islandbeef

Wider wheels will worsen your MPG.

There's a reason that the ES 300h and Prius use the narrow, bagel tires instead of the wide, low profiles we love.

jkeller

Just back today from Vegas, 2800 miles round trip, average 27.3MPG from my driveway to Vegas and back. That's by the car's computer. I didn't keep track myself. On long flat stretches we were getting 32MPG even with cruise pegged to 80mph. We got the lowest in the Texas hill country and Wickenburg highway in AZ, 25mpg. A lot of 6to7% grades on hills. Some observations. The car is very quiet cruising down the highway, only heard the engine when accelarating to highway speeds. A lot of cruise control 75-80, except for one stretch from Kingman AZ to Hoover Dam. Cruise set at 95, and wasn't passing too many folks even at that speed. Seats are very comfy, even for long stretches. We used the Enform Bing voice searches to find places along the way. The voice recognition system works really well, having no problem searching for Red Rock Casino or Hard Rock Casino, and getting it right the first time. We both enjoyed the XM radio. Right now there are several stations with Xmas music- we must have heard Burl Ives sing Have a holly jolly Christmas 10 times.