Had my wife's Escalade in for service and was given a 14 XTS. Car had 850 miles on it and when I dropped it back at the dealer I drove @ 500 miles. I checked the DIC and it was averaging 23 MPGs!! Second time I had an XTS loaner. I'm impressed with the gas mileage...it was a fair amount of highway but that mileage for the size car I think is amazing!! I'm not used to gas mileage with an Escalade and a V.