Tag Archives: Particle Counting

Understanding ISO Codes

Understanding ISO CodesThough particle counting is reported as an actual count of the number of particles (of a given size, per ml of fluid), most specifications and limits simply refer to ISO codes. The ISO codes, according to the ISO 4406:1999 standard, relate to only three different ranges of particles, ≥4 µm/≥6 µm/≥14 µm.It should…
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Causes of High Nitration

Causes of High Nitration Excessive aeration can lead to compression combustion of air molecules (microdieseling) causing thermal breakdown of oil molecules, which will increase the nitration value. In engine applications, early combustion caused by advanced timing will produce nitration by-products. These by-products form a slimy brown or reddish-brown residue. For specific information on other measured…
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Causes of High Oxidation

Causes of High Oxidation While some new oils may produce an oxidation value due to the presence of synthetic esters, increases in oxidation generally represent degradation of the fluid. The biggest driver to oxidation is heat, as the rate of reaction doubles with every 10 °C or 18 °F increase in temperature. This type of…
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