br You do not necessarily have to change your speed dramatically to see some level of savings. Even if you are completely unwilling to slow down to 55 miles per hour, if you can slow down from 75 to 65 miles per hour, you will still notice that you go through gas a bit slower. The key here is to find a speed that you can live with, but that is not as excessive as the speed that you traveled at before. Also, consider the situation. If you are on a weekend trip to a friend’s house, do you really need to arrive five minutes earlier? If not, simply relax and ease up on the gas a bit.