FORD FCSD TECHNICAL TRAINING FCS-14000-DL - Manual (Page 73)

LESSON 3: POWERTRAIN
• New premium fuel calibration (Navigator).
– The aggressive spark and fuel programming requires 91 octane (or higher) fuel for maximum performance.
Expedition requires 87 octane fuel for optimal performance.
NOTE: Refer to the Workshop Manual for diagnostic and service procedures for these items.
2005 Expedition/Navigator New Model Technician Training 02-SEP-04 3-37