Fuel Tracking – October 2016 – Chart Posted on November 7, 2016March 27, 2021 by nvcallow_iutv1o Posted in AutomotiveTagged Automotive, Car, MPG Winter reaches the North and we switch to winter blend gas. Gas prices and MPG have most leveled off in the summer and fall. In September winter blend gas was introduced, with a sharp decline in average MPG. As seen, the MPG generally follows the average temperature for the month… with some deviation.