[pro_turbo]

Originally Posted by Dzmitry

While it is your daily, I would certainly recommend sticking to spec, which would be 0w-20 or 5w-30.

The oil you are running is extremely thick and probably doing more damage than good on a daily car as it is still too thick at normal operating temperatures. Once you go forced induction, you can start looking into running thicker oils. From there, it will simply depend on your oil pressure, which I would recommend getting a gauge for.

Now if you consider tracking or doing any intense drive when under forced induction, you may also want to consider an oil cooler, but that will be your choice to make. As oil temperatures begin to rise higher than usual (above 230F about), at the minimum you should change your oil to a higher oil weight like 5w-30/40, etc. But at no point should you really ever need 15w-50. It's just not designed for this engine, and if you truly need it to upkeep with temperatures, then you probably should be getting an oil cooler instead.

EDIT: One thing I'd like to add is, get back to us on how things are once you move back down to a low weight oil. I am curious if this problem continues now that you have already ran such a high oil weight for some time, but hopefully not of course. Worst case scenario, is you'll have to keep an eye on your oil and topping it off all the time to not create further problems.

I will change it as soon as possible.
And back to your guys