There is some smoke, blue type, when I press the clutch or give it som throttle after long downhills (the one to two minutes type), foot off the pedal. Seems worse when the engine is cold. Also when the engine is not completely warm, when in neutral and I rev the engine, then let it rev down, and then rev it again, some blue smoke appears.

The engine is not using much oil. After three track days the oil had just sunk from the highest mark to the lowest of the MAX marks.

The compression ratio is the same on all sylinders and seems high enough, about 150 PSI on a cold engine. The plugs are not far from perfect in appearance. Is it leaking oil through the oil control rings, the stem seals or the turbo?