I have a Honda VRV 2010 LX 4wd automatic with 6000 miles used that I bought from a dealer. I have had it for ten days or so. The gas mileage is extremely low. The mileage indicated often indicates I am using gas at rate of 16 - 18 miles per hour. On highway driving, it definitely improves to 23 mpg but still so low. I am using Ac but that shouldn't drive the mileage down that much (I think). I also noted that when I refilled the second time, my gas mileage improved to about an average of 23 mpg but now seems to be slipping again. I brought the car into the dealer to check on car but he said that the gas mileage will improve after two to three oil changes and not to expect advertised mph pf 21 to 27 until then. Said everything else was okay. The dealers explanation just doesn't make sense to me....Thoughts anyone?