1993 Cadillac Fleetwood Owner's Manual - Page 267

r and you don't have to buy a higher octane fuel to get of pinging. It's rid the heavy, constant knock that meansyou have a problem. What aboutgasoline with blending materialsthat contain oxygen, such as MTBE oralcohol? MTBE is "methyl tertiary-butyl ether.'' Fuel that is no more than15% MTBE is fine foryour vehicle. Ethanol is ethyl or grain alcohol. Properly-blended fuelthat is no more than 10% ethanol is fine for your vehicle. Methanol is methyl or wood alcohol. J r - Gasolines for Cleaner&r Your use of gasoline with detergent additives will help prevent deposits from forming in your engine and fuel system. That helps keep your engine in tune and your emission control system workingproperly. It's good for your vehicle, and you'll be doing your part for cleaner air. Many gasolines are now blended with materials called oxygenates. General Motors recommends that you use gasolines with these blending materials, such as MTBE and ethanol. By doing so, you can help clean the air, especially in those partsof the country that have high carbon monoxide levels. In addition, some gasoline suppliers are now producing reformulated gasolines. These gasolines are specially designed to reduce vehicle emissions. General Motorsrecommends that you use reformulated gasoline. By doing so, you can help clean the air, especially in those parts of the country that have high ozone levels. . c- - 253