I too had over 30 MPG when I drove my hihy home from picking it up new in las vegas.We went thru canyon lands and many secnic routes.( a lot of mountains) After we got to denver and 950 miles my tank average was 30.4. Have never got that good since.The nent part of the trip 750 miles thru flat ground to minnesota at ave speed 75 and up I averaged 26MPG