Oh, a '17 Niro! I've averaged a bit over 52 mpg so far with 16,000 miles, but expect that to drop over this winter (bought end of Jan). I limit my speed to 65 mph and drive carefully for best mpg. It is a 2018 with 16" wheels. The models with 18" wheels get about 20% lower mpg. I think most owners with 16" wheels get high 40's or low 50's, at least the ones who actually calculate a running average.
Significant difference between summer and winter driving results. I had several thousand miles this summer with 59 mpg when temps were over 80. Currently at about 35 degrees, I'm getting 49/50. This happens with all cars and the percentage drop is similar at around 18-20% but in whole numbers it is larger than ordinary cars because the starting point is so high.
2018 Kia LX HEV Metal Stream with Advanced Tech