Ford 2013 Flex Owner's Manual page 396

Scheduled Maintenance
Edge/MKX AWD only: Vehicles operating off-road in sand during high
ambient temperatures must replace the AWD PTU (All-wheel drive
Power Transfer Unit) lube every 20000 miles (32000 kilometers).
Engine air filter & cabin air filter replacement: Engine air filter and
cabin air filter life is dependent on exposure to dusty and dirty
conditions. Vehicles operated in these conditions will require frequent
inspection and replacement of the engine air filter and cabin air filter.
ENGINE COOLANT CHANGE RECORD
Initial change Six years or 100000 miles (160000 km)
(whichever comes first)
After initial change Every three years or 50000 miles (80000 km)
Engine Coolant Change Log
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2013 Flex (471)
Owners Guide gf, 4th Printing, December 2012
USA (fus)
:
RO#:
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395
D V :
EALER ALIDATION
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ODE
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M :
ILEAGE
D V :
EALER ALIDATION
P&A C :
ODE
H :
OURS
M :
ILEAGE
D V :
EALER ALIDATION
P&A C :
ODE
H :
OURS
M :
ILEAGE