Acer288

I'm at 2k+ miles and have increased to an average of 36.5 mpg. My driving has been pretty consistent as I stated above. I tried one fill up of premium and averaged 38.5. But clearly the economics do not work out to use premium (see below) The chart record generally shows a gradually increasing fuel economy with each fill up. During the premium fuel test I conducted, I was also on my way from VT to CT (mostly down hill) and hit an average of 46 mpg During the 112 mile trip! But soon as I started my sea level trips to work, the mileage dropped back to the 38.5 I noted above. Anyone else?

Similar to pal..22 i have limited miles on my new es300h. I am at 300 miles and i am averaging 34.1 mpg. Some additional notes: 1 i have driven in economy mode almost entirely. 2 mostly highway at 75 mph on cruise control. I would estimate 80/20 highway/city. 3 i do not know the fuel grade. Fuel came with the car. 4 its been 60-70 F hence heat and a/c have been minimal. I'm pretty patient and am looking forward to refueling and starting this experiment again. I'll post my mph again next week (~300 miles per week).