They will range from 4 to 7 miles per gallon.
Gas mileage can vary significatly due to a variety of circumstances. Its a safe bet that newer and more areodynamic models of Semi Trucks will offer the best in miles per gallon.
There hasn't really been a brand of semi trucks recognized as the most fuel efficient. Since they run on diesel a more efficient fuel, semi trucks already are more fuel efficient than cars in terms of size and power.
Reduce your speed and idle less
Most semi trucks have Diesel engines and use Diesel fuel oil to operate. 6 to 7 miles per gallon is considered to be a fairly good average. Terrain and amount of load can affect this average abit.
It depends on if you mean the Volvo semi trucks or SUV. The best semi is the VN430 and the VHD.
Things like semi-trucks and some trucks and every day vehicles use diesel fuel.
The average fuel economy of a semi truck is between 5 and 7 mpg when loaded.
According to the Elmo Kandel, Editor and Publisher of Article Click, a highly efficient semi-truck will get 6 to 8 miles per gallon. Fuel mileage will vary greatly based on the weight of the truck and payload and environmental factors such as wind and grade. Fuel mieage can drop to 4 miles per gallon in less efficient trucks - you need to go to www.fairtran.com to find out more.
You can go to commercialtrucktrader.com to get a quote for your used semi trucks.
The plural form of semi is semis