabbit. 0w-20 seems too light to me, also, I'm running Castrol Edge 10w-40.

I run Castrol GTX 10w40 in my FD. Premix TCW2 2stroke oil .5oz/gal.

Engine seems happy as can be.

I use mobil1 or castrol full synth 0W-20 for prius engines below 200k and 0W-30 for those above it. More than 30k mi now so far so good. I like the castrol better bec my engines sounds much quieter vs m1.

I use castrol magnatec beucase it has some kindof ionization tech where it sticks to metal surfaces to reduce start up wear which the prius is constanly starting/stopping.

I personally used to run mobil 1 0w-40. as you said its super thin and seemed to just barely get the job done. Recently switched to castrol SLX 5w-30 and I am decently pleased with the first two changes.