Engine oil Castrol or OEM Honda

I've been using the original castrol 10-60 oil and then more recently the BMW M TwinPower 10-60 oil for the last 10 years on my e46 M3.

I was running Castrol 0w30 European formula in my 07 323i and the car ticked a lot and made noises I’ve never heard it make previously when running 5w30. So recently I swapped to castrol 5w40 European formula and the car is whisper quite even on cold starts. It just sounds so much healthier.

I've been putting in Castrol Full Sythnetic 5W30 in my 2.8VR6 for 13 years and I've been told the engine is in great condition (264,000 km).

I run Castrol 5w40 in all my VWs. 2.0, 1,8T, and my mk7 2.0T all have used it and I've been happy with it.

Personally I buy exactly the factory oil, from a manafacturer that factory put in, in German cars it's Castrol, French are Total and Elf, Italians use Petronas Selenia.

My r53 loves Castrol 5w40 and Mann/Mahle filters.

Castrol Edge, I have used it forever in both my vehicles and I 10/10 reccomend it.

I used Castrol magnatec 5w30 Fully synthetic every 6-7k Miles.

I used Castrol edge 5w40 euro car when I had my car.

I've tried most of them. I went like 2 years doing all sorts of testing on my car and never noticed a difference. I stick with good old Castrol Edge like the factory recommends.