I took the Lexus RX400h in for the 20,000 mile service today. I am on a pace to drive 23,328 miles in the first year. I am averaging 25.0 mpg since I brought the car, up slightly from 24.8 mpg after 10 months and 24.9 at 6 months, but down slightly from 25.1 after 3 months. The EPA rating is 24 on the highway and 26 in the city.
After listening to a NPR podcast about trials that were being held in Seattle with people driving hybrids and hearing the coaching that they were giving the drivers, I am getting better mileage and have pulled up my average miles per gallon. I actually got over 27 mpg on two tanks in April.