Why does my 150 only get 13 mpg when it used to get 17
2 Answers
When's the last time it got a tune up? Air filter? Fuel filter?
Depending on where you live refineries have to switch to a winter blend as a certain portion of the year. Maybe they haven't yet and the cold blast may affect your mileage. If everything is within specs try running a tank full of non-ethanol and see if it improves during cold weather.