Did you know that for every 5 mph over the speed limit that you drive, you reduce your fuel economy by nearly 6%. Yes, you may get there faster, but at a higher per mile cost.
Let's do the math. Let's say that the speed limit is 65 mph and your vehicle gets 30 mpg. So if you decide to drive at 70 mph you will be getting just over 28 mpg, 75 mph will reduce it further to about 26.5 mpg.
This may not seem like much, but consider a 15 gallon tank on your car and all your driving is on the highway. At 70 mph your need to fill up went from 450 miles per tank to 420 miles per tank. 75 mph = 390 miles per tank.
In this scenario, the extra 5 mph over the speed limit equates to an additional gallon of gas.
Also, driving at higher speeds creates more wear on your tires and brakes, uses more fuel and results in more carbon emissions.
So consider this the next time you want to drive faster, every 5 mph you average over the speed limit is another gallon of gas, and let's face it, we all complain about the cost of gas, so why would we want to pay anymore?
Of course, you have to weight the extra time you might gain against the extra fuel cost, inherent additional wear and tear cost and of course, that potential for a speeding ticket.
BTW, slowing down and saving some money may provide you with enough extra cash to buy that Radar Detector