The highest my outlook (07 XR)ever got was 40 MPG that was on the highway traveling at about 65-70 miles per hour soon after I had the throttle plate cleanedsalguod said:According to aCar (my Android car expneses app), I've averaged 17.605 MPG over 50K miles on my '10. Best was 23.844, worst was 10.882 (towing).
Not many '10 Outlooks were made (about 2,500 I think), but the '09 is mechanically identical. You'll get more responses from the Acadia forum.