过期的润滑油不仅污染环境，而且对设备造成损害，甚至对人体产生危害，所以说判断润滑油是否过期是一件非常重要的事，今天润滑油厂家为大家介绍一下方法。

　　Lubricating oil expired not only pollute the environment, but also cause damage to the equipment, and even harm the human body, so that the judge whether the expired lubricating oil is a very important thing today, lubricating oil manufacturers to introduce methods.

3d走势图带连线图 　　1、JIAOWEIJIANBIANYOUXIAODEFANGSHISHIJIEZHUYULVZHIHUODIANZIYIQILAIPANDUANRUNHUAYOUSHIFOUSHIXIAO。

　　1. The simpler and more effective way is to judge whether the lubricant is invalid by means of filter paper or electronic instrument.

3d走势图带连线图 　　2、BIXUCAIYONGDONGLISHEBEI，JIANGSHIXIAODERUNHUAYOU，YOUQISHIBEIQINGXIJIQINGXIXIALAIDEFEIYOUCHEDIPAICHUFADONGJI。MUQIANSHICHANGZHONGZHUYAOYOULIANGZHONGRUNHUAXITONGQINGXISHEBEI，YIZHONGSHIJINGTAIQINGXI，YIZHONGSHIDAISUQINGXI。HOUZHEDEXIAOGUOYAOYUANYUANHAOYUQIANZHE。

　　2, the use of power equipment, the failure of the lubricating oil, especially the cleaning agent down the waste oil thoroughly discharged from the engine. At present, there are two kinds of lubricating system cleaning equipment in the market, one is static cleaning, the other is idle cleaning. The latter effect is much better than that of the former.

3d走势图带连线图 　　3、ZAIHUANRUNHUAYOUQIANYAOCAIYONGYOUXIAODEQINGJINGFENSANJIJINXINGQINGXI。ZAIFADONGJIDAISUQINGKUANGXIA，JIANGWEIYUYOULUGUANBIJIYOUDIQIAODEYOUNI、HUOSAIQUNBUDEQIMODENGFENSANXUANFU，YIBIANHUANYOUSHI，JIEZHUYULIUDONGDEFEIYOUDAICHUFADONGJI。

　　3, before changing the lubricant, we must use effective cleaning agent for cleaning. When the engine is idle, the oil sludge in the oil pipe wall and the oil pan, and the paint film of the piston skirt are dispersed so that the engine can be taken out with the flowing waste oil for oil change.