Ford F-650 2018 Owner's Manual page 271

• Reduced engine performance.
• Reduced fuel economy.
• Degraded brake performance.
Note: An engine block heater is
recommended at temperatures below
–10°F (–23°C).
Engine Oil Specifications
The use of correct oil viscosities for diesel
engines is important for satisfactory
operation. Determine which oil viscosity
best suits the temperature range you
expect to encounter for the next service
interval from the following SAE viscosity
grade chart.
F650750 (TBC) , enUSA, Edition date: 201708, First Printing
Capacities and Specifications
E163370
268