Question about 2000 Toyota Corolla
Andy, there are a number of reasons your car is burning or using oil. If the car hasn't been maintained properly it would cause wear on the piston rings.
A lot of the lower grade oils contain wax and that can gradually stop up the drainage ports from the heads to the oil pan. With the oil staying on top of the hot heads, it can vaporize and be sucked out of the valve cover by the PVC and be burnt in the piston.
If the engine has gotten very hot, it is not unusual for the aluminum head(s) to warp thus allowing seepage of oil and or water from the head. The leak could be externally which you should see on your driveway or it could be an internal leak going into the piston chamber.
To eliminate some of the possibilities a compression test should be done first so your mechanic can have a more definitive answer.
Posted on Nov 08, 2014
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Posted on Jan 02, 2017
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