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METHYL-TERTIÄR-BUTYLETHER (MTBE)

Unleaded fuel containing an oxygenate known as Methyl Tertiary Butyl Ether (MTBE) can be used. The ratio of MTBE to conventional fuel must not exceed 15%. MTBE is an ether-based compound derived from petroleum. MTBE has been specified by several refiners as the substance to enhance the octane rating of fuel.