A lot of drivers wonder why their car burns more oil than normal, especially when their car is getting older. If you are one of the drivers that want to know the major reasons why your car is burning more oil? Then, you need to read this article to the end.
Your vehicle will consume more engine oil as it gets older. Burning oil is among the popular problems that a lot of drivers ignore, even though it can cause a lot of damage to the car’s engine.
Common culprits that result in burning oil are worn valve stems, guides and seals, and piston rings, which will allow the engine oil to seep into combustion chambers. If oil gets in the combustion chamber it will burn immediately in amounts small enough not to produce telltale blue smoke in the exhaust, enough to notice when you check the car’s dipstick.
Potential Causes For Burning Oil
It is very important to know the causes of burning engine oil so that you will be able to avoid it and will automatically stop your engine oil from excess burning.
Whenever oil seeps into the combustion chamber, then it is due to one or more worn parts. The latest car engines that use low-viscosity oil, like 5W-20, are small amounts of wear that can lead to oil entering this chamber.
These are some of the causes of excessive oil consumption:
1. Worn Out PCV Valve
Positive crankcase ventilation (PCV) system is among the engine components that eliminate harmful gasses that are generated when the engine is combustion.
It does this by routing excess gasses to the combustion chamber so that they can be burned for the second time before exiting with the exhaust.
But, when the PCV system is clogged, it may cause an oil blowback. Instead of removing the combustion gasses, oil gets sucked into the engine through the air intake. To solve this problem you need to resolve the issue simply by replacing the PCV valve.
2. Worn Out Piston Rings Or Cylinder Walls
Each set of piston rings forms a seal on the cylinder walls so that it will be able to maintain engine compression and prevent combustion gasses from escaping. But, if your piston rings have worn out or the cylinder wall has deteriorated, then the seal will no longer function effectively. So with faulty seals, the oil will enter the combustion chamber, burn, and leave you with less oil than you started with.
3. Worn Out Valve Seal
Worn out valve is also one of the causes of burning engine oil because valve stem seals are designed to regulate oil consumption and valve lubrication, so when it is broken it will begin to do the opposite. A valve seal that has been damaged will leak oil into the engine cylinders and get into the combustion chamber.
4. “Normal” Oil Burning in One Vehicle May Be Excessive in Another
While oil burning is a popular common problem, manufacturers don’t guide on this issue, so what is normal for one engine is excessive for another. For example, BMW explains to owners that it is okay for some engines to burn quality oil in less than a thousand miles. In a tip sheet to fleet-vehicle operators, GM says average consumption “can be in the range of one quart within 2,000 miles on a properly driven and maintained vehicle.” Other manufacturers don’t discuss consumption — and if you ask what’s “normal,” the answer you get may depend on whom you talk to.
As a rule, a lot of engines with less than 50,000 miles won’t be able to make use of more than a quart of oil between oil changes. If your engine requires a quart every, say, 3,000 miles or less, that is a sign of a leak that may not be easily visible.
Immediately after, an engine gets beyond perhaps 75,000 miles, and past 100,000, increased oil consumption should be expected.
A lot of the newer engines use thinner, lower-viscosity oil, like 5W20 or 0W20 instead of, say, 10W30 due to the oils thinner, it’s very to easy for them to slip past gaskets, seals and rings so it aa worn even slightly over time, thus increasing oil consumption.
What to Do When You Have a Car Burning Oil
If smoke coming from your tailpipe has a blue tint, this shows a surefire sign that your car is burning oil. When your car begins to leak oil into the combustion chamber, it causes several problems that need to be addressed immediately so that it causes additional problems. Sometimes you may not notice smoke coming from your exhaust, you should know that there’s something wrong with your car if it is if your car is consuming too much oil between oil changes. You need a simple tuneup may be all that is needed to solve the problem, more in-depth repairs may also be required.
When it comes to excess oil consumption, the most effective method is to regularly check your oil level and get a professional mechanic that will look for leaks in your engine and locate where you’re burning through oil. Oil consumption over a few years for a particular engine will provide a basis that will let you know when consumption becomes excessive and possibly alert you that a leak or internal problem has developed.
Lawsuits Due to Cars Excessively Burning Oil
A lot of drivers have their ideas when it comes to how much is normal and has sued several manufacturers in recent years according to the claims of oil consumption, such as Audi, BMW, Honda, Subaru, and Toyota. Widespread complaints from owners have pushed a lot of manufacturers to extend warranties or replace engine parts, and lodge a complaint with a dealer or car company to get any repairs.
Honda, for example, extended the engine warranty on the available 2008-11 Accords and 2010-11 CR-Vs with four-cylinder engines to eight years/125,000 miles due to owner’s demand and experienced excessive oil consumption of up to one quart for a thousand miles. Owners who want their vehicles will be able to use a quart every 3,000 miles.