Im having the same issue actually they suggested me to changed the plug sparks i did so a week ago and its been the same so far! i really though the car would give me more MPG
Without numbers we can't help you. so if you a different system than USGal/US Miles let us know so we can convert. You should be able to do 32 MPG. Considering making a new thread so we track your problem.
Please do not power off, firmware update pending.....