Engine oil Mannol or ELF

I use Mannol 7715 on my 3.0tdi

I use the mannol 5w30, it might be cheap but it's still just as slippy

5w40 for sure, my engine sounds happier, quieter, more sound than it did when the PO had 5w30 in it. So 5w40 is a given especially since you have a lot of Km on the clock, when it comes to the brand it really doesn't matter especially if you keep the oil change intervals reasonable.

I use Elf Oil and I change mine every 5-7k miles.

Genuinely speaking, it's actually not bad oil at all. Apparently manufactured in Germany, meets or exceeds the OEM spec for my cars. In my 350Z which likes to drink oil, I change it using Fuchs Titan Race Pro S 5W-40 but I keep a bottle of this (also 5W-40) in the boot for top ups.

I run Mannol 5w30 for Japanese brands on my 202k km d16

Works fine but I might change to a slightly thicker one

I currently use ELF Exellium NF, Motul is good too I was tempted to get it....you can also check out ECS Tuning, they sell Lubro Molly now, I think that's gonna be my next choice and I might stick with it. I've used Amsoil for about 20K miles and liked it too. Otherwise, you can't go wrong with Castrol Syntec 5w40 either, I've used it since new all the way till 60K miles.

I used ELF Excellium NF 5W40.

I personnally use Elf and love it, best oil I ever used so far.

Now, I realized that the engine oil the mechanic put on when I got the camshaft replaced in november, is actually meant for cars. The oil is the ELF sporti TXI 10W40.