Let’s hear your best MPG and driving style ?

I used to check fuel mileage several years ago and was getting about 9mpg. Haven't checked it in many years because it wouldn't make any difference if we got 5mpg. Either way, we will be hitting the highways and seeing the country. I set the cruise control at about 64 mph which seems to be the best mileage according to how fast the needle on the fuel gauge moves...lol