Reasons for Diesel Engine Burning Engine Oil
3 Answers
Diesel engine burning engine oil is mainly caused by the following reasons: 1. This is due to the piston rings, especially the oil ring, being worn, misaligned, having poor elasticity, broken, or stuck in the ring groove by carbon deposits, which greatly reduces the oil-scraping effect of the piston rings. As a result, the oil on the cylinder wall enters the combustion chamber at the top of the piston, causing the engine oil to burn. 2. Continuous operation of the diesel engine under high temperature and high load conditions can cause wear between the piston rings and the cylinder liner, leading to cylinder scoring and subsequent burning of engine oil. To avoid the phenomenon of diesel engine burning engine oil, drivers should: (1) Choose the appropriate engine oil: Select engine oil with high viscosity and low volatility, and try to choose high-quality engine oil from well-known brands. (2) Follow the break-in requirements for new cars: Owners should drive carefully during the break-in period and adhere to the break-in requirements. (3) Ensure fuel quality is up to standard: The quality of fuel is a major factor leading to carbon deposits, so it must be guaranteed. (4) Perform regular maintenance, change the engine oil and oil filter on time, and replace the air filter promptly.
Having driven diesel engine vehicles for over 20 years, I've encountered numerous oil burning issues. The main causes are piston ring wear or aging valve stem seals - these components tend to leak oil into the combustion chamber after prolonged operation in high-temperature environments, leading to excessive oil consumption and blue exhaust smoke. Turbocharger seals are another common pain point; once loosened or damaged, oil leaks in and gets burned. Cylinder wall wear or scratches can also contribute, and oil pressure imbalance exacerbates these problems. My advice: regularly check oil levels, use high-quality diesel-specific oil changed every 5,000 km - don't skimp on this small expense as repairs cost far more. Avoid prolonged high-speed heavy-load driving to reduce engine strain and extend lifespan.
My diesel truck started burning oil after running 100,000 kilometers, probably due to worn piston rings. The reason might be that I often drive short distances in the city, stopping before the engine fully warms up. Over time, the cylinder seals become loose, allowing oil to slip into the combustion chamber. A clogged crankcase ventilation system is also a common factor, causing abnormal oil pressure and drawing oil into the intake manifold to be burned together. I've tried using thicker, high-quality oil, which can delay the issue somewhat, but the fundamental solution is to fix the oil leak points. If the valve stem seals are aged or improperly installed, oil consumption can skyrocket. Regular maintenance and replacing seals are essential—don't wait until major problems arise like I did.
