I was a bit concerned going from a 7.3 diesel van to my 5.4 van. I'm so glad that I did. So much cheaper for parts, oil changes, no fuel additives needed in the winter, no need to plug it in, just so much better all around. Sure, fuel mileage is less, but so is the cost of gasoline. Today's gas engines last just as long as a diesel engine, with proper maintenance. And how much cheaper is a gas engine versus a diesel on a dealer order form, granted a diesel engine van brings better resale value. I'll never go back to a diesel knowing the difference now.