12: Cylinder Deactivation
With gas prices skyrocketing during the 1980s, the need for cylinder deactivation was a real one. Initially seen on the Cadillac and a few other choice cars, this was a unique technology that would cut off cylinders to the car. Initially, technology was very hard to get right and reliability was questionable at best.
However, cylinder deactivation has been renewed in the last couple of decades. Cylinder deactivation these days has brought about the most fuel-efficient pickup trucks on the road. You’ll find cylinder deactivation technology is most larger displacement vehicles on the market today.