Fuel economy performance and some the latest specifications of inter-combustion engine oil at home and abroad are recounted. Test method of fuel economy performance is introduced.
重点叙述了国内外内燃机油燃料经济性能及油品规格的要求，介绍了评价燃料经济性的试验方法。
Automotive engine reliability which is related to the main technical performance "when failure" problem, which is crucial to the car engine specifications.
而其中汽车发动机的可靠性是关系到主要技术性能“何时失效”的问题，这是汽车发动机至关重要的技术指标。
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