Topped off tank, 600 pounds of people and cargo, 24 degrees F. First half of trip was icy bad roads, so avg speed was just a tick higher than 60 mph - "fake" pulse and glide due to frequent "off the gas" for icy road surfaces...POOTER mpg HOVERED IN THE 32.+ mpg range. Return trip with 300 people pounds and 20 degrees F, I purposely pushed 70 mph for 60 miles (ROAD CONDITIONS MUCH IMPROVED, and I wanted to get a feel for where my hybrid efficiencies began to evaporate) ...POOTER mpg HOVERED IN AT MID 23 mpg's. When conditions worsened and I brought her back down to safe throttle adjustments (forced "fake" pulsing again) but seeking 60 mph, I saw a pooter-indicated 29 mpg's. FINAL PEN & PAPER calculations (topped off at home again just to get my numbers - 132 miles range remained) indicate that this PURE HIGHWAY trip was accomplished at 28.2 mpg's. Entire trip was done in ECO mode, and topography was INDIANA FLAT. The XM Radio and SWEET JBL package soothed my otherwise ice-induced white-knuckled nerves... Booyah!