I put an eforce on, no gearing change, getting similar mileage to what I got before SC.
Of course, if you are in it all the time, it'll go down quick.
The eforce and traction control don't get along real well. It wants to pull back as soon as it breaks loose and sometimes its pretty harsh when it pulls it back.
With TC off no bucking, surging, etc.
2013 BBK Short tube, E-Force Stage 2, M/T 245/18/40 DR's, BMR LCA's, Alum D/S, Strange FRT adjustable struts