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.
Diesel does get more fuel economy than gasoline, and not by a slim margin. Diesel is more than 33% more efficient than gasoline is when it comes to your fuel mileage. This means if you were to get for example, 30 miles to the gallon, a diesel equivalent engine would get 40 miles per gallon. It has a heavy duty Duramax diesel engine, and can produce 22 miles per gallon on the highway, and 21 miles per gallon in the city. 2  Diesel pickup mileage is typically much lower than this since their trucks are often heavy and powerful, but the Silverado is a diesel hybrid that allows it to be fuel efficient.