2008 Ford Crown Victoria Owner's Manual - Page 251

Maintenance and Specifications At the next opportunity, safely pull off of the road, remove the fuel filler cap, align the cap properly and reinstall it. The check fuel cap lamp or "check fuel cap" message may not reset immediately; it may take several driving cycles for the check fuel cap lamp or "check fuel cap" message to turn off. A driving cycle consists of an engine start-up (after four or more hours with the engine off) followed by city and highway driving. Continuing to drive with the check fuel cap lamp or "check fuel cap" message on may cause the lamp to turn on as well. If you must replace the fuel filler cap, replace it with a fuel filler cap that is designed for your vehicle. The customer warranty may be void for any damage to the fuel tank or fuel system if the correct genuine Ford or Motorcraft fuel filler cap is not used. The fuel system may be under pressure. If the fuel filler cap is venting vapor or if you hear a hissing sound, wait until it stops before completely removing the fuel filler cap. Otherwise, fuel may spray out and injure you or others. If you do not use the proper fuel filler cap, excessive vacuum in the fuel tank may damage the fuel system or cause the fuel cap to disengage in a collision, which may result in possible personal injury. FFV (Flex Fuel Vehicle) Fuel Cap If your vehicle is FFV capable it will have a yellow colored fuel cap. Choosing the right fuel If your vehicle is a flexible fuel vehicle (FFV), use only UNLEADED FUEL and FUEL ETHANOL (Ed75-Ed85). 251 2008 Crown Victoria (cro) Owners Guide (post-2002-fmt) USA (fus)