Is Oil Burning a Common Issue with the VV7?

[McLila]

It is not a common issue. The VV7's oil burning can be attributed to the following reasons: Fuel Quality: Due to fuel quality not meeting international standards, a large amount of carbon deposits can easily form in the combustion chamber during engine operation. Carbon deposits are the root cause of various engine problems. Carbon Deposits: Carbon deposits accumulate in the piston grooves, causing the piston rings to stick together. This prevents the piston rings from sealing properly, significantly reducing the oil sealing capability. Additionally, sludge can clog the oil return holes, preventing the oil from flowing back normally, leading to increased oil consumption. Carbon deposits also exacerbate wear between the piston and cylinder walls, creating excessive gaps and allowing oil to enter the combustion chamber. Seal Corrosion and Aging: The valve stem seals can corrode and age, resulting in poor sealing. Valve stem seals are among the most prone to aging in the engine, and most cars with over 100,000 kilometers driven experience this issue.