haha, it was painful! although the posted limit varied 55 to 65 so people weren't passing me all the time. my little sister was telling me to step on it most of the time (which is weird because she hates when i speed). plus, cops are known to be all over that highway so it kept me in check.
i was quite surprised with how well it did. i had never seen more than 18mpg on this car with the way i drive it daily (i usually take city roads).
on the way back i was going 70 for the most part.