if its blue oil its burning oil--possible turbo failure
The OP has mentioned white smoke (water?) and now possible blue smoke (turbo failure, or could it be worn piston rings? That may only apply to petrols?)
Should I be worried if my car produces the odd amount of black smoke. It's a soot chucker
remapped and pushing somewhere in the region of 180-190 bhp. Little bit of smoke only when pushing hard, higher revs.
Sorry to the OP for going off topic, slightly.