【How-to】How many gallons does an 18 wheeler hold

Most semi-trucks will last between 750,000 and 1,000,000 miles. With that said, some semis have been known to hit 4 million miles. Moreover, many truckers agree that the “break-in” on trucks is somewhere around 50,000 miles, although there are some who say it’s much higher, like around 500,000 miles.