Ford 2006 Ranger Owner's Manual page 251

Maintenance and Specifications
POWER STEERING FLUID
• 2.3L I4 engine
• 3.0L V6 engine
• 4.0L V6 engine
Check the power steering fluid. Refer to the scheduled maintenance
guide for the service interval schedules. If adding fluid is necessary, use
only MERCON ATF.
251
2007 Ranger (ran)
Owners Guide (post-2002-fmt)
USA (fus)