FORD 2011 Ranger v.2 - Manual (Page 237)

ENGINE COOLANT
Checking engine coolant
The concentration and level of engine coolant should be checked at the
intervals listed in the scheduled maintenance information. The coolant
concentration should be maintained at 50/50 coolant and distilled water.
Coolant concentration testing is possible with a hydrometer or antifreeze
tester. The level of coolant should be maintained at the FULL COLD
level or within the COLD FILL RANGE in the coolant reservoir. If the
level falls below, add coolant per the instructions in the Adding engine
coolant section.
Your vehicle was factory-filled with a 50/50 engine coolant and water
concentration. If the concentration of coolant falls below 40% or above
60%, the engine parts could become damaged or not work properly. A
50/50 mixture of coolant and water provides the following:
• Improved freeze protection
• Improved boiling protection
• Protection against rust and other forms of corrosion
• Enables calibrated gauges to work properly
Maintenance and Specifications
237
2011 Ranger (ran)
Owners Guide, 2nd Printing
USA (fus)