With oil prices moderating – crude is down slightly in the $93 a barrel range Wednesday – if those fuel surcharges decrease it could be a test for FedEx’s U.S. business.
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。
3
Done the bench test with the proper proportion emulsified diesel oil as automotive fuel.