All About Oil Filters

Oil Filters

The filters that are designed to remove different contaminants from transmission oil, engine oil, or hydraulic oils are often called Oil Filters. There are several different types of oil filters available for different machinery. Among all the different oil filters compared, the basic concept essentially remains the same. According to the experts at, some of the different functions carried out by an oil filter include:
· Lubricating the internal parts of the engine.
· Absorb the different contaminants.
· Cool down the engine by transferring the generated heat.
· Seal off the piston ring and cylinder bore interface.
· Suspend any soot that is formed by the combustion process.

Plenty of research has been done over the years on oil filters to create the perfect system. Most oil filters resemble a metal can filled with several filters that are designed to capture different organic and inorganic contaminants that are present in the oil. Organic contaminants include materials like oxidized petroleum and bacteria, whereas inorganic contaminants include dust or small amounts of metals that have come apart as a result of the wear and tear in the engines.

The material used for filtering in the oil filter has undergone plenty of changes over the years. The earlier designs made use of material like steel wool, metal screens, wire meshes and so on. Then the industry switched to disposable filters like cellulose and paper. Then the synthetic filters came along, which made use of manmade fibers. Currently, the low end oil filters stick to cellulose media and the higher end filters make use of extremely fine metal mesh. The prices also vary according to the filter media present inside the oil filters.

The primary filters are a part of all modern engines these days. They are also referred to as ‘full-flow engines’ since every drop of the engine oils passes through this particular oil filter. In case there is any obstruction in the oil filter, the oil will not be able to flow into the engine freely. In case such a block occurs, the bypass valve opens up automatically depending to enable oil to reach the engine. The bypass valve enables the oil to skip passing through the oil filter and reach the engine directly. In order to prevent situations like this, the full-flow filter lets small contaminants pass through to avoid creating a block by using fine mesh filters.

Secondary filters are not very different from primary filters beyond the fact that they are able to filter smaller contaminants as well. This is usually done by using conventional filter media like cellulose. Since the oil flow becomes restricted, only a small part of the oil flow is allowed t pass through the secondary filter.

The number of filters that are added to an engine depends on the size of the engine as well as on the duration of time that the oil will be present in the crankcase. Most full-flow oil filters are cleaned out during the normal servicing routine of the vehicle or machinery. Since regular checkups are often recommended and even supposed to be carried out under certain laws, the oil is changed on time, reducing oil blockage occurrences. If the vehicle is used I a cleaner environment where not much dust or other contaminants are present, the service interval can be a bit longer. Another way to extend your servicing interval is by using secondary filters that can filter out the contaminants that are allowed to pass through the primary filters.

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