I have the ts with the 1)50+ 2)75+ 3)100+ 4)140+ 5)stock 6)valet
which one is the one for mileage and fuel economy?

 

If its just a TS performance chip sometimes referred to as canned tunes... It doesn't have an actual economy tune on it. But you will probably get your best mileage in the 75 or 100hp tune.

 

I agree with 95powersmoker, 75 or 100HP setting, and keep your foot out of it.

 

depending on where the fuel curve is on the 140 it could be a good one to. the way i would decide is to put the truck on coast at the speed u spend most of ur time (in my case 70 to 80 so i went with 75) and flipped between the tunes till i noticed it wanted less throttle or i noticed an rpm drop

 

I just put it on a setting, ran a tank of fuel with normal driving to normal places. Whichever gave me the most miles is the one I used most. But 75HP usually gave the best on the interstate.

 

yeah I usually keep it on 75hp

 

I run the 75 hp. 7.3 getting 19 mpg on interstate. I run it at 72 mph. Pulling the gooseneck, I run the 50 hp. TS 6 Position. I have the 6637 air filter. No muffler. Cat broke out. And I have the bridgestone REVO 2 Tires. 285/75/R16. I use the GPS for an accurate speedometer. We run it for hotshot. When you burn $18,000 in fuel a year, every little bit helps!