See also:

Cleaner air
Ford endorses the use of reformulated “cleaner-burning” gasolines to improve air quality, per the recommendations in the Choosing the right fuel section. ...

Working with the engine on
WARNING: To reduce the risk of vehicle damage and/or personal burn injuries, do not start your engine with the air cleaner removed and do not remove it while the engine is running. 1. Set the par ...

Exceptions
There are several exceptions to the Normal Schedule. They are listed below: Normal vehicle axle maintenance: Rear axles and power take-off (PTO) units with synthetic fluid and light-duty trucks e ...