Ford Freestar 2006 Owner's Manual page 82

Driver Controls
An oil change is required whenever indicated by the message center.
USE ONLY RECOMMENDED ENGINE OILS.
To reset the oil monitoring system to 100% after each oil change
[approximately 5,000 miles (8,000 km) or 180 days] perform the
following:
1. Press the SETUP control to
access the System Check function.
2. Press and release the RESET
control to display "OIL LIFE XX%
HOLD RESET NEW".
3. Press and hold the RESET
control for 2 seconds to display "IF
NEW OIL HOLD RESET".
4. Press and hold the RESET
control to display "OIL LIFE SET
TO 100%". Your oil life is now reset.
To reset the oil monitoring system to your personalized oil life %:
1. Press the SETUP control to
access the System Check function.
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