What are the causes of engine oil burning in cars?
1 Answers
The reasons leading to engine oil burning in cars are as follows: 1. Poor fuel quality: The primary cause of engine oil burning is poor fuel quality. When fuel cannot be fully combusted, it forms a large amount of carbon deposits. Over time, these deposits accumulate and thicken, with some entering the piston, causing piston ring adhesion and clogging the oil return holes. This creates gaps in the engine, allowing air to enter the combustion chamber and participate in the combustion process, resulting in the phenomenon of oil burning. 2. Traffic congestion leading to incomplete fuel combustion: Due to traffic congestion, fuel cannot be effectively combusted, generating a significant amount of carbon deposits. These deposits clog the oil return holes, preventing the oil scraper ring from removing oil from the cylinder walls. As a result, the oil remains in the combustion chamber and burns, causing oil burning. 3. Aging of valve stem seals: Aging valve stem seals can also lead to oil burning. Valve stem seals are made of heat-resistant and oil-resistant rubber. These seals are exposed to high temperatures, gasoline, and engine oil, along with temperature fluctuations from cold and hot operations, which deplete the plasticizers in the seals. Over time, the seals begin to shrink, allowing oil to enter the combustion chamber and burn, thus causing oil burning. 4. Substandard engine oil quality: Substandard engine oil quality is another cause of oil burning. If the oil quality is substandard, its lubricating effect weakens. Combined with the accumulation of carbon deposits, the oil loses its lubricating properties, making it easier to cause wear on the cylinder walls. This wear increases the engine temperature, quickly leading to cylinder scoring and engine failure.
