Piston rings or Rich oil .
Doesn't matter what type of vehicle, this indicates an exhaust leak and an oil leak. The burnt oil and the exhaust, get pulled into the cowl which is where the air for the interior comes from! Not very healthy...
Seriously worn piston rings and more than likely a broken oil ring.
Unburned fuel in the exhaust system causes the backfire from the exhaust pipe.
A vehicle that emits blue exhaust is experiencing an oil leak that has seeped past the engine seals and started to burn with the fuel. It indicates either a blown head gasket or an engine oil leak.
What can cause black sooty exhaust is bad valve guides. When the guides are bad oil leaks into the cylinder when the car isn't running. When the car starts it produces black exhaust.
Usually a blown gasket, usually the head gasket. It creates a seal between the oil and the combustion chamber. When broken oil can leak in and you will have smokey exhaust and a dramatic drop in oil level, or exhaust gas (which includes H2O vapor) can mix with the oil. This is a very serious problem and can lead to severe engine damage.
Oil always worked for me!!! ....You might have blown your headgasket! This means that your engine coolant is leaking into the oil in the engine and it causes smoke out your exhaust.
can exhaust manifold leak cause you to burn oil