I don’t have a turbo. my hwy commute I get 30-32 mpg. Where I live is mostly flat.Read over 30 reviews on Surecritic...alll glowing. But several people expressed disappointment with the mileage.
I don't expect much from the turbo-I couldn't keep it off boost either.
But how are you doing with the base engine??
I had the same results. I usually drive under the limit or around 65mph regardless. My lady and I did a 300 mile round trip. There was a stretch of highway that I was up to 40 MPG and by the time I refilled the tank after the trip it had leveled off to about 35 MPG for the round trip average. It drove great but we are in Oklahoma and Texas so mostly flat land and a few small hills and pike pass thru the toll booths.25mpg normal city driving.
35mpg long highway road trip doing the speed limit with cruise control
I have noticed that the electronic MPG gauges I have are extremely optimistic! On my 2007 Mustang it is 1 to 1.5 MPG better than actual miles per gallon after filling up. On my 2015 Colorado it is often about 1 mpg difference. On the Colorado though it is often very close when doing strictly hiway miles. This is over a period of 4 or 5 years of keeping track in a log book.I don't know how y'all get more than suggest the mpg 21-27. It's exactly what I get in City and Highway.