Lubricating oil management method and lubricating oil life prediction method

摘要

The lubricating oil management method of the present invention is a method of managing lubricating oil by determining the degree of deterioration of lubricating oil containing an antioxidant, and uses the following determination method a and the following determination method b. It is a characteristic method. Determination method a: Using a Fourier transform infrared spectrophotometer, the infrared absorption spectrum of the lubricating oil is measured, the content of the antioxidant and the altered substance having an antioxidant function is calculated, and the lubricating oil is calculated from the content. A method for determining the degree of deterioration. Judgment method b: After filtering the lubricating oil with a filter, measure the color difference of the captured object with a color difference meter, or measure the color difference of the lubricating oil with a color difference meter, and determine the degree of deterioration of the lubricating oil and the degree of contamination of foreign substances from the color difference. how to.