Originally Posted by JasonGauthier
Bought my 2008 Impreza 2.5i wagon in early February. Have 1,200 miles on it. I was averaging 28.5 mpg for my 100 mile daily commute. I reset the computer this morning, changed my route (more highway), used cruise control set at 70mph, and parked my car after 48 miles later with . . . 31.8mpg! That is with the last 5 miles driven on Pennsylvania Ave (heading into DC)!
I must say I am thoroughly pleased with this, especially after trading in my 16mpg truck!
I've played with the tripmeter and got similar results for pure highway trips. It will usually average back down with the few miles you might drive before and after the ramps.
However, still 30+ for highway time is a good thing.
Try going 55-60mph and it goes up even more.
I hate to say it, but it does pay to slow down.