Do also read and understand the various postings relating to real-world fuel consumption. There are a few here that get very high MPG (equivalent), but there are also a few who are very disappointed by the running costs. Your pattern of use has to be very specific to get the theoretical figures of 150mpg or better. Realistic performance comes in at between 50mpg and perhaps 80mpg - though even that is not easy to achieve if you are using it as a general purpose car. Some have reported figures as low as 30mpg - certainly possible if your journeys are predominantly long and you regularly ignore the speed limits.
Unless you have a roof full of solar panels, completely ignore any suggestions of multiple hundreds of miles per gallon - they are conveniently ignoring the cost of electricity. If you pay for your electricity at more or less standard rates, your effective mpg can never exceed about 200mpg - and that only applies to very specific patterns of usage.