Alright thanks,
do you also know what the difference is between a 5w30 and 5w40 oil, why isn't 5w30 obselete as 5w40 covers a wider range? I think im not gonna cheap out on the engine oil anymore i do have like 2 cans of 0w20 mannol left.
Wouild it hurt the engine if I go like 15k and 12...