so I have finally got to the stage where I need/want a tune. My biggest objective is better gas mileage. Right now the current job site is 90 miles one way and I’m going thru 2 full tanks a week. So I’m torn between the sofa king touchscreen all in one or the Gde route. If mileage was your biggest concern and you never tow anything which tuner would you go for. Stock truck stock tire size. Thank you in advance for your help.