What oil can ruin the engine? How to deal with maslozora? ..

1. Why do modern engines use more oil?

Increased oil consumption is facilitated by an increased compression ratio and an increase in effective pressure in the cylinders. This facilitates the passage of gases through the piston rings into the crankcase and from there through the ventilation to the combustion chamber.

The presence of a turbocharger also has an influence: even with a new turbocharger, a certain amount of oil enters the compressor section and with it the cylinders.

Another purely modern reason for the maslozhora is a long ride at high speed.

2. Is 0W-20 oil dangerous for the engine?

Most modern engines have a compact design with narrow oil passages specifically designed for low viscosity 0W-20 oils. They slightly reduce fuel consumption. But for engines with relatively large holes – from structurally old to heavily worn – such oils are harmful.

Oil pumps will not create the necessary pressure, the required oil wedge between the rubbing parts will not be created, and a lack of oil will quickly finish the engine.

It can be conditionally assumed that low viscosity oils should not be used in engines below the third ecoclass.

3. Is it necessary to change the oil with its high consumption?

In the factory instructions, manufacturers, in order to absolve themselves from claims, call a fairly high oil consumption acceptable. Normally 1 liter per 1500 km and under difficult circumstances even one liter per thousand. These are very large numbers. Still, a well-maintained engine that is not used in racing conditions should consume oil in such a way as to avoid topping up from replacement to replacement. That is, about a liter per 10-15 thousand kilometers.

Even if the oil consumption is high, it must be replaced.

Firstly, when changing the oil, we also replace the oil filter. In addition, the engine will be able to run at least part of the time on clean oil with good cleaning properties. It may be that the oil consumption decreases.

It often happens that the first time after the replacement, the oil almost does not burn out, and then begins to consume intensively. This suggests that it has lost its properties and needs to be replaced. Waste is a result of the operating conditions no longer matching the quality of the oil. The case can be both in a hard driving mode, and in low quality or the wrong selection of oil.

4. Does it make sense to use magnets to clean engine oil?

Oil purification from particles of ferrous alloys is used in any car – magnets are placed in all types of gearboxes, including variators. But this method is rarely used in engines, because the oil changes much more often than in a tank, and a full-flow filter gets in the way of dirt.

A suitable place to collect the wear products of cast iron and steel is the engine crankcase. The oil goes from there to the pump and only then to the filter. If you install a magnetic plug in the oil drain hole to reduce pump wear, you will notice that a hedgehog of iron particles has formed on the magnet when replaced. So the way works! When removing the pallet during repairs, it makes sense to install a powerful neodymium magnet from the inside and secure it tightly.

You can also mold magnets to the steel filter housing. The method makes it possible to prevent the ingress of particles into the oil line at the moment of opening the bypass valve, which occurs the first moment after starting the engine with cold, thickened oil. The method is not meaningless – we recommend it especially to caring motorists.