On Mon, 03 Aug 2009 21:40:51 -0700, JR North
wrote:

Factory MPG figures are eeked out under the most carefully staged
conditions. The advertised HWY MPG for your vehicle is a figure you
might only achieve on a flat, smooth road, no passengers or A/c,5 psi
over-inflated tires, on a 58° day with 65% humidity, at 4000ft
elevation. YMMV, usually a rather big amount from the "HWY" figure.
I drove a new Jeep Liberty rental for a while in 2003. That POS got
amazingly poor mileage, prolly 10-12 MPG city. My F250 390 gets that.

My F-250, 7.3 liter diesel, got 16/17 around town and 22/23 on the
highway.

My F-150, 5.4 liter Triton gets12/13 around town and an amazing 17 on
the highway.

Go figure.