Ford 2013 F-650 Owner's Manual page 290

Scheduled Maintenance
Vehicles equipped with a diesel engine CANNOT use diesel fuel blended
with waste oil if equipped with a catalytic converter-muffler. Waste lube
oil blending in fuel plugs the catalytic converter-muffler, resulting in a
significant loss of engine power.
Noise Emissions Warranty, Prohibited Tampering Acts and
Maintenance
On January 1, 1978, Federal regulations became effective governing the
noise emissions on trucks over 10000 pounds (4536 kilograms) GVWR.
The following statements concerning prohibited tampering acts and
maintenance and the noise warranty are found in the warranty
information, and are applicable to completed trucks.
Tampering with Noise Control System Prohibited
Federal law prohibits the following acts or the causing thereof: (1) The
removal or rendering inoperative, by any person other than for purposes
of maintenance, repair or replacement, of any device or element of
design incorporated into any new vehicle for the purpose of noise control
prior to its sale or delivery to the ultimate purchaser or while it is in use,
or (2) the use of the vehicle after such device or element of design has
been removed or rendered inoperative by any person.
Among those acts presumed to constitute tampering are the following
acts listed:
Vehicle System
Acoustical shielding Removal of noise shields, hood blanket, tunnel
liner or acoustical absorptive material.
Engine Removal or rendering inoperative the engine
speed governor so as to allow engine speed to
exceed manufacturer specifications. Removal of
engine mounted noise shield or oil pan enclosure.
Engine air induction Removal of the air duct, silencer, air cleaner,
and/or air cleaner element and baffle in air
cleaner; re-indexing of air cleaner.
2013 F-650/750 (f67)
Owners Guide gf, 2nd Printing, March 2013
USA (fus)
Acts
289