In the OELCHECK laboratory reports, the oxidation value is usually indicated under the heading of “Oil condition“. But why is it not mentioned in some reports? And what is the significance of this value anyway?
The oxidation value has been the most important indicator for the ageing of an oil for many years. However, for some lubricants with base oils containing ester and/or additives dissolved in esters, it is barely relevant any more. The following products are particularly affected by this:
Biodegradable ester-based hydraulic oils
Synthetic gear oils with a polyalphaolefin (PAO ester) basis which are often used in the transmissions of wind turbines, for example
Engine oils with a relatively high FAME (biodiesel) content
Engine oils with vegetable oil content
Engine oils with an elevated soot content
Gas engine oils with a high ester content, such as those used in the operation of engines with biogas, sewage gas or landfill gas. For the gas engine oils designed in this way, we stopped providing the oxidation value for individual engine manufacturers some time ago.