10w40 - 5w40?

Hello, I am thinking of changing the oil of my car, I am between castrol edge and mobile 3000 super x1 as the oil.After that, the service said that there is no more than 10w40 thin income, but my car is still 41 thousand km, there is no oil burning, deterioration or something. I did not know my brand 10w40 first, but the oil is not contaminated yet.

Meanwhile, my vehicle was installed 8 thousand km with LPG.

you will not have any problems or even better 5w 40

I was the friend of the previous owner and I put 10 40 usually said to me, I asked the service 5 30 or 0 40, I put 5 30 and I did not have any problems 3. I will change the oil for the third time and I will put 5 30 again

Friends I couldn't find the total hydraulic brake oil Dot 4 which brand can I use 2004 2004 petrol

Teacher dot4 is an important criterion but I think it is useful to choose well-known brands.

Use Castrol or Mobile

Castrol edge in engine oil? Mobil super 3000 x1?