1999 Subaru Impreza Owner's Manual - Page 60

Doors and locks J Fuel filler cap D Make sure that the cap is tightened until it clicks to prevent fuel spillage in the event of an accident. D Always use a genuine SUBARU fuel filler cap. If you use the wrong cap, it may not fit or have proper venting, and your fuel tank and emission control system might be damaged. CAUTION HG0005, HG0006 To take off the fuel filler cap, turn it slowly counterclockwise and remove the cap. While refueling, hang the cap on the cap holder inside the fuel lid. To put the cap back on, turn it clockwise until you hear a clicking noise. NOTE If the fuel filler cap is not tightened until it clicks, the CHECK ENGINE warning light may come on. Refer to the "Warning and Indicator Lights" section located in chapter 3. J Refueling After the fuel filler nozzle has automatically stopped, do not add any more fuel. If you spill any fuel on the painted surface, rinse it off immediately. Otherwise, the painted surface could be damaged. Such damage is not covered under the SUBARU Limited Warranty. - CONTINUED - 1-29