Page 264 of 312

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.
2006 F-250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA (fus)Maintenance and Specifications
264
Page 266 of 312

When fail-safe mode is activated
You have limited engine power when in the fail-safe mode, so drive the
vehicle with caution. The vehicle will not be able to maintain high-speed
operation and the engine will run rough. Remember that the engine is
capable of completely shutting down automatically to prevent engine
damage, therefore:
1. Pull off the road as soon as safely possible and turn off the engine.
2. Arrange for the vehicle to be taken to a service facility.
3. If this is not possible, wait a short period for the engine to cool.
4. Check the coolant level and replenish if low.
Never remove the coolant reservoir cap while the engine is
running or hot.
5. Re-start the engine and take your vehicle to a service facility.
Driving the vehicle without repairing the engine problem
increases the chance of engine damage. Take your vehicle to a
service facility as soon as possible.
FUEL FILTER
For fuel filter replacement, see your authorized dealer. Refer to the
scheduled maintenance information for the appropriate intervals for
changing the fuel filter.
Replace the fuel filter with an authorized Motorcraft part. The
customer warranty may be void for any damage to the fuel system
if an authorized Motorcraft fuel filter is not used.
WHAT YOU SHOULD KNOW ABOUT AUTOMOTIVE FUELS
Important safety precautions
Do not overfill the fuel tank. The pressure in an overfilled tank
may cause leakage and lead to fuel spray and fire.
The fuel system may be under pressure. If the fuel filler cap is
venting vapor or if you hear a hissing sound, wait until it stops
before completely removing the fuel filler cap. Otherwise, fuel may
spray out and injure you or others.
2006 F-250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA (fus)Maintenance and Specifications
266
Page 287 of 312

REFILL CAPACITIES
Fluid Ford Part Name Application Capacity
Front axle Motorcraft SAE
80W-90 Premium
Rear Axle
Lubricant F-250/350
(Dana 60 axle) 5.8 pints (2.8L)
F-350/450/550
(Dana 60 axle) 5.8 pints (2.8L)
Rear axle Motorcraft SAE
75W-140
Synthetic Rear
Axle Lubricant F-250 /350
(10.50 inch axle) 1
6.9 pints (3.3L)
Motorcraft SAE
75W-90 Synthetic
Rear Axle
Lubricant F-350
(DANA 80) 1
8.5 pints (4.0L)
Motorcraft SAE
75W–140
Synthetic Rear
Axle Lubricant F-450/550
(Dana
S110/S130) 1
14.0 pints
(6.6L)
Brake fluid (and
clutch fluid-if
equipped) Motorcraft High
Performance DOT
3 Motor Vehicle
Brake Fluid All Fill to line or
step (for clutch)
on reservoir
Engine coolant -
gas engines 2
Motorcraft
Premium Gold
Engine Coolant
(yellow-colored) 5.4L V8 engine
with A/C 26.4 quarts
(25.0L)
6.8L V10 engine 27.5 quarts
(26.0L)
Engine coolant -
diesel engine 2
Motorcraft
Premium Gold
Engine Coolant
(yellow-colored) Refer to your 6.0 Liter Power
Stroke Direct Injection Turbo
Diesel Owner’s Guide Supplement
Engine oil
(includes filter
change) - gas
engines 6
Motorcraft SAE
5W-20 Premium
Synthetic Blend
Motor Oil (US)
Motorcraft SAE
5W-20 Super
Premium Motor
Oil (Canada) 5.4L V8 and 6.8L
V10 engines 7.0 quarts
(6.6L)
2006 F-250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA (fus) Maintenance and Specifications
287