Why Does Burning Engine Oil Require an Engine Overhaul?

[ChristianFitz]

An engine burning oil requires an overhaul under the following circumstances: 1. Overused spark plugs may cause electrode detachment, leading to piston damage and necessitating an engine overhaul. 2. Using low-grade gasoline for several years can result in carbon buildup due to incomplete combustion, causing engine vibration, increased fuel consumption, or damage to the catalytic converter. 3. Deteriorated engine oil severely affects the lubrication system, leading to premature wear of piston cylinder walls. 4. Insufficient coolant causes rapid temperature rise, and if not addressed, can result in "cylinder scoring," severely damaging the engine. 5. Timing belts must be replaced within 60,000 kilometers, and timing chains around 100,000 kilometers. Failure to replace them promptly may damage valves and camshafts.