Just got my flashpaq. WOW, what a difference! I have a 2009 with auto 3.73, 33s and I installed the 87 tune. I can only image how much better it would be with gears.

 

very nice!!

 

Please elaborate on the benefits. I have a 2008 auto, 3.73 and stock tires (not sure what size that is on my "s" package). Did your basically stock Jeep get an increase in mpg's?

 

+1 add to this as well please...

 

Would love to know about mpg as well as throttle...shifting...any changes...have you used the crawl tune?

 

http://www.servicemix.org/mileagexs.html

I visited the website and apparently there's a mileage tune to get 10% more mileage. Doesn't sound like much, but do the math and 10% is actually quite a good improvement, if they're not lying:

18.5 mpg x .10= 1.85 miles more per gallon x 22.5 gallons (JKU tank)= an extra
41.625 miles per tank (or 450 miles total per tank) / $3 per galllon= $13.875 worth of extra fuel per fillup.

It'd pay for itself in less than a year. Hmmm... perhaps I'll get one.