Does anyone do a mail order economy tune for our trucks? how would it affect performance?

I am getting ready to start a new job driving alot and want to get as much milage as i can without sacrificing any power i have at the moment.

 

Email Allen Nelson.....allen@nelsonperformance.com, or visit his website on the list of sponsors. He mentioned something to me awhile back about trying some out. Might wanna drop him a line and see whats up.