So I have a 2012 WRX that I have owned for just over a year, about 7000+/- miles. A few months ago I start to see smoke coming out of my exhaust(both tips). The car just did not seemed balance, to much vibration in the engine, so I figured it was low compression in the #4 cyl, probably a ringland. Took it to the dealer and it was low compress in the #4 cyl, but was not a ringland. It was a cracked piston and a piece actually come off when the service tech took it out. They did not replace the block, just the piston, ringland, gaskets etc.. all covered by my warranty.
Well just the other day I took off from a stop sign(not launching, but was probably about 2 1/2) an a big cloud of smoke out of the back. Now everytime I start it from a cold start I get a puff of bluish smoke for a few seconds then stops. Anyone have an idea's on cause or experience with this, thx.