Why do cars burn oil?

my car is burning oil,why?Why do cars burn oil?
Usually this is caused by the piston rings allowing oil to get past them and into the combustion chamber, but can also be caused by oil that has been thinned with gasoline and many other things, but Usually, it is the piston rings that causes the burning of motor oilWhy do cars burn oil?
Because you either have worn valve seals, these seal the oil from leaking down into the cylinders, or worn piston rings and oil gets by the rings and you burn the oil. You can change the valve seals, but re-ringing the engine will be a pain in the neck, well taking off the heads and putting in new valve seals will be as well.....
Actually, cars are suppose to burn gasoline. You're probably putting the oil for your oil change into the gas tank.


Assuming you've already drained the old oil out the bottom of the oil pan, you're running your car with no lubrication in it. This is bad for the wear and tear of your car's engine, and expect the pistons to weld themselves to the sides of the cylinder walls soon.


On a more serious note: There are several possibilities.


1) The piston rings are worn out,


2) The valve guides are worn,


3) The valve seals need replacing,


4) The PCV valve is clogged and needs replacing,


5) The cylinders are no longer round,


6) Your car has a carburator that is improperly set up and causing raw gas to get past the rings and diluting the oil viscosity,


7) Using too low a viscosity for your make of car,


8) You're driving a Stanley Steamer, and using oil to generate steam (sorry, couldn't resist).





Your question leaves a lot of information out of the mix. Things like how many miles are on the engine, the made and model, is there blue smoke out the exhaust pipe, and if so, is it all the time, or only on start-up?
Car burn oil because it has oil leak internally to the inside of the combustion chamber. It could be a gasket or any kind of seals.
Usually bad rings or valve seals