Ford FIESTA Owner's Manual page 63

Fuel and Refuelling
If you have a prolonged wait at a railway
crossing or at traffic lights in built-up areas,
it is advisable to switch off the engine
during this period.
Vehicle load conditions
Driving in a fully laden condition will result
in high fuel consumption.
Vehicle condition
Low tyre pressure or inadequate engine or
vehicle maintenance will also result in
higher fuel consumption.
61
Fiesta (CDJ)