Fall in Love in 1.5 Seconds The snappy acceleration of the new Detroit Diesel DD15 will fire a Cascadia up to percent power in just 1.5 seconds. It launches you off the line with up to 50 free horsepower from turbo compounding. Plus up to 5 percent better fuel efficiency than the Series 60. That’s serious savings when you add in Cascadia’s best-in-class aerodynamics. 3AXLE