oil getting by the rings causes white smoke and oil dripping out of the tailpipe.
water
You are burning oil.
You have a blown head gasket.
The most common is the head gasket. BUTDepending on the engine there can be several other causes.
It usually means too much fuel or not enough spark.
If you mean the smoke it's usually related to the quality of petrol
Headgaskets or Stripped Head Bolts
Excess fuel causes black smoke.
Mrs. Stewart's Bluing was created in 1883.
old junky exhaust systems have a lot of debris that catchs fire with high exhaust temperatures
bad rings or really bad valve seals.