I just got back from a 600+ mile trip with my 06 Acura TL, and once again I’m impressed. I rarely drive the car these days because I use my motorcycle as a daily. For the around town driving I do with the TL, I usually get 21-22 MPG on the trip computer. For it to get 30-31 MPG on this trip is great. The car has 174,500 miles. Acura calls for premium fuel in it but I have been using 87 for the last 4 years. I had the cruise set at 75 mph for most of the trip. It was showing 444 miles until empty the last time I filled up.