Over the past four to five years, a lot has been written about the shift away from big-bore 15-liter engines to medium-bore (11-liter to 13-liter) engines. This was particularly true among truckers looking to minimize fuel costs.
New data shows that many of the industry's trend-setters have discovered the truth in the old saying, "there's no replacement for displacement." They've come to understand the benefits of new technology in the big-bore engines, and have been making the switch because it saves them money. The comeback has been dramatic.