Engine oil Castrol or Shell

In my e39 M54B30 473k km I am dumping Castrol Magnatec 5w-40.

Nothing to complain.

I use castrol 5w-40 Euro on my 2006 Revup. Good oil pressure on hot SoCal days and burns less oil.

The same oil goes into all GDI engines at my dealer, which is Shell Helix Ultra SP 0W-20. This is a super expensive, latest spec oil. Oil changes with this oil are done at 9320 miles if turbocharged and 18 640 miles if naturally aspirated.

I have an MX-5 with that engine, Mazda uses Castrol Edge 0w20 but you can use a heavier oil and sime say it reduces wear. The purpose of the 20 weight is fuel economy.

I live in Turkey vw service uses Castrol EDGE 5W-30 LL

I have a buddy that used the Shell Rotella diesel oil that is dirt cheap for his 2009 r1.

So, the cause for VANOS to work as shit was an oil. I put Motul and engine drunk it like it was a water. After oil change to Castrol magnatec, engine works like a charm.

10w-30 FS castrol edge is what I use and I'll add Lucas oil full stabilizer to it and she loves it:')

It’s fine. I stick to the Castrol Euro as it’s readily available.

And one thing I would definitely do is get the Castrol out of there if you intend to keep the car long-term. The recent changes to the oil we are delivered at the dealer is crazy!!! It's not the same as it used to be and I can tell a huge difference in my cars. Have had excess oil consumption, lower MPG and quicker deterioration of the oil over last 6 months using Castrol(and I work at dealer)