Ford F-650 2015 Owner's Manual page 108

Diesel Engine
WARNING: Using low sulfur (16-500 ppm) or high sulfur
(greater than 500 ppm) diesel fuel in a diesel engine designed to
use only Ultra Low Sulfur Diesel fuel causes certain emission
components to malfunction which may also cause the Service Engine
Soon light to illuminate indicating an emissions-related concern. It may
also increase the likelihood of engine oil dilution with fuel which may
lead to major engine damage
WARNING: Do not mix diesel fuel with gasoline, gasohol or
alcohol. This could cause an explosion resulting in personal
injury.
WARNING: Do not add gasoline, gasohol or alcohol to diesel
fuel. This practice creates a serious fire hazard resulting in
personal injury and engine performance problems.
WARNING: Do not use starting fluid such as ether or gasoline.
Such fluids can cause immediate explosive damage to the engine
and possible personal injury.
WARNING: Do not use home heating oil or any diesel fuel not
intended for highway use. Red dye is used to identify fuels
intended for agricultural and non-highway use. Damage to the fuel
injection system, engine and exhaust catalyst can occur if an improper
fuel is used.
Note: Use of any fuel other than those recommended may cause
powertrain damage, a loss of vehicle performance, and repairs may not
be covered under warranty.
Use only Ultra Low Sulfur (15 ppm Sulfur Maximum) No. 1-D or 2-D
diesel fuel in your diesel engine. Diesel fuel No. 1-D or winter diesel fuel
blend of No. 2-D is recommended at ambient temperatures below 20°F
(-7°C). Diesel fuel that is blended with 20% biodiesel maximum may be
used.
2015 F-650/750 (f67)
Owners Guide gf, 2nd Printing, April 2014
USA (fus)
Fuel and Refueling 107