一、问题的提出机油供应比例,即机油与主燃油耗量的重量百分比,是机油消耗定额的表达形式。五十年代起,我国就采用这种表达形式。1965年以前,机油消耗定额是按主燃油耗量5%计算。实际上是有指标不限量满足供应。随着制造、使用技术水平的提高和机油质量的改善,拖拉机发动机换油周期随之延长,机油供应比例1966年起降为3%。 First, the issue raised The proportion of oil supply, that oil and the main fuel consumption percentage by weight, is the expression of oil consumption quotas. Since the 1950s, our country has adopted this form of expression. Before 1965, the quota of oil consumption was calculated according to the main fuel consumption of 5%. In fact there are indicators to meet the supply. With the manufacturing, use of technology to improve and improve the quality of oil, tractor engine oil change period is extended, the proportion of oil supply dropped to 3% in 1966.