What is the solution for BMW 5 Series burning engine oil?
3 Answers
Pay attention to regular oil changes. Regular oil changes can not only ensure oil quality but also ensure the engine performs at its best. You can also follow the oil change mileage recommended in the user manual or specified for the vehicle model. More extended information is as follows: 1. Pay attention to frequent oil level checks: When using engine oil, it is essential to regularly check the quality and quantity of the oil in use. This is because the crankcase must have sufficient oil to ensure the engine's normal lubrication state. If the oil level is too low, it can cause parts to burn out and accelerate oil deterioration. If the oil level is too high, it can seep into the combustion chamber through the gap between the cylinder and piston, increasing carbon deposits in the combustion chamber. Therefore, the oil level in the crankcase should be checked frequently, and oil should be added promptly if it is insufficient. 2. Pay attention to regular oil changes: Note that different types of engine oil cannot be mixed. Special gasoline engine oil cannot replace diesel engine oil, mainly to avoid accelerating diesel engine wear. Since gasoline engine oil and diesel engine oil differ in usage, they can only be substituted if the manufacturer provides a substitution note or labels the oil as suitable for both gasoline and diesel engines, or if it is within the specified grade range.
My BMW 5 Series has been running for five years, and the oil burning issue is indeed a headache. Experience tells me to first check the valve stem seals—when these age, they can leak oil into the combustion chamber. Replacing them can solve most of the problem. Carbon buildup on the piston rings is also a concern; regular cleaning with specialized detergents can prevent sticking and reduce oil consumption. A faulty PCV valve can suck oil into the intake system, and replacing it only costs a few hundred bucks. I check the dipstick weekly and top up with 0W-40 full synthetic oil when needed—its higher viscosity slows consumption. If all else fails, a major overhaul is the last resort. Regular maintenance saves a lot of money, as an engine rebuild can cost tens of thousands.
Here's my approach to handling oil burning in the 5 Series: Don't rush into major repairs, start with simpler solutions. Valve stem seals are a common issue - when the rubber deforms under high temperatures it causes leaks. Replacing them with high-temperature resistant improved versions costs just over 2,000 yuan. For piston ring carbon buildup, I regularly use cleaning solutions, which can be done during routine maintenance. Switching to 5W-40 oil made a noticeable improvement, and when paired with oil additives, it helps clean the fuel system and reduce deposits. The turbocharger often has problems too - if its oil seal leaks, it needs replacement. Every two months I also use a borescope to check for carbon buildup in the cylinders and address it promptly. This car requires diligent care to avoid expensive repairs down the road.
