Lubricating oil to drain intervals, we replaced, the replacement is completed after the arrival of waiting for the next oil change intervals and then replaced. It is each of our owners are the way to go. However, in the conventional way, you ever wondered why oil will oxidative deterioration, the oil change to an oil change must be why?

  With the above questions, we take a look at the following speaking knowledge of it. After deep oxidation of the lubricant inside the chemical composition of oxygen increased, the molecular weight increases, the non-hydrocarbon compounds from the hydrocarbon compound transformed into; on the outside now darkening, increased precipitation, corrosion increases, the performance lubricants decline. That is why we regularly changing oil sake.

 The use of lubricants in the final products of oxidation, such as oxidized engine oil in two directions: one direction is to produce acidic substances (such as carboxylic acids, hydroxy acids, asphaltenes acid, etc.) and the intermediate ester, the final product is carbon green quality; the other way is to generate resin and asphaltene, the final product is a semi-coke quality oil. Hydroxy acid, semi-lactide, asphaltenes acid, these components slightly soluble in lubricating oil precipitated fraction as a viscous substance, easily attached to the metal surface, the film will be converted into high temperature asphalt, semi-coke quality oil, charcoal blue nature, places dark brown or black powder-like fine particles suspended in the oil, can precipitate from the oil when aggregated into large particles. 

 Oxidation of lubricants in addition to its own chemical composition related, but also with the conditions of use are closely related, such as high and low temperature, air pressure or oxygen partial pressure of the size of the catalytic metal in contact with the strength and the like. Among them, a very important factor is the catalytic metal. Practice has proved that many metals have a catalytic oxidation of lubricants commonly used metals, copper for catalytic biggest lubricants, especially when there are more obvious presence of moisture. The main reason is to promote the catalytic metal peroxide decomposition, produces free radicals, thereby accelerating the oxidation reaction.