What are the causes of excessive oil consumption?
1 Answers
Excessive oil consumption can be caused by worn piston rings, weakened piston ring tension, or overfilling of the oil pan. Worn piston rings: Once piston rings wear out, the side clearance and opening gap increase, reducing sealing performance and causing oil to rise and burn. The solution is to replace the piston rings and inspect the wear on the pistons and cylinder liners. If the pistons and cylinder liners are also worn, they should be replaced or repaired as well. Weakened piston ring tension: Excessive carbon buildup can cause piston rings to stick in the ring grooves or block the oil return holes of the oil rings, leading to oil rising and burning. The solution is to clean the carbon deposits or replace the piston rings. Overfilling the oil pan: If the oil pan is overfilled, it can reduce engine power. Additionally, excessive oil can cause the lubricating oil in the air filter to exceed the marked level, leading to oil being sucked into the cylinders and burned. This can also cause large amounts of oil to enter the combustion chamber and burn, resulting in blue smoke from the exhaust. Unburned oil and fuel that enter the combustion chamber can form carbon deposits on the cylinders, pistons, piston ring grooves, and combustion chambers under oxidation and high temperatures, causing engine "pre-ignition." The solution is to drain the excess oil and maintain the oil level within the normal range, preferably slightly below the dipstick mark.
