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J I TECHNO-ECONOMIC EVALUATION OF WASTE LUBE OIL RE-REFINING IN SAUDI ARABIA Mohammad Farhat Ali, Abdullah J. Hamdan and Faizur Rahman DEPARTMENT OF CHEMISTRY Kine Fahd Universitv of Petroleum & Minerals " Dhahran: Saudi Arabia Keywords: Waste Lube Oil. Re-refining, Economics INTRODUCTION Abut 80 million gallons of automotive lubricating oils are sold in Saudi Arabia. Much of this oil, after use, is actually contributing to the increased pollution of land because of indiscriminate dumping. Any scheme of secondary use of the waste lube oils would be of interest both for conservation of energy resources and for protection of environment. This paper discusses the secondary use for the used automotive lubricating oils. Process technology