I just drove round tripfrom Sacramento to San Diego and put 1,075 miles on my Highlander Hybrid Limited 4WDi. I was mostly in the fast lane going from 70 to 80 miles per hour (sometimes faster). Traffic was heavy as usual in the LA and San Diego area. Going up the Grapevine was, as you might expect, no problem. My average mileage for the total trip was 27.8 mpg. No complaints from me regarding gas mileage. No problem getting the EPA estimated 31 mpg in town either. My calculated mileage versus what the computer says is the same (within reasonable error) Wes