[ngoma]

Three main places could be your problem. Rings, valve stem seals, turbo. What kind of rings did you use, who did the sizing, boring, and honing?

Was it burning oil with the old head or did it start with the new one?

You are doing the right things by running synthetic and warming up before pushing it hard. Unless you mean letting it idle before driving it away. This could lead to cold-stacking, meaning the rings get gunked up and are not able to effectively seal well.

How much is it burning?