FORD 2005 GT - Manual (Page 191)

OIL PUMP DRIVE BELT
Change the engine oil pump drive belt if your vehicle has been stored for
an extended period of time (three years or more) without the engine
being operated for at least 30 minutes per year.
2005 GT (gto)
Owners Guide (post-2002-fmt)
USA_English (fus)
Scheduled Maintenance Guide
191