I'm not sure why all the fluctuation of gas mileage,but my 2011 nissan juke sv is getting 29 mpg on the highway. I do run on cruise control to get the best gas. In the city i hot rod and yes only get 23 mpg. I mostly run in normal,but i am very pleased with the performance. Overall I love this car, it does what i want it to and then some. I bought this car to drive and it has exceeded my expectations.