Hello. I purchased a model x long range and I am getting much lesser km to actually drive than the rated range. Sometimes less than half. When I spoke to Tesla, they were surprised by this deviation from range estimates but have not offered any concrete reason. My usage is around 285 Wh/km (450Wh/mile) which is not very high. They said rated range is determined at about 250. So why am I loosing more than 2km on my battery for every 1 km actually driven. They said nothing is wrong with battery. Is this concerning enough to return the car under the 7 day period or this is part of life?? Need to know today please. Thanks and appreciate any quick replies.