How to choose an oil filter

The car’s oil system is one of the most important for the correct operation of the engine. Effective lubrication of the rubbing surfaces and heat removal from the cylinder walls – these are its main tasks. In the process, oil is contaminated with food. fuel combustion and oxidizes, it is prone to condensation and dust and small debris. All these impurities it is necessary to separate at the stage of oil supply to the cylinders, for which an oil filter is used. This is a special element that separates dust, debris and impurities and passing the purified oil further down system. In order to significantly extend the life of the engine, the choice of an oil filter and its timely replacement is necessary pay special attention.

How to choose an oil filter


We recommend reading an article from an expert on the choice of air filter and the secrets of choosing a cabin filter.

Top Oil Filter Manufacturers

Production of filtering equipment at the moment carries out many companies, but the choice should be given to the benefit of exclusively verified products supplied to conveyor of many world manufacturers:

  1. Purflux;

  2. Knecht;

  3. Mahle;

  4. Filtron;

  5. Mann;

The opportunity to study reviews should not be overlooked. users relating to a particular product. You can find them in the Internet, on the pages of forums and communities in social networks.

The principle of operation and types of oil filters

The design of the oil filter is quite simple and functional. It is an element made of soft and dense cellulose with increased hygroscopicity in relation to oil. The corrugated structure is designed to hold contaminants and preventing them from entering the engine block. As operating car deposits accumulate a significant amount, and because after 7-10 thousand kilometers the filter requires replacements.

Filter insert


A soft element of a cylindrical shape, devoid of an outer shell. Installed in a special seat – an oil cup – and is rigidly fixed by the top cover. Made from cellulose in pure form or in combination with synthetic fibers.


  • Inexpensive

  • A variety of models and sizes;

  • Qualitatively filter the oil;


  • They require partial disassembly of the engine compartment of the car;

  • Assume frequent replacement;

External oil filter

External oil filter

It is installed on the outside of the engine and represents a metal container in which the filter element. Replacement is carried out without much difficulty and need dismantling the valve cover or other elements. Intended for Installations in structurally compatible vehicles.


  • Compact size;

  • Do not require special tools and disassembly of the engine;

  • Ease of installation;

  • Protection against mechanical stress;


  • More expensive filter inserts;

  • The resource does not exceed 10-15 thousand kilometers;

The main criteria for choosing an oil filter

oil filter selection criteria

First of all, you need to remember that on the quality of the filter elements are not worth saving. It depends on them the functionality and performance of the car, and therefore should give preference to either branded genuine parts manufacturer, or products of suppliers on conveyor, the list of which is listed above. In addition, pay Attention is required to the following features:

Filter principle

  1. Full-flow filters allow the passage of the entire volume of oil before serving to rubbing parts. The cleaning in this case is close to maximum, but there is also a significant drawback. At violation of replacement intervals and operation in harsh conditions the engine may experience oil starvation, which could lead to exit him out of order;

  2. Partial-flow filter occupies a certain part of the volume oil cup and does not filter the entire volume of incoming oil. The degree of purification in this case is lower, however, oil starvation and the problems associated with it are excluded as a class.

The quality of the cellulose filter element

This parameter can only be controlled in insert models. The paper should not be too thick to prevent oil starvation, however, and soft models are not a panacea – such filters quickly become unusable and require replacement.

The principle of operation of the check valve

The non-return valve is installed either in the filter itself, if it is It’s about closed, non-separable models, or in an oil glass. It is intended to hold the volume of oil in the filter. when the engine is turned off, which greatly facilitates the cold car launch. The valve membrane should have a small range stroke and quality manufacturing.

Ultimate degree of filtration

The parameter reflecting the amount of impurities that are capable of hold the filter while performing your duties. It is measured in percentage terms and the higher this parameter is – the better for the engine. Preference should be given to those models filtering which is at around 90-95%

Minimum fraction frequency

Indicates the physical size of the particles that it can stop. filter. An extremely important parameter for car operation, since any size particles carry abrasive impact on the walls of the cylinders, which is fraught with the formation of scoring and engine failure as a result. It’s better to choose the filter the minimum size of the filtered fraction is at around 1-2 microns.

Replacement interval

Depending on the specific model and manufacturing technology, this parameter can vary and range from 5-7 to 20-30 thousand kilometers of run. It’s not worth bringing the mileage to the upper limit, since after 15 thousand kilometers the filter stops performing the duties assigned to him. Optimum mileage on one the filter is 7-10 thousand kilometers.


In the next article, we tell you how to choose the best engine oil. You will learn about the best manufacturers, important the nuances of choice, as well as get tips on the operation of the oil.

Attention! This material is subjective opinion of the authors of the project and is not a buying guide.

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