1998 Oldsmobile 88 Owner's Manual - Page 236

While refueling, hangthe tethered cap from the hook on the fuel door. I CA JTION: If you get gasoline on yourself then and something ignites you could be badly burned. it, Gasoline can spray out on youif you open the fuel filler too quickly. This cap spray can happen and if your tank is nearly full, is more likelyin hot weather. Open the fuel filler cap slowly and wait for any %iss" noiseto stop. Then unscrew the capall the way. Be careful not to spill gasoline. Clean gasoline from painted surfacesas soon as possible. "Cleaning the See Outside of Your Vehicle"in the Index. turn When you putthe cap back on, it to the right (clockwise) until you hear a clicking sound. Make sure you fullyinstall the cap.The diagnostic system can determine if the cap has beenleft off or fuel improperly installed. This would allow to fuel evaporate into the atmosphere. See "Malfunction Indicator Lamp" in Index. the NOTICE: If you need a new cap, be sure to get theright type. Your retailer can get one you. If you get for the wrong type, may not fit properly. This may it cause your malfunction indicator lamp to light and your fueltank and emissions system may be damaged. See "Malfunction Indicator Lamp" in the Index. 6-7