UHaul trailer, 4x8, PACKED. A row of boxes behind the front seat of the Vibe and some other light items filling out the rest of the back.500 mile trip from west Texas to Austin. West Texas winds blowing 25 to 30 mph against or crosswind the entire trip.First 200 miles was with OD off, 3000 rpm, about 55/57 mph...22.5 mpg.Next 300 miles with mostly OD on, 60 mph, off for occasion step grade, averaged 25 mpg.The Vibe performed PERFECTLY...much better than my 99 Nissan pickup.Vibes ROCK!!!!!!