1 Census 2010 Race for Effingham County, Illinois. 2  Census 2010 Latino for Effingham County, Illinois. 3  Census 2000 Race for Effingham County, Illinois. 4  Census 2000 Latino for Effingham County, Illinois.  Illinois Voters for Effingham County, Illinois.
On average, a truck traveling at 65 mph instead of 75 mph will experience up to 27-percent improvement in fuel consumption. As a rule of thumb, for every one mile per hour increase in speed, there is a corresponding 0.14 mile-per-gallon (mpg) fuel consumption penalty, says Kedzie.
More than 33 years ago, 33 truckers competed in a fuel economy contest dubbed the Double Nickel Challenge.. Named after radio slang for the 55-mile-per-hour (mph) speed limit then in force in the United States, the goal was simple: to test the claimâcommon among truckers at the timeâ that big rigs got better mileage at higher speeds.