Honestly, I just wanted to see how accurate the EPA estimates were and see how much my driving directly affects fuel economy. freeway speeds range between 65-75 mph, and surface street speeds are an almost constant 45, sometimes 50 mph. these figures also reflect some quick sprints from time to time.
Below is a snapshot of an Excel spreadsheet I made based on actual figures I key in to the car's calendar/computer every time I refuel since the begining of the year. the ratio of city:highway driving is approximately 90:10, so I just noted that this is the combined figure for both.
any comments/suggestions/reactions welcome.







