FORD 2013 E-450 v.1 - Manual (Page 215)

Before adding any fluid, make sure the correct type is used. The type of
fluid used is normally indicated on the dipstick. Refer to the Technical
Specifications table in the Capacities and Specifications chapter.
If necessary, add fluid in 1/2 pint (250 ml) increments through the filler
tube until the level is correct.
If an overfill occurs, excess fluid should be removed by an authorized
dealer.
Maintenance 215
2013 Econoline (eco)
Owners Guide gf, 1st Printing
USA (fus)