Daewoo Matiz. The main malfunctions due to which fuel gets into the engine oil

Most breakdowns can be divided into two large groups, the properties and characteristics of which differ from the type of engine used.

Gasoline got into the engine oil

Fuel can end up in the oil, even in engines with a fully functional cylinder-piston group.

This problem is quite serious and can lead to malfunctions, a significant reduction in the life of the motor, as well as complete failure of the power plant.
Gasoline in oil significantly worsens the protective properties of the lubricant and dilutes the lubricant. Without going into details, the more gasoline that gets into the crankcase, the more serious the consequences can be.

With a small amount of fuel in the lubricant, the engine may operate noisier, and the wear of loaded components will increase slightly. To solve the problem, it will be enough to eliminate the problem of gasoline leaking into the crankcase and replace the engine oil.
In other cases, driving on highly diluted fuel oil can cause the engine to require expensive major repairs.
The list of main signs that, to one degree or another, may indicate the occurrence of the problem under consideration includes the following:

The power unit loses its power, and there is a noticeable excess fuel consumption;
the exhaust becomes thick, grayish, and has the smell of unburned gasoline;
malfunctions occur in the operation of the internal combustion engine, the engine begins to stall and stall;
the engine began to run noisily, knocking appeared in the area of ​​the pistons, crankshaft, etc.
the lubricant level in the crankcase is increased, and the smell of gasoline in the engine oil is clearly audible;
the lubricant is diluted, a drop of engine oil easily ignites from an open flame;
If you suspect that a small amount of gasoline has entered the lubricant, you can also further evaluate the properties of the oil using the “oil spot” method. To do this, just drop one drop of oil from the dipstick onto a sheet of clean paper. Then you need to dry the sheet for a couple of hours. Smooth, smooth edges of the spreading drop will indicate that the material has not lost its properties.
A black outline in the center of the spot indicates the presence of effective additives in the lubricant. We also note that this method It is also useful for a general check of the quality and condition of the oil, identifying the presence of water and other impurities in it.

If any of the above signs were noticed (noise during operation, knocking, excessive consumption, lubricant dilution, smell of fuel, a drop on the sheet when checked is different from normal), then you should prepare for the fact that there may be gasoline in the oil.

As already mentioned, the consequences of further driving on such a mixture may be different. The main thing is that gasoline is a rather aggressive product in relation to lubricants, as it contains a large number of chemical additives.

Engine oil also contains a whole package of additives, and these additives are not designed for direct contact with fuel. In other words, an irreversible change occurs in the physical and chemical properties of the motor oil. For this reason, rising oil levels due to gasoline are a serious threat to the engine.

Let us also add that antifreeze can also enter the oil system, resulting in the formation of an emulsion. In this case, the lubricant also loses its properties. If the leaks are intense, then a water hammer may occur when the engine starts.
As for gasoline in the lubricant, a certain danger is posed by the fact that quite often the fuel dilutes the lubricant gradually, that is, it enters in small quantities. This means that the driver does not notice the problem for a long time, continuing to operate the unit as usual. At the same time, engine wear increases greatly. Now let's move on to how gasoline gets into the oil.

How gasoline gets into the oil: troubleshooting

To understand why gasoline is in the engine oil, you need to refer to design features various internal combustion engines.

First of all, on any engine (injector, carburetor), fuel enters the crankcase from the combustion chamber through the piston rings. It is important to understand that if you pour gasoline into the cylinders of a new engine, after some time it will end up in the oil. The reason is simple - the fuel washes away the oil film and passes through the leaks at the locations of the piston rings.
For engines with a carburetor, a common cause of gasoline getting into the oil is damage to the fuel pump diaphragm. Another reason for oil dilution with fuel is problems with the carburetor needle valve in the float chamber, fuel overflow into the carburetor, etc.
Taking into account the above, it becomes clear that the main reason for gasoline getting into the lubricant is problems with the power supply or ignition system, as well as with the internal combustion engine itself. It turns out that problems may arise due to the following:

There is a significant re-enrichment of the working mixture;
there were malfunctions of the fuel injectors, carburetor, mechanical fuel pump;
the ignition system is faulty or does not work correctly;
the engine is faulty or worn out, there is no necessary compression in the cylinders, the fuel does not ignite;
In other words, fuel may be supplied in excess, but the rich mixture will not ignite. Also, gasoline does not burn because there is no spark at the spark plug or the charge does not burn due to low compression in the internal combustion engine. In any case, unburned fuel enters the crankcase.

If the carburetor “poured” gasoline into the float chamber or “poured” the injection nozzles, then the fuel will also flow into the cylinders and then enter the oil. In order to prevent fuel from getting into the oil in one way or another on the injector, you need to check the tightness of the injection nozzles and clean them.
It is also recommended to carry out computer diagnostics engine, evaluate the quality of mixture formation, and separately “ring” the ECM sensors, which can affect the formation of the mixture. On carburetor internal combustion engines, the condition of the fuel pump diaphragms is monitored, and the carburetor is regularly adjusted and diagnosed.

Before a cold start (especially in winter), you need to periodically ensure that no running gasoline appears or accumulates under the carburetor. If such a phenomenon is noticed, then the carburetor should be checked.

At the same time, you need to pay attention to a special drainage tube. If the tube becomes clogged, excess fuel, due to problems with the needle valve, begins to enter the engine crankcase. Now let's take a look at the most common reasons in more detail.

Taking into account the fact that the fuel supply system on different engines can be very different, the ways in which gasoline enters the lubrication system also differ. On engines with fuel injection, gasoline is supplied from the fuel tank under pressure created by an electric fuel pump. At this stage, the oil cannot mix with the fuel.

At the same time, a mechanical fuel pump is installed on carburetor engines. The diaphragm of such a pump forces gasoline into the carburetor installed on the engine. The mechanical pump rod on some cars is driven by an eccentric and is also lubricated with engine oil in the same way as the camshaft.
If the pump diaphragm is damaged, gasoline begins to enter the rod channel, penetrating the lubrication system. When the membrane is not severely damaged, then the accumulation of gasoline in the oil will occur slowly, and the lubrication level will not increase. The problem is indicated by a change in the smell of the oil, as well as some dilution.
In the case when the membrane has large breaks, gasoline stops flowing into the carburetor, the internal combustion engine starts with difficulty, jerks and dips appear when moving, the unit operates unstable, etc. To eliminate the malfunction, you need to replace the fuel pump membrane, as well as the engine oil.

On the injector, most problems are related to the injectors, since an experienced driver can immediately detect malfunctions in the ignition. A more complex situation is when one or more injectors cannot close tightly. This means that after stopping the engine, the fuel, which is in the fuel rail under residual pressure, flows into the manifold, then enters the cylinders, and then flows into the crankcase.
Piston rings to some extent prevent gasoline from falling into the oil, but if they are worn out or stuck, then fuel flows relatively freely into the oil pan. To solve the problem, you need to remove the fuel rail, after which the tightness of each injection nozzle is checked.

To do this, flushing liquid or kerosene is supplied to the injector under pressure, and the opening and closing of the nozzle is initiated from the power source. You can also use a special stand to check and clean the injectors. If the injectors are leaking, then they need to be repaired or replaced.

As for the ignition system, if the mixture does not ignite in one of the cylinders or in several, then part of the fuel flies out into the exhaust system, and the remaining parts simply settle on the cylinder walls, then flow into the engine crankcase.
Malfunctions of the ignition system are diagnosed as usual. First, the spark plugs are checked, then the high-voltage armored wires, coil, distributor and other elements that are installed on a particular vehicle.
CPG wear is a common problem with carburetor and injection internal combustion engines. As a rule, we are talking about wear of compression and oil scraper rings. In such a situation, fuel actively flows into the crankcase. It is important to consider that problems with rings also lead to decreased compression.
It turns out that the mixture compresses worse and burns incompletely, the engine loses power. The driver presses the gas harder, applying combustion chamber more fuel, but complete combustion does not occur. Excess fuel leads to engine contamination and the formation of carbon deposits, and also partially enters the crankcase.

Causes of leakage

Fuel, regardless of the type of internal combustion engine power system, must reach the carburetor and combustion chamber after the gasoline pump. The latter is the area between the cylinder head (cylinder head) and the piston head, where the combustion of a mixture of fuel and oxygen occurs. On the way to the combustion chamber, the mixture of fuel and air passes through the intake channels; their necks are always lubricated with motor oil. This is where leaks happen. The reason is that the valves are equipped with rubber caps. They are designed to reflect vehicle oil. If, due to severe wear of the caps, the lubricant penetrates into the combustion chamber, the car exhaust will begin to smell like motorcycle smoke. The chance that car oil will enter the combustion chamber is quite low. Oil usually smells like gasoline for other reasons. If you start the car in winter conditions, gasoline will burn ineffectively for the first couple of minutes. The exhaust gases smell like raw fuel and condensation is leaking from the exhaust pipe. This is completely normal.

Eventually

If gasoline gets into the oil, then the engine should not be operated until the damage is repaired. This phenomenon is especially dangerous when the driver did not know about the problem, that is, a large amount of gasoline has accumulated in the crankcase, the pressure in the lubrication system has dropped, and the emergency oil pressure light on the dashboard comes on.

In such a situation, you need to immediately correct the underlying problem by repairing the ignition system, carburetor or fuel injection. An oil change will also be a mandatory procedure, which is best not to delay.
Finally, we add that in some cases the fuel itself may be the cause of inefficient combustion of the mixture in the cylinders. The fact is that gasoline is often of very low quality.

Fuel that is mixed with third-party additives burns worse. Unburned residues can also end up in the crankcase. In some cases, it is enough to change the oil and start refueling at another gas station.

Also, in some sources, for preventive purposes, it is recommended to periodically turn the engine to high speeds for a short period of time while traveling along the highway. Such driving leads to higher heating of the oil, which helps reduce the content of accumulated condensate and fuel trapped in the lubricant.

When purchasing a car, a person must understand that his expenses will not end only by purchasing a vehicle. Every year you will have to spend money on preventive maintenance and possible repairs, as well as pay money for fuel. Naturally, some car enthusiasts pay attention to economical cars whose gas mileage is minimal. This allows you to save quite a significant amount of money every year. One of these options is the Daewoo Matiz 0.8 or with a 1.0 liter engine.

Daewoo Matiz is a representative of a compact city car, which began to be produced in 1997. The Korean automaker was able to create a fairly good and affordable model, which immediately became very popular in a number of countries. Suffice it to say that the demand for this car is so great that Daewoo Motors produces this brand in eight more countries on our planet. Today this car is known under slightly different names; the buyer has the opportunity to choose a transmission between automatic and manual, as well as several options for gasoline power units.

When buying such a car, the question immediately arises - what is the real fuel consumption of the Daewoo Matiz?

We determine gasoline consumption standards for Daewoo Matiz

Naturally, there is a so-called official one for each vehicle. Unfortunately, information from the manufacturer does not always correspond to what a real car owner observes. This difference depends on many factors. Here are just a few of them:

1. The quality of the fuel that is filled into the vehicle tank.
2. Unaccounted loads that may affect the car during operation.
3. Climatic conditions and so on.

Fortunately, the official data on fuel consumption of Daewoo Matiz and those observed by the owners of this model do not differ much.

For example, if you compare information from ordinary owners and representatives of the manufacturer’s company, you can see the following result for Daewoo Matiz gasoline engines of 0.8 and 1.0 liters:

1. Official consumption per 100 km:

• Volume 0.8 liters: highway – 5 liters, city – 7.4 liters, mixed – 6.2 liters;
• Volume 1.0 liters: highway – 5.4 liters, city – 7.5 liters, mixed – 6.5 liters.

2. Real consumption, according to reviews from car owners:

• Volume 0.8 liters: highway – 5.5 liters, city – 7.2 liters, mixed – 6.7 liters;
• Volume 1.0 liters: highway – 6.5 liters, city – 7.5 liters, mixed – 5.5 liters.

That is, if you compare these data, you can easily conclude which of the power unit options is better to choose in this or that case, in terms of efficiency. For example, for purely urban use it is better to take a model with the minimum available engine capacity, but if a person plans to use the car in different conditions approximately the same, it is better to stick with a one-liter engine.

Daewoo Matiz 1.0 MT – fuel consumption per 100 km

• City cycle: 7.5 l
• Extra-urban cycle: 5.4 l
• Mixed cycle: 6.5 l

Daewoo Matiz 0.8 MT – fuel consumption per 100 km

• City cycle: 7.3 l
• Extra-urban cycle: 6.3 l
• Combined cycle: 6.9 l

The miniature is exceptionally well suited for use in urban environments. Its small size makes it easier to park and allows you to increase the maneuverability of the car several times. The vast majority argue that Daewoo Matiz is suitable only for the fair half of humanity. However, a lot here depends on the chosen design. Yes, for women such a car is an ideal solution, but men who love practicality and elegance often choose this “A” class car.

For a more comfortable trip, Daewoo Matiz is equipped with air conditioning and power steering, which makes driving as easy as possible. There is a sunroof in the roof of the car, which can be very useful in the summer when it is hot outside. Fog lights and an audio system complement this list of useful options that are included in the basic package of the Daewoo Matiz. And we can’t help but note the presence of alloy wheels, which help improve the quality of the ride.

You can hear many flattering reviews about this vehicle from owners. The only thing worth noting in this context is the fact that the Daewoo Matiz is not suitable for that part of the population that loves high speeds and drive. The car is equipped with a fairly modest engine, 1.0 or 0.8 liters. However, this is quite enough to use Daewoo Matiz exclusively as a vehicle with which you can get to work in the morning and return from it in the evening. As a matter of fact, this baby was created for this purpose. This is exactly how its designers position such a car.

Fuel consumption in different time different years. When driving in winter, you will spend about ten liters per 100 km. But in summer it will take a little more than 7 liters to cover such a distance.

Real reviews from owners about fuel consumption on Daewoo Matiz:

Car with 0.8 liter engine and manual transmission

• I visit my relatives living in Grodno regularly. Fuel consumption on the highway is 4.5 liters with an engine volume of 0.8. Very satisfied. “Matiz” is the leader in my hit parade. I constantly think about the city, because here fuel levels can reach 10 liters.

• I always get to work in the morning. It's no secret that at 6 o'clock it's time for traffic jams. I noticed the fuel consumption in the city - it is 6.5 liters. In general, the Matiz 0.8 has low fuel consumption.

• As a rule, fuel consumption increases significantly during acceleration. I plan to buy a Matiz, since my friend already has this model, and I liked it precisely because of its efficiency when driving on the open highway.

• I will repeat once again - fuel consumption on the highway and in the city almost always decreases as the vehicle runs in. This happened with my Matiz: gasoline consumption was initially 9 liters per 100 km, but gradually decreased to 7 liters.

• The car was purchased at the end of winter, when the country experienced minimum air temperatures. I ran the car in sub-zero temperatures, which is why, I think, my Daewoo Matiz consumed 9.2 liters per 100 km. I'm waiting for spring to check the data. From my own experience, I will report on the influence of weather on gasoline consumption, as well as driving habits on the highway. Many owners of Matiz with a volume of 0.8 say that in the warm season after running-in, gasoline consumption drops to 7 liters. Who even knows what indicator is considered the norm for a Daewoo Matiz?

0.8 liter engine with automatic transmission

• At first, hoping for reasonable consumption figures around the city, I drove the car quite dynamically (constantly alternating the gas and brake pedals). This driving style played a cruel joke on me - fuel consumption was almost 10.2 liters per hundred km. mileage I thought it was worth experimenting a bit.

• Trips with measured acceleration and braking now consume only 8 liters. Obviously, fuel consumption depends very much on your driving style. I decided to save even more on fuel consumption, so I turned to my friends for advice. They recommended refueling exclusively with fifth grade gasoline (95). And what do you think? Gasoline consumption was again in the tens. After brainstorming and all sorts of experiments, I was able to determine that the reason for such fuel consumption is trivial - I was specifically deceived at the gas station. After changing the gas station, fuel consumption again approached the 8.5 mark. BUT! It's time to undergo a mandatory technical inspection. I informed him about the unsatisfactory behavior of the car. The technician tightened the valves, after which the fuel consumption again amounted to ten. He asked me to return everything to its original position. As they say, fuel consumption in the city is again eight and five.

Daewoo Matiz Best 1.0 with maximum equipment. Fuel consumption for liter engines

• If you drive to the country, fuel consumption is 10 liters per 100 km. I live in Moscow, which means my fuel consumption is close to 13.5 liters when driving around the city with traffic jams. Moscow roads simply do not allow a small engine to save fuel. Due to constant traffic jams and endless traffic lights, travel occurs at a reduced speed. At the start I always squeeze the throttle to full, which leads to an increase in fuel consumption to 14 liters per 100 km. The maximum speed that I have experienced in a Matiz is 170 km/h. Gasoline consumption clearly does not meet metropolitan standards. I even tried a measured and leisurely ride. My attempts to save money were not crowned with success, because fuel consumption in the city decreased by only one liter and what is the point in such savings?

Daewoo Matiz was first shown to the public back in 2000; the car was created for emerging markets, but Russia was not included in this list. The first batch of Matiz appeared with us only in 2010. This car won the hearts of Russians with its price and build quality. The car easily runs 100 thousand km without serious breakdowns. The manufacturer presents 2 engines and 2 gearboxes.

Daewoo Matiz 0.8l.

Fuel consumption rate per 100 km

This engine is the most common, it is chosen by 80% of buyers. The unit works with both an automatic transmission and a manual transmission. Maximum speed - 144 km per hour with a power of 51 hp. The fuel consumption of the engine is quite high for such an engine size. In the urban cycle, 7 liters are consumed, on the highway - no more than 6 liters.

Real consumption

• Gennady, Saratov. I bought it because I was tired of the breakdowns of my old 7, the car is excellent, it’s inexpensive, it’s enough for my wife and I. Of course, for such a car the consumption is high, in the city it’s 8 liters, no less.
• Anastasia, Moscow. My husband bought it at my request; the fuel consumption is very high. As for me, the consumption is good, in the city it comes out to about 7-8 liters, no more.
• Dmitry, Kaluga. I bought it for my wife, a 2011 model. The car is terrible, there is no sound insulation, the engine dynamics are like on a moped, the car does not accelerate more than 100. Gasoline consumption is simply enormous for such a car.
• Pavel, Kaliningrad. My wife drives, and sometimes I do too, while mine is stationary. Model 2008, the car is small, but there is a lot of space in the cabin, fuel consumption on the highway is only 6 liters, but in the city a little more.
• Natalya, Stavropol. I've been driving for 2 years now, the car just hasn't seen any problems. I don’t know the fuel consumption, but I think it’s low, since I don’t fill up often.

Daewoo Matiz 1.0l.

Official information

This version of the engine appeared 2 years after the release of the first car on the market in Russia. The engine is installed on top versions of the car. The engine runs on both AI92 and AI95, fuel consumption according to the manufacturer in the urban cycle does not exceed 7 liters, and on the highway it stays around 6. This engine, unlike the 0.8l version, has 8 valves and 4 cylinders, so the consumption is almost same. The unit works only with a mechanical transmission.

Owner reviews

• Stanislav, Mytishchi. I've been driving for a couple of years now, the car is small (2003 model), maybe not respectable, but I like it. Consumption in the city is not bad, 7-8 liters, although it’s a bit much for such a car.
• Georgy, Ivanovo. I bought it for my daughter, she rides it and she likes it. Fuel consumption is low, I fill it up once every 2 months, and it drives every day.
• Peter, Moscow. We bought it for our family with a 1.0L engine, we drive it with my wife. The consumption seems to be small, but I didn’t measure it. We fill up infrequently, a couple of times a month.
• Nikita, Sevastopol. My father gave it to my sister with a 1.0L engine, I drive it when the car is free, I really like the car, it’s small on the outside, but it’s very spacious inside, and the consumption is low.
• Daria, Perm. I bought it to replace the seven, which was successfully sold. The car, compared to the Russian auto industry, is simply superb, it will fit anywhere. Consumption is no more than 8 liters, which allows you to save.

This car is on Russian market not very long ago, so there is no point in talking about comparing engines, especially since they have not changed even once since the start of production. The manufacturer reports that the car will be modernized in the next 2 years. Gas engine will be replaced by diesel, and old engines will be modernized.