Why Does the Old Highlander Burn Engine Oil?

[Teri]

Old Highlander models may burn engine oil due to gaps in the seal between the engine piston rings and cylinder walls. During vehicle operation, the rapid movement of the piston rings can carry lubricating oil from the cylinder walls into the combustion chamber, resulting in oil burning. Below are the specific causes and solutions: Main causes of engine oil burning: Valve stem seals; Excessive piston clearance; Driving habits; Excessive engine oil level. "Burning oil" refers to engine oil entering the combustion chamber and participating in combustion along with the air-fuel mixture. This phenomenon can lead to rapid damage of the oxygen sensor, increased carbon deposits in the combustion chamber, unstable idling, weak acceleration, increased fuel consumption, and excessive exhaust emissions. Solutions for engine oil burning: Replace the valve stem seals promptly to ensure proper sealing. Replace the piston rings directly. Regularly clean carbon deposits on the piston rings as a preventive measure. During daily driving, pay attention to driving habits and avoid overly aggressive driving.