1.2 Castrol oil put into 308 at service

As of today, I have my vehicle serviced periodically. Peugeot 308 1.2 puretech engine is factory out of date. I know that 0 30 oil is put in these vehicles. When I conveyed this issue to the spare part, I wanted to ask how true it is.

It doesn't matter much.

So if 0w30 oil is recommended, 5w30 oil is not used. Because the space of the parts in the engine is adjusted according to the oil of that thinness. If you use a thicker oil, thick oil does not get between these parts or it will take longer to enter, so the wear is greater.

Although it does not cause much harm in the short term, you will see it in the long run.

If I am not mistaken, the oil capacity of your vehicle is 3.5 liters at 0.5 oil filter. Check whether the oil is more than the dipstick. The pressure inside the engine increases, which damages the seal, gasket, etc. and again in the long run, it causes oil leakage from the seals and gaskets