1994 GMC Suburban Owner's Manual - Page 251

Gasolines for Cleaner Air lour use of gasoline with deposit control additives help prevent will deposits from forming your engine and fuel system. That helpskeep your in engine in tune your emission controlsystem working properly. It's good and for your vehicle, and you'll bedoing your part for cleaner air. Many gasolines arenow blended with oxygenates. GeneralMotors recommends that you use gasolineswith these blending materials, such as MTBE and ethanol. By doing so, you can helpclean the air, especially in those partsof the country that have carbon monoxide levels. high In addition,some gasoline suppliers are now producing reformulated gasolines. These gasolines are specially designed to reducevehicle emissions. General Motors recommends that you use reformulated gasoline. By doing so, you can help clean the especially in those partsof the air, country that have high ozone levels. You should ask your service station operators their gasolines contain if deposit control additives oxygenates, and if they have been and reformulated to reduce vehicle emissions. Diesel Fuel Requirements and Fuel System Some statesand provinces have restrictions on the purchase of diesel fuel for light-dutyvehicles and requireyou to buy permits or pay special taxes. Some of these restrictionsapply only to residents,and others apply to both residents and visitors. These restrictions can change.learn the current To restrictions in any state or province, contact your auto club, the police or other officials. Fuel Requirements NOTICE: Diesel fuelor fuel additives not recommended in this manual could damage your fuel systemand engine. Yourwarranty wouldn't coverthis damage. And: Diesel fuel that has been mixed with engine oil could damage your engine and emission controls. Always check with your service station operator to make sure his diesel fuel not has been mixed with engine oil. If you ever run out of diesel fuel,it can be difficultto restart your engine. "Running Out of Fuel," later inthis section, tells you howto get it started again. To avoid all this, try never to let your tank get empty. 6-5