My BMW 740 keeps burning engine oil, what should I do

Causes of BMW 740 oil burning and how to prevent it.

The engine oil itself has a certain amount of consumption, and excessive consumption is the problem of burning engine oil. There are many factors that affect the burning of engine oil, such as: fuel quality, driving conditions, driving habits, maintenance habits, etc., the following reasons will aggravate the oil consumption and cause the burning of engine oil, so that the vehicle appears:

1. Carbon deposition occurs in the combustion chamber, which makes the gas ring of the piston ring stuck, and the sealing is poor.

2. Oil sludge is generated in the lubrication system, and the oil sludge blocks the oil return hole of the oil ring and weakens the oil scraping performance.

3. Wear occurs between the piston and the cylinder wall.

4. The valve seal is corroded and aging, and the sealing performance fails.

In addition, cars now have crankcase ventilation systems (exhaust valves), which can also exacerbate oil consumption if there is a problem.

Burning engine oil means that the engine oil enters the combustion chamber of the engine and participates in the combustion along with the mixture. The phenomenon of "burning engine oil" in the vehicle will damage the vehicle's oxygen sensor too quickly, resulting in an increase in carbon deposition in the combustion chamber, unstable idling, weak acceleration, increased fuel consumption, and excessive exhaust emissions.

Precautionary measures for burning engine oil:

1. Use high-quality engine oil

Engine oil is very easy to corrode and age in a long-term high temperature state, resulting in the oil film becoming thinner, and it is easier to escape to the combustion chamber to participate in combustion, so the use of high-quality engine oil can greatly delay this phenomenon.

2. Pay attention to the cleanliness of the fuel circuit

Fuel in the combustion process is indispensable to produce carbon deposits, and carbon deposits are the root cause of some car failures, such as the aging of valve seals, piston wall clearance, etc., all have a direct or indirect relationship with the formation of carbon deposits, considering the relationship between domestic oil products, it is necessary to use high-quality engine oil and (PNF) fuel additives to achieve, which is also the key to achieve no dismantling and repair to solve the problem of burning engine oil.

Buy a bottle and put it in the car, and add some when it is burned.

Hello, how many kilometers has your car run, is it fully synthetic engine oil?

An 8-cylinder naturally aspirated engine? Repair it, boring the cylinder, replacing the piston ring, valve seal, crankcase ventilation valve, and you can also use it again.

There is no particularly good way to do this, only overhaul the engine, check the piston rings and valve seals, run so much, it is estimated that these things may be worn more seriously, or the valve oil seals have a relatively aging phenomenon, if a maintenance cycle causes the oil light to be on, or directly overhaul the engine, right?

Possible causes of burning engine oil:

Worn valves and ducts, damaged oil seals;

The cylinder, piston and piston ring wear exceed the limit;

Air booster leakage.

Sending it to the factory for inspection and maintenance can be solved.

Go to the repair shop and check to see if there is a gap.

The industry standard for oil consumption is not greater than liters of 1000 km. If your car has traveled 8,000 km, as long as the oil is not greater than liters, it is not a problem.

Burning engine oil is a common problem, and the concentration of BMW engine oil is still relatively hopeful, 4S stores have a standard, as long as it does not exceed it, the trunk is prepared with a barrel, and a little is added in half a month. Ha ha.

If you burn the engine oil badly, you have to repair the engine. If you burn engine oil slightly, that's a common problem for BMW.

Hello! If the oil burns severely! It may be that the valve oil seal is aging! Or the piston ring is worn, and you should go to the repair shop for inspection.

Summary. Hello friends, the old BMW 740 has the phenomenon of burning engine oil, but the ** does not burn engine oil. First, the BMW 740, which itself belongs to the high-end series of luxury brand models.

Second, the BMW 740 has an atmospheric exterior design, fashionable, and the overall streamlining is particularly good, and it belongs to the high-end business series models. Third, the performance of the engine, chassis and gearbox of the BMW 740 is very stable, and the handling and comfort are particularly high.

BMW 740 does not burn engine oil.

What to do if 740 burns engine oil.

Hello friends, the old BMW 740 has the phenomenon of burning engine oil, but the ** does not burn engine oil. First, the BMW 740, which itself belongs to the high-end series of luxury brand models. Second, the BMW 740 has an atmospheric exterior design, fashionable, and the overall streamlining is particularly good, and it belongs to the high-end business series models.

Third, the performance of the engine, chassis and gearbox of the BMW 740 is very stable, and the handling and comfort are particularly high.

If you want to burn the engine oil, check the wastegas valve first, then the piston rings and valve seals inside the engine.