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.
Faulty oxygen sensors negatively affect fuel economy. A bad oxygen sensor can cause gas mileage drops of up to 40% by reading incorrect information to the CPU making the vehicle dump wasted fuel into the cylinder and destroying fuel economy. Gas mileage losses can occur with sensors that are just old, worn, and not outputting voltages properly.