10,800-mile road trip â€“ 12 weeks. This was in my 07 Prius. 3 oil changes were the only events involving the Prius. Tires set at 52, 50. 48 MPG. Indeed this was not driving slowly â€“ can you believe the POSTED speed limit in Texas is 80MPH! Always drove about 10% over posted limit. Route included Palm Beach, FL, Charleston, SC, Nashville, TN, Memphis, TN, Little Rock, AR, Dallas, TX, El Paso, TX, Tucson, AR, Scottsdale, AR, La Jolia, CA, Lake Arrowhead, CA (1 week) , Malibu, CA, St George, UT, Salt Lake City, UT, Aspen, CO (9 days), Flat Head Lake, MT (10days), Lake Brule, WI (that was a long link! â€“ 10 days) Chicago, IL, Canton, OH (4 days), Washington, DC ( 10 days) and back to Palm Beach, FL. The trip was not intended as a site-seeing trip. Trip WAS made to see friends (at each stop) who I had not seen over a long period of time. Any questions?