The most reliable Used pickup trucks are- 1) Toyota Tundra 2) Honda Ridgeline 3) Nissan Frontier 4) Toyota Tacoma 5) Ford F-350 6) Chevrolet Silverado 7) Ford F-250 8) Ram 1500.

According to the U.S. Department of Energy, diesel engines offer 30- to 35-percent greater fuel economy than comparable gasoline engines. Diesel fuel also has higher energy density than gasoline, which means less fuel is required to generate the same power as gas, improving overall fuel economy.

The simple answer is that full-size trucks are larger and can hold a bigger engine. Numbers do vary based on make and model, but according to Motor1 most mid-size trucks can haul 7,000 pounds and most full-size can haul over 10,000 pounds. When comparing payloads, we tend to see a little bit of the same story.