What effect does towing have on fuel efficiency?

When towing, fuel efficiency is significantly impacted due to the additional weight and drag that the towed vehicle or object adds to the towing vehicle. This increase in load requires more energy from the engine, which results in higher fuel consumption. Studies and practical driving experience show that towing heavy loads can reduce fuel efficiency by a significant percentage, often cited as high as fifty percent or more, depending on the specifics such as the weight of the trailer, the type of vehicle, and driving conditions. The additional strain on the engine means it operates less efficiently, contributing to decreased miles per gallon (MPG). This understanding is crucial for drivers who plan to tow loads, as it allows them to budget for fuel costs accordingly and make informed decisions about when and how to tow.