White smoke

Hello,

This sounds to me like you might have blown a head gasket. If you had three extra liters of oil in your vehicle's engine the excessive oil pressure probably blow out your head gasket at an oil galley, taking enough of it to allow coolant to enter a cylinder. I have included some links down below.

https://www.2carpros.com/articles/coolantantifreeze-in-the-engine-oil
https://www.2carpros.com/articles/how-to-test-engine-compression
https://www.2carpros.com/articles/excessive-smoke-coming-from-the-exhaust-pipe

Please go through them and get back to us with what you find out.

Thanks,
Alex
2CarPros