I had a similar question after I bought my Edge, a couple years back. I talked to Bill, and he felt my towing performance would be improved by having a customized towing tune based on the weight trailer I had. My trailer is 3600#, and he said the tow tunes were set up more for the 5000# range.
I seemed to pick up about 0.5 mpg on a towing trip (into the Rockies) after loading that custom tow tune. In that 2400 mile trip, the savings almost paid for the tune.
Based on that experience, I had Bill write me a custom "daily driver" tune too, and I'm very happy with it.
I've NEVER tried using 91 or 93 octane gas, so I can't comment on that. Some people have reported greatly improved performance with that fuel though and tunes written specifically for it. You COULD have a tow tune written for the high priced stuff if you wanted.
The best thing to do is talk to Bill about your goals and needs. It's what I did.
Am I detecting a bit of sarcasm in your "location" - Tucson, Mexico?
- Jack
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2024 F150 Platinum SCrew 3.5L PowerBoost FX4, Peragon Tonneau Cover, LineX Bed, 35% Window Tint on All Sides and Rear, Full Nose Paint Protection Film, Husky Mud Guards, Lasfit Floor Liners, VIOFO Dash Cam
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