Engine oil Castrol or FUCHS

I use 5w40 Castro’s European blend in my 06 e60 530xi and it seems like it does the job.

I used Castrol Edge 5w40 last oil change and the engine feels smooth and burns little to no oil.

I used Castrol GTX 10W-40 High mileage and never had issues.

Pennzoil Ultra Platinum or Castrol Edge are probably the best all round oils.

I put 5w40 in mine, that's what is recommended for mk6 at all temps. Summer or winter months. I use Castrol Edge Full Synthetic high mileage, works a charm.

The 0-20 Castrol VW Spec oil I buy from my dealer is cheaper than any 0-20 from Walmart or auto parts stores. My 2019 GSW has 16,000 miles and uses next to no oil between changes. I have averaged over 40 mpg for the 16K miles.

When it comes to oil I have one thing to say. Use Valvoline or Castrol 3000 for conventional 5 to 7000 for synthetic,. If you do this and take good care of your vehicle your car will go 200,000 to 300,000 miles.

I happen to use Castrol in all my gasoline powered vehicles and have had no oil related issues. Given that VW promoted Castrol and, more importantly, that I prefer Castrol in general, I’m staying with Castrol when I can... I've had no oil loss in the Tig with Castrol and see no reason to switch to a different brand just because some MBAhole behind a desk made a profit driven decision to switch suppliers.

I use 15w40 GTX Diesel Castrol oil, it works.

I've posted my UOAs on TDIClub and BITOG. The factory fill was additive depleted at 5400 miles. The Fuchs 507.00 in the next fill was good for 7-7500 miles. It might have gone longer, but I changed it out in advance of a long trip. Bottom line is that preliminary evidence is that the 507 oils are inadequate for extended OCIs in the 3.0L motor.