18-20 HWY. In an 8000# bus. 4x4 diesel Excursion. But at $4/gallon for fuel which has been about $160-$170 to fill, I drive the wifes new CLK convertible as much as she'll let me.
I put over a hundred miles a day on the Prius, its up to almost 200K. I smile evertime I pass you guys sitting in your gas guzzlers at the gas stations.