I'm not the best guy to ask about increasing MPG. I did more to increase the performance, and I typically get 46 in mixed driving. So does my wife in her stock car, but no scangauge to help out. I get a little crazy riding with her sometimes.
I drove 300 miles today across the mountains and thought about your question.
Torque pro on a phone is nice, but as I drove along the nearest place I could put one in my scan was over the top of the vents to the left or right of the wheel. Because of that, and also the fiddly nature of things on phones, I am quite happy to recommend a scanguage install as I did it here.
http://ecomodder.com/forum/showthrea...tml#post427956
It is right in your scan, and no way a phone would fit there and not block the instruments behind. I have been very pleased overall.
It starts up with the car. it turns off with the car. It requires no input from me.
A phone is either a spare phone, in a mount, with a power cable;
Or it is your personal phone that you have to put in the mount, start the app, etc.
That right there is enough for me. I have used my phone for nav, for example. It works, but not nearly as nice as a dedicated GPS.
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle
currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears