Poor miles per gallon, or MPG, can have many possible causes. In this article, I’ll touch on some of the most common causes of poor MPG and their possible fixes. Most mechanical issues with your vehicle have simple causes. The tendency is to overcomplicate things that we don’t understand, especially when it comes to our vehicles. Trust me, I’ve heard it all, or most of it anyway. If you take a common sense approach, there’s not much that’s beyond your reach, and poor fuel economy is one of those things. So if you have a vehicle that just isn’t getting the mileage it used to, read on and we’ll see if we can get you sorted out.