Engine oil Castrol or Shell

As someone who lives in Florida, and has a high mileage m54 motor, I only use Castrol 5w40 and 5w30 if I cant find the first option. Runs amazing and daily driven with some abuse lol

Go to wallmart and buy two jugs of Castrol Edge Full Synthetic 5W-30 and then just purchase a couple filters off of FCP Euro.

Shell helix has been fine for me

The 2020 has been great but the engine still clacked and groan albeit nowhere near the 19. With the 0.5 quart of Castrol 5W50 I love the car now! Pickup is great and the engine being pettier seems to help the transmission shift better also.

As long as you’re not mixing fuel with it you’ll be fine. All of my stuff runs on basic and cheap T4 Rotella 15w-40. Have never had a single issue

I use edge 5w40, I switched from 5w30 and oil consumption has went way down and it feels like the engine runs smoother.

Castrol 5W-40 Euro been using it since 20k miles now at 160k mile zero issues other then gasket leaks.

I use Castrol Edge High Millage and a STP XL filter or Mobil 1.

Rotella T6 full synthetic, zero problems, never let me down.

I've used a number of different oils in my XS400 over the past couple years, can't say I've noticed much of a difference other than when I used a 15W40 the engine was a lot noisier, going back to 20W50 and the engine quieted down a lot.