Mileage Gains with Superchips Flashpaq Performance Tuner in 2003 Ford Expedition 5.4
Question:
What kind of improvement to fuel economy should I expect? My 1st priority is fuel economy. My 2nd would be about eight weekends a year when Im pulling a 4,600 lbs travel trailer. My final would be the elevation and passes I travel across western Montana. I understand there are multiple settings. My biggest question is about improving fuel economy. Will this pay for itself on a stock 5.4 ? Or do I need cold air induction / throttle body spacer to get a return on this investment? Thanks!
asked by: Mark
Expert Reply:
Mileage gains from using a performance tuner like the Superchips Flashpaq # SU1845 in your 2003 Ford Expedition with 5.4-liter engine can range from 10-15% according to my contact at Superchips. This is a best-case scenario. Do please note that there are a number of factors affecting fuel economy, from the condition and type of tires to the overall condition of the engine, so Superchips cannot guarantee these specific results.
My technical contact there advised that many customers have reported better fuel economy results using the performance setting (with the appropriate fuel grade) than the actual economy tune. For towing purposes you will certainly want to use the tow/performance setting. The tuner does not have provision to directly compensate for varying oxygen levels at higher altitudes, but your vehicle's sensors will.

Product Page this Question was Asked From
Superchips Flashpaq F5 Performance Tuner - Ford - Gas/Diesel
- Performance Chip
- Performance Tuners
- Tuner Only
- Color Screen
- No - Not California Approved
- Flashpaq F5
- Superchips
more information >
Continue Researching
- Q&A: Does Using Tow Modes in Superchips Flashpaq Tuner Increase the Towing Capacity of a Vehicle
- Q&A: Performance Difference Between California and 49 State Legal Superchips Programmer 2001 Ford Diesel
- Q&A: Can Cold Intakes Be Used with Superchips Programmer Installed on 2012 Ford Mustang with a 5.0 Liter
- Q&A: Programmer for Towing and Fuel Economy on a 2013 Ford F-150 3.5 Liter EcoBoost
- Q&A: Max Power from the Superchips Flashpaq F5 Performance Tuner 2017 Ford F-150 3.5L EcoBoost
- Q&A: How Much HP and Torque Can the Flashpaq F5 Give a 1999 Ford Super Duty
- Q&A: Is Superchips Flashpaq F5 Performance Tuner Approved by the California Air Resources Board
- Article: Printable Trailer Bolt Hole Pattern Template
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Article: Trailer Wiring Diagrams
- Article: Converting Your RV Water Heater to Tankless
- Article: Cat-Back Performance Exhaust System Review
- Article: 5 Things to Know About Weight Distribution Hitches
- Article: Stability Control for Heavy Duty Vehicles