I recall reading an article in SOCO magazine a few months back about saving gas. The author suggested that by reducing speed and driving 5 MPH under the posted speed limit, you could save considerable fuel. What a farce I thought. No way could you save that much by slowing down that little. Who in today’s high-speed society is going to drive that slowly?
I was on a road trip recently, so I decided to test this off the wall theory myself. The following numbers are from highway driving on flat roads with moderate traffic. When I drove the 65 MPH speed limit, I got 24 MPG. I slowed to 60 and got 26 MPG. Big deal I thought two whole miles per hour. Then I increased to 70, 75, & 80 and got 22, 20 and 16 MPG, respectively. Now that is a big difference!