I have searched past forums and have found similar topics but not one solid thread that answers the classic question. In the long run, say over the course of 5 years what kinds of truck is cheaper to maintain and run, a gas truck or a diesel truck. The factors I am considering in trying to make this determination are the fact that in CT diesel is more expensive than gas, diesel trucks get better gas mileage, in the short term the PM on diesel trucks is more expensive, but diesel trucks last longer. Also diesel trucks command a higher resale value but initially they can cost up to 7K more. I am working on a business plan for obtaining funds to expand my business and purchase another truck. I need some hard data to put into the plan regarding why I am choosing the engine that I am on my new truck. If it does turn out the diesel is more (I will admit I would prefer a diesel) I need to be able to justify the added expense with some good reasoning.