What is the standard mpg in an 18 wheeler?

Answer by  misterhrcpins (455)

The simple answer to this question is 4-8 miles per gallon. However, this figure can vary drastically depending on the age of the 18 wheeler and the road conditions during use.

Answer by  jdw (11)

The average miles per gallon of 18 wheeler trucks is 9 mpg. However, depending on what engine the truck has and what model the truck is, the miles per gallon can range from 5 miles per gallon on older models up to 12 mpg for a medium-duty hybrid delivery truck.