2010 Dodge Ram 3500 Laramie Dually Turbo Diesel 4×4. Buy or Lease? By Diesel Performance Truck on April 30, 2010 in www.autonetwork.com How to get the best price? Should I lease or buy? Walk around the new Dodge 3500 Laramie Dually with Cummins turbo diesel and it’s a 4×4. More torque in this heavy duty pickup.