I just bought a 2006 RX400h and I'm getting like 18 mpg, which from the sounds of it, is terrible. I have tried to do the ISC reset like 3 times and it hasn't worked yet. My engine still kicks on 3 secs after "starting" the veh...and that's with no heater or anything else on. I tried warming up the veh by driving like 10 miles (a combo of city and hwy) and maybe I'm not getting it warm enough but I can't get it to work. I was able to get the green battery thing on my NAV to show "full" ticks on the last try but it still didn't work. Any thoughts from anyone? Do I need to attempt to drive like 30 miles on the highway or something rediculous? The engine temp was at normal (halfway) point when I tried it each time. I'm at a loss and I HATE that I'm getting 18 mpg with a hybrid.
