I Was Talking To A Buddy Of Mine Who Is Lookng To Buy A New Truck. He Got A New Jo That He Needs More Truck For. Anyways, He Mentioned His Boss Has A Cummins 2500 That He Put A Chip In. Said He Went From The Teens To 20s On Average For Mpg, And Got A High Of 28 On A Trip To Houston. Anyone Heard Of These Kinds Of Numbers? Is It Just Cummins? Is It Just The Brand New Ones?? I Read An Article In Diesel Power Where One Of The Guys With His Truck Heavily Modded Got 22 In A Test, Which Makes Me A Little Less Skeptical, But Still. If I Could Get That Sig Much Better Economy In A Dodge Over A Ford It Would Make Me Consider One. I Just Hope They Change That Front End.