Owner's Manual
Page 216
Cleaner air Ford endorses the use high quality fuel of the recommended octane... (particularly in the United States) because it may be used . 216 2003 Crown Victoria (cro) Owners Guide (post-2002-fmt) USA English (fus) If the problems persist, see your dealer or a qualified service technician. It should be void...provide improved performance and emission control system protection for your fuel tank if you are experiencing starting, rough idle or hesitation driveability problems during a cold start, try a different brand of "Regular" unleaded gasoline. "Premium" unleaded gasoline ...
Cleaner air Ford endorses the use high quality fuel of the recommended octane... (particularly in the United States) because it may be used . 216 2003 Crown Victoria (cro) Owners Guide (post-2002-fmt) USA English (fus) If the problems persist, see your dealer or a qualified service technician. It should be void...provide improved performance and emission control system protection for your fuel tank if you are experiencing starting, rough idle or hesitation driveability problems during a cold start, try a different brand of "Regular" unleaded gasoline. "Premium" unleaded gasoline ...