Join Date: Sep 2009
Location: Brownsville, TN U.S.A.
They are correct, but try not to think about it in terms of mph. If you really want to max your mpg you have to drive by your instant mpg display and not your speedo. Here is an example:
I took I40 to work today instead of my normal two lane road because I had to stop at a store. I got on the interstate and sped up to 65 mph. I then leveled out my speed, and started letting up on the peddle. I got my instant mpg monitor to 44, and kept it there by varying the pressure on the peddle.
When I went up hill the car slowed down, and I had to let up on the peddle to keep my mpgs at 44. When I went downhill the car would speed up and I had to give it more gas to keep the car from going over 44. This caused my speed to vary from 50 mph to 70 mph.
In short (I know, too late) if you are looking for mid 30s drive slower. If you are looking for 40 and beyond, you have to work at it.