Car and Driver's ranking comes from the extensive instrument tests we conduct on hundreds of vehicle models every year, as well as the subjective impressions our professional editors gain in real driving environments. To select the best diesel truck, we tested both the gasoline and diesel versions of each model, covering approximately 200 data points, including acceleration, handling, comfort, cargo space, fuel economy, value for money, and fun to drive. We take rankings very seriously because we want you to have a comprehensive understanding of the vehicles you are interested in. This list includes both heavy diesel and light diesel vehicle models.