Well, I just calculated that my annual fuel cost with my Yaris Auto, even in the worst of conditions, would be less than the Prius If gas was $4.00 a gallon, and I only averaged 48mpg (I am now hitting 54mpg), and drove 12,000 miles a year, which is about 1000 more than I usually do, I would be at 9.5cents/mile. I would be spending exactly $1000 dollars a year in gas. At current prices with my current mpg and mileage ($3.50/gal, 50mpg, 11,500 miles), which comes out to 7cents/mile, I would be paying $805 a year for gas! Compare that to the $1354 the average driver would get if they only achieved the EPA estimates of 31mpg combined. Now THAT'S the perks of hypermiling! I'm gonna get a new bumper sticker to harass FSPs with: "My car runs a year on what your car uses in 3 months!"