Had'nt done any track days while i owned it barely even saw the road haha! Engine had 50k miles onit when i dropped it in.Will be fine. All b18's puff out smoke on track. Its on the overrun then back into throttle it puffs slightly, was a lot worse than that before I got the catch can sorted.
I've done 3 trackdays and 20mins at japfest. Prior to that I have no idea how many track days the engine had done.
Doesn't use a lot it doesn't even read on the dipstick as any missing after a full day.