I did a 1000 mile mostly freeway roadtrip, and average cruising speed at 72mph, got 27mpg on regular.
I've estimated that I get about 23mpg cruising at 80mph, 25-27mpg crusing at 70-72mph, and 27-30mpg crusing at 70mph. Which is pretty good because my Signature is rated 27 for highway and I...