The average miles per gallon of a semi-truck is bad enough when barreling down the highway — somewhere in the range of 6-8 MPG — but things don't look much better when the 18-wheeler's at a standstill ...
MSN: Best truck MPG in 2026: The most efficient non-electric trucks on the market
Best truck MPG in 2026: The most efficient non-electric trucks on the market
It's a "semi" trailer because it doesn't have its own engine, front axles and wheels, transmission, and so on. Thus, "semi-truck" is a nickname for a truck that carries a semi-trailer.
SEMI meaning: 1 : 54114; 2 : 3 / ˈsɛˌmaɪ/ US : a short, heavy truck that has a long trailer attached to the back and that is used to move goods : semitrailer
The newest semi-trucks get the best fuel efficiency, generally. However, if you want to know more than that, we have a list below. Fuel efficiency is difficult to find for semi-trucks because there ...
Building trucks is tough. Some of the biggest carmakers in the world tried their hand at building semi-trucks and then withdrew from the market. Dodge's Big Horn semi-truck failed. GMC and Chevrolet ...
TFLstudios on MSN: Diesel vs gas - if you think diesel trucks get better mpg on the highway, watch this comparison!
Diesel trucks are often assumed to deliver better fuel economy, especially on the highway. But real-world testing can challenge that assumption. This comparison looks at actual MPG results under ...
Diesel vs gas - if you think diesel trucks get better mpg on the highway, watch this comparison!