Some manufacturers swear by “V” cylinder configurations, and their loyalists follow suit; others, however, stake their claim on inline engines. Former Caterpillar engineer and longtime semi truck dealer Jim Coles is a red-blooded believer in the inline-six. It was internally referenced as the VITEL, standing for “vehicle industrial truck engine line.” “Caterpillar and everyone else did go into V-type engines,” Coles pointed out, mentioning the 90-degree RM180 and the 3408. Why the Inline-Six Won | Former Caterpillar Engineer Jim ColesGot a tip or question for the author?