Recycled Engine Coolant; Coolant Refill Capacity; Severe Climates - Ford 2006 F-350 Owner's Manual

Maintenance and Specifications

Recycled engine coolant

Ford Motor Company does NOT recommend the use of recycled engine
coolant in vehicles originally equipped with Motorcraft Premium Gold
Engine Coolant since a Ford-approved recycling process is not yet
available.
Used engine coolant should be disposed of in an appropriate
manner. Follow your community's regulations and standards for recycling
and disposing of automotive fluids.

Coolant refill capacity

To find out how much fluid your vehicle's cooling system can hold, refer
to Refill capacities in this section. If your vehicle is equipped with a
diesel engine, refer to the Refill capacities section of your 6.0 Liter
Power Stroke Direct Injection Turbo Diesel Owner's Guide
Supplement.
Fill your engine coolant reservoir as outlined in Adding engine coolant
in this section.

Severe climates

If you drive in extremely cold climates (less than –34°F [–36°C ]):
• It may be necessary to increase the coolant concentration
above 50%.
• NEVER increase the coolant concentration above 60%.
• Increased engine coolant concentrations above 60% will
decrease the overheat protection characteristics of the engine
coolant and may cause engine damage.
• Refer to the chart on the coolant container to ensure the
coolant concentration in your vehicle will provide adequate
freeze protection at the temperatures in which you drive in the
winter months.
If you drive in extremely hot climates:
• It is still necessary to maintain the coolant concentration
above 40%.
• NEVER decrease the coolant concentration below 40%.
• Decreased engine coolant concentrations below 40% will
decrease the corrosion protection characteristics of the engine
coolant and may cause engine damage.
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2006 F-250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA (fus)