I'm at 125,500 & I calculate my MPGs via Ram, Garmin & Google maps & Sigic a mapping program that uses no cellphone signals, only GPS. 20-24mpgs freeway before deleted. 24-29 MPGs after deleting+ KN air filter, 2015 Tradesman 2500 QC 4x4 g56 stick, camper shell loaded firestoneHT 275-70-18 at...