It's burning oil. Usually worn rings, oil sludge or carbon in the ring grooves or worn valve guides. The above answer is correct. However, excessive white smoke would indicate large amounts of water vapor in the exhaust possibly caused by a blown head gasket or cracked block. Check your oil to see if there is water in it. If there is, it will look milky on the dipstick. Another possibility My car had this same problem;and it was caused by a small black valve to the top of the engine that was cracked. Which caused the engine to suck air in. The air when mixed with heated oil you get "poof" white smoke.
oil getting by the rings causes white smoke and oil dripping out of the tailpipe.
water
You are burning oil.
Vehicle likely overheated, or for some other reason, the head gasket has been breached, allowing coolant to be burned in the engine. The coolant is consumed, appearing as whitish smoke emitting from the tailpipe.
the engine is burning oil. blue smoke oil white smoke antifreeze black smoke excess fuel
Blown h20 seal in engine or turbo !!
The most common is the head gasket. BUTDepending on the engine there can be several other causes.
If you mean the smoke it's usually related to the quality of petrol
Headgaskets or Stripped Head Bolts
Excess fuel causes black smoke.
If it is really smoke, then it is almost always caused by burning of oil that enters the engine due to bad seals and rings.
No, the engine exhaust is what comes out of the tailpipe.