Thicker oil in a 330i (2017)?? consequences?

[Jimmy1]

Hi, I just bought a 2017 330i from a buddy of mine and he hands me the keys and says "just keep putting in extra thick oil in it and yer good!" ..I said , "why does it have a leak?!!! I just paid you for the car dude, why didn't you tell me this before?"

He laughed and said, "nahhh, it will run better, get more protection and last longer". I shrugged and drove off to my house.

So now I am thinking, should I stick with the same "thicker" oil my friend was using, or go to my favorite brand which I used for years in my other cars:

https://www.searchforparts.com/oil-c...b46b20o0-turbo

Will I have any consequences, such as did the engine get used to the thicker oil and now I am going to put the above synthetic oil that is recommended for my BMW?

scratching my head here, I could not find answers to this online so I posted here. Not sure what to do.

Thanks!

[pshovest]

Which thicker oil is seller recommending?

[jclausen]

Should of had it checked out first, have the leaks diagnoised if it has any

[White94RX]

Put what BMW recommends in the engine. 0w-20

[pepsi335]

You sure hes your friend? Use the recommended and keep an eye for any leaks.

Sent from my SM-G965U using Tapatalk

[CJKaz]

Does he know more about lubrication, than the PhD engineers and tribologists, that designed the engine and specified the oil grades & viscosities?

[letank]

well, to give anyone more infos -I know, I am not too active in this section, but the oil viscosity applies to any engine-

https://www.ferrarichat.com/forum/th...e-this.136052/