I have a 1999 F150 4.6L 4X4.
I pull a 3500LBS trailer about 15 weekends a year mostly on the hi-way a lot of hills but some off road (logging roads and fields) Minnesota.
What would you recommend?
Diablo two stage with 87 octane program?
Thank you
Tlukes

 

I don't recommmend an 87 octane program. It will only firm up the shifting and do very little for the horsepower. That 4.6 needs all the help it can get in these trucks, especially with that load. I'd suggest a two stage chip with a premium program. Will you just be using the performance setting while towing?

 

Yes, when I am pulling the trailer. I was hoping to get a little better gas milage using 87% gas.
Tlukes