Ford 2011 Focus Owner's Manual page 294

Scheduled Maintenance Guide
COOLANT CHANGE RECORD
❑
6 years or 105,000 miles (168,000 km) - change coolant (whichever comes first).
❑
After initial change - change coolant every 3 years or 45,000 miles (72,000 km).
294
2011 Focus (foc)
Owners Guide, 1st Printing
USA (fus)
Engine coolant