Ford 2013 F-650 Owner's Manual page 128

Note: Do not put DEF in the fuel tank or any other tank on the vehicle.
This can cause damage to components not covered by your vehicle's
warranty.
Your vehicle is equipped with a DEF tank with a blue-capped filler port.
The 5 gallon (19.0L) DEF tank is located on the left side of the vehicle
under the cab. The 9 gallon (34.0L) DEF tank is located on the right
side of the vehicle behind the cab (Regular Cab and Super Cab) or under
the cab (Crew Cab). The tank can be filled using a nozzle at a DEF
filling station (similar to fuel fill) or using a DEF bottle with a spout.
Motorcraft® brand DEF bottles are recommended. Other aftermarket
bottles can be used but should have a seal on the spout and an internal
vent tube to achieve best fill performance and prevent overfilling.
You can purchase DEF at your authorized dealer, most highway truck stops
or you can contact roadside assistance for help in finding a retailer that
sells DEF. See the Customer Assistance chapter for more information.
Also, a government website locator is available for diesel exhaust fluid
supplies. The following web address can be used to find the nearest
location to purchase DEF: http://www.afdc.energy.gov/afdc/locator/def.
Use Motorcraft® DEF or equivalent meeting Ford
specification WSS-M2C130-A and/or ISO 22241. Use
only DEF certified by the American Petroleum
Institute. Look for this certification trademark. Repairs
resulting from the use of non-certified DEF products
may not be covered by your vehicle's warranty.
Maintaining the purity of DEF is important to avoid malfunctions in the
SCR system.
If DEF is removed from the tank for any reason (such as repair work),
the same DEF must not be used to refill the tank as its purity is no
longer guaranteed.
To fill the DEF tank, see your authorized dealer or do the following
(before filling the DEF tank in cold climates, see Filling the DEF tank
in cold climates later in this section):
DEF Bottle Fill with Spout
The following procedure applies to Motorcraft® DEF or similar DEF
bottles. For other brands or bottle types, see the instructions on the
bottle label.
2013 F-650/750 (f67)
Owners Guide gf, 2nd Printing, March 2013
USA (fus)
Fuel and Refueling 127