Taking 10w/ 30 SD/ CC all-purpose engine oil as an example, an analysis and study was made by using infrared technique on the oxidation pattern of all-purpose engine oil in gasoline automobiles and diesel vehicles. 以10W/30SD/CC通用内燃机油为例,利用红外光谱测定技术对通用内燃机油在汽、柴油车使用过程中的氧化规律进行分析、研究。