The changes from four editions of ASTM D6224,such as 98,02,09 and 16 editions,were analyzed.The main differences are that the expression of “to maximize service life of the oil and equipment” in introduction existed in the four editions was deleted in the edition of 16 and the expression of “to ensure a safe,reliable,and costeffective operation of the monitored plant equipment” in introduction was reserved.In addition,some of warning levels of inservice oil test data were modified,new test items and new standard methods were added.Combined with the current technical level and practical experience accumulated of oil monitoring,there are some enlightenment for inservice oil monitoring for China.The firstly,it is necessary to develop standard methods for the measurement of a particular parameter of oil monitoring,and different methods are allowed for single parameter.The secondly,according to the special needs of engineering,analytical methods can be divided into field and laboratory for better guiding the practice.The thirdly,the monitoring satndard of single parameter may be integrated into the standard practice for equipment.The fourthly,the new and effective methods suitable for oil monitoring should be explored.