Aaron Answers: Why do large pickup trucks have only slightly better MPG than 18-wheelers

My Answer: A fully loaded semi-truck and trailer weigh in at up to 80,000 pounds gross. A loaded heavy-duty pickup truck and trailer can weigh in at 40,000 gross. So roughly half the weight. But the pickup will be producing less torque, will have a less highway-tuned drivetrain, and will likely be less aerodynamic than is the semi-truck.

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