I have been looking in to EFI live, It looks like something I could do, Im still learning the in and outs on tunning tho. My truck is getting 17city 19 hwy Im no way complaining MPGs My 02 Dodge is getting 13HWY and its half the truck. If I was goin to do diesel Id go Cummins all the way. I hate to say it but I thot hard bout sending it to Baton Rouge and do a cummins swap lol. But for that money Id have to just spend a lil more and get the mega cab and be done with it.