Today I was merging onto the highway, gave it some gas to catch up to traffic. I looked in rear view mirror just in time to see the puff of smoke I left behind me, I am assuming it came form the exhaust. I had just completed several short trips in town, and right before then I noticed my boost gauge bouncing more than it usually does and the supercharger whine fluttered in time with the gauge.

What might have caused that?

What color of smoke, Blue: Your burnig oil, White, Black.

Black. It promptly went away, I've been looking a lot now.