Guest: Duane Tegels, VTNA powertrain product marketing manager \nTopic: Aerodynamics account for about 80% of the fuel efficiency gains in the new Volvo VNL, but engine improvements also contributed while helping usher in better performance and durability for the company's flagship over-the-road truck.\nFollow the Truck Tech Podcast\nOther FreightWaves Shows\nLearn more about your ad choices. Visit megaphone.fm/adchoices