Well, that's the US, where diesels typically require extra aftertreatment and diesel fuel is more expensive.
And it likely doesn't include the extra cost of emergency maintenance, such as injector or pump repair.
Originally Posted by Xist
Particulates? Including sulfur? But they use low-sulfur diesel!
I think soot is the issue. Critics of particulate regulations is that regulating larger particulates forces manufacturers to build engines that release ultra-fine particulates... which is infinitely worse for your health (just as microscopic ash particles are the most dangerous emissions from volcanic explosions)...
Of course, I'm in favor of diesel, as the less you burn, the less you do emit, overall.