1998 Oldsmobile Achieva Owner's Manual - Page 235

A CAUTION: If you get gasoline on yourself then and something ignites it, you could be badly burned. Gasoline can spray out on you if youopen the fuel filler cap too quickly. This spray can happen if your tank is nearly full, and is more likely in hot weather. Open the fuel filler cap slowly and wait for any "hiss" noise to stop. Then unscrew the cap all the way. Be careful not to spill gasoline.Clean gasoline from painted surfaces as soon as possible. See "Cleaning the Outside of Your Vehicle"in the Index. When you put the cap back on, turn it the right to (clockwise) untilyou hear a clicking sound. Make sure you fully installthe cap. The diagnostic system can determine if the fuel caphas been left off or improperly installed. Thiswould allow fuel to evaporate into the atmosphere. See "Malfunction Indicator Lamp" in the Index. NOTICE: If you needa new cap, be sure to get the right type. Yourretailer can get onefor you. If you get the wrong type,it may not fit properly. This may cause your malfunction indicator lamp to light and your fuel tank and emissions system may be damaged. See "Malfunction Indicator Lamp" in the Index.