Well the trans in my F350 went after being rebuilt a month before so I through my Burb together in a week and test drove it 350 miles to school, made it with few issues!
I averaged 18mpg. I believe I get around 30mpg at roughly 60mph and 20mpg at roughly 72mph with rolling hills. I need to work on sound deadening, thinking of using Yoga mats because I can not afford Dynapad and/or Dynamat.