Ibrahim Taleb H, Al-Zubaidy Essam A H
Department of Chemical Engineering, American University of Sharjah, P.O. Box 26666, United Arab Emirates.
J Environ Manage. 2007 Oct;85(1):171-8. doi: 10.1016/j.jenvman.2006.09.002. Epub 2006 Oct 24.
The service life of lubricating oil produced in the United Arab Emirates (UAE) was examined using a car fueled with leaded or unleaded gasoline of the same grade in harsh local conditions. In addition, the economic impact of using leaded vs. unleaded gasoline via the effects on the useful life of engine oil was investigated. Every 500 km that the car was operated, the physical properties of the oil were examined to determine the optimum oil life before replacement. It was found that relative to unleaded gasoline, leaded gasoline resulted in a faster deterioration of lube oil properties and a reduced useful life of the oil. Many of the effects of use on the physical properties of oil became apparent from the beginning of its service, especially when leaded gasoline was used. Our findings indicate that the recommended useful life of oil when using leaded gasoline is 2500 km. With unleaded gasoline, deterioration of the physical properties of the lubricating oil became a concern after 3000 km. Thus with unleaded gasoline, it is recommended to have an oil change every 3500 km. These findings indicate that the decision of the UAE government to stop using lead compound additives to improve the octane number of gasoline will not only protect the environment from the harmful effects of lead compounds, but will also extend the useful life of oil. This extension will reduce the amount of used oil that is disposed of by up to 4678 tons/year. This reduction in oil use translates to a cost savings of about 23.4 million UAE Dirhams (=$6.37 million US Dollars) per year.
在阿联酋当地恶劣条件下，使用加注相同等级含铅或无铅汽油的汽车，对阿联酋生产的润滑油的使用寿命进行了检测。此外，还研究了使用含铅汽油和无铅汽油对机油使用寿命的影响所产生的经济影响。汽车每行驶500公里，就对机油的物理性能进行检测，以确定更换机油前的最佳使用寿命。结果发现，与无铅汽油相比，含铅汽油会导致润滑油性能更快恶化，机油使用寿命缩短。使用过程中对机油物理性能的许多影响从其使用开始就很明显，尤其是使用含铅汽油时。我们的研究结果表明，使用含铅汽油时，机油的推荐使用寿命为2500公里。使用无铅汽油时，润滑油的物理性能在行驶3000公里后开始令人担忧。因此，使用无铅汽油时，建议每3500公里更换一次机油。这些研究结果表明，阿联酋政府决定停止使用铅化合物添加剂来提高汽油辛烷值，不仅将保护环境免受铅化合物的有害影响，还将延长机油的使用寿命。这种延长将使每年处理的废机油量减少多达4678吨。机油使用量的减少意味着每年可节省约2340万阿联酋迪拉姆（637万美元）的成本。
