1998 Oldsmobile Aurora Owner's Manual - Page 259

If you get gasoline on yourself then and something ignitesit, you could be badly burned. Gasoline can spray out on you if you open the fuel fillercap too quickly. This spray can happen if your tank is nearly full,and is more likely in hot weather. Openthe fuel fillercap slowly and wait for any "hiss" noiseto stop. Then unscrew the capall the way. Be careful not to spill gasoline. Clean gasoline from painted surfaces assoon as possible. See "Cleaning the Outside of Your Vehicle"in the Index. When you put the cap back on, turn it to the right (clockwise) until you hear a clicking sound. Make sure you fully install the cap. The diagnostic system can determine if the fuel cap been left off or has improperly installed. This would allow fuel to evaporate intothe atmosphere. See "Malfunction Indicator Lamp" in the Index. To remove the cap, turn it slowly tothe left (counterclockwise). The cap a spring in it; if has you let goof the cap too soon, it spring back will to the right. While refueling, hang the tethered cap from the hook on the fueldoor. 6-7