When I moved to Carlisle, (a 2 hour drive from my old home) The flow of traffic on I-81 moved around 80-85mph the whole way, I set the cruise and in O/D averaged almost 28mpg in my Cougar, and my car had barely enough room for me to ride in it with all the stuff I had.

 

Very nice. But I'm amazed and impressed that a 4,100 pound Blazer is capable of 29 MPG at any speed....let's see, at 80-85, I get 20-21 MPG in the Blazer. My Nova with the original 307 will get 19-20 MPG, but not the greatest "miles per quart of oil". I want a 307 in my Blazer.