If you were only getting 12-14 in town, maybe you lost your lead-foot at 3K miles. Did you buy new shoes ? A step change of ~30% increase in MPG sounds like more than just engine break-in - are you sure you didn't alter your driving style ?atertan said:I crossed 3000 miles on my 2010 terrain about a week ago and got an almost immediate boost in MPG of 4-6. I used to get 12-14 in town and now get 18-22. seems crazy but have verified with new tanks of gas. seems strange right.