Engine stuttering at higher rpm

[LeonGrchz]

White smoke in RCZ is burnt oil, or steam when running the car up to temperature. But they do not have a distinct smell.

If the exhaust smells bad, this can be due to faulty catalytic converter.

Could be just burnt oil, since i did an oil change and topped it up.

And maybe some residues since i put fuel additives in my fuel to clean the injectors.

Will have an eye on the coolant level and hope its not the head gasket.

Thanks for the quick replies!