How to Solve the Oil Burning Issue in BMW 5 Series?
2 Answers
You can place a white cloth under the engine and start the engine to check for oil leaks based on the oil stains on the cloth. Check if the piston rings are stuck due to carbon deposits in the cylinders. Since the probability of oil burning due to damaged valve stem seals is quite high in BMWs, they can be replaced without removing the cylinder. Check if the cylinder walls and pistons are severely worn and if the clearance is too large.
When I drove my BMW 5 Series, I encountered an oil burning issue, and I always felt a lack of power with blue smoke from the exhaust. After checking, it turned out to be worn piston rings causing oil to enter the combustion chamber. The solution was straightforward: first, check the oil dipstick to monitor consumption. If it burns more than half a liter per 1,000 kilometers on average, it's time to take it seriously. I went to a trusted repair shop, performed a compression test to confirm the fault, and spent some money replacing the piston rings and valve stem seals. Now, two years later, oil consumption has returned to normal. For maintenance, I use high-quality synthetic oil and regularly check the oil level and air filter to prevent recurrence. Remember, ignoring the issue could lead to more severe engine damage, which isn't worth the risk.
