My brother just bought one of these, he says i can use it on my truck as well, from what i searched on here i'm thinking that's a bad idea. Since all the threads I've seen on here were pretty old, can anyone tell me if there's new programming for those that can give me a little better mpg, and or hp and torque, withought killing my tranny, or anything else on my truck? Also I know the spartan is invisible when you put it all back to stock, anyone know about the bullydog? Or will it kill my warranty?