best oil for x16sz?

Hello, Can someone tell me what I can give the x16sz engine (1,6L) for oil without it breaking? I would like to use 5W40 again, but my motor doc said that this would be too thin and 10w40 is best suited for it. But I still think the 10w40 is too thick when it’s cold. The 5W40 is already pretty thin. Since I like to use the engine extremely hard and I like to load the engine even in cold conditions, I would like to use an oil which is the V Is there anything better for this engine or is 10W40 the best? Actually, I find full-syntetic oils much better. Use partial-syntethic or oils that only consist of mineral components also really very reluctantly…