Some opinions on the subject:
Why Is Diesel More Expensive Than Regular Gas?
by: Felix Salmon March 13, 2008
Felix Salmon
Mufson reports on rising gas prices:
Gasoline rose to a nationwide average of $3.246 a gallon for regular unleaded. Diesel, which has been setting records almost daily for the past three weeks, hit a nationwide average of $3.876 yesterday.
Which means that diesel is now 63 cents per gallon more expensive than regular gasoline. I don't have a graph of the diesel-gasoline spread, but I'd guess that's at or near all-time highs; it wasn't so long ago that diesel was
cheaper than gasoline.
Mufson reports that "more and more Americans are driving cars that use diesel because they get better mileage," but that trend is unlikely to stay strong for long if diesel is 20% more expensive than gasoline. The
calculations can get very technical, and involve resale values as well as fuel-economy considerations, but with today's fuel-injection technology it's unlikely you'll find a diesel-powered car which gets 20% better mileage than the equivalent gasoline model.
Why is diesel more expensive than gasoline?
Here's the official answer, from the Energy Information Administration:
Until several years ago, the average price of diesel fuel was usually lower than the average price of gasoline. In some winters when the demand for distillate heating oil was high, the price of diesel fuel rose above the gasoline price. Since September 2004, the price of diesel fuel has been generally higher than the price of regular gasoline all year round for several reasons. Worldwide demand for diesel fuel and other distillate fuel oils has been increasing steadily, with strong demand in China, Europe, and the U.S., putting more pressure on the tight global refining capacity. In the U.S., the transition to low-sulfur diesel fuel has affected diesel fuel production and distribution costs. Also, the Federal excise tax on diesel fuel is 6 cents higher per gallon (24.4 cents per gallon) than the tax on gasoline.
What that means for the diesel-gasoline spread, I have no idea. But don't expect to see the US becoming a Europe-style land of diesel-powered cars any time soon.
http://seekingalpha.com/article/68468-why-is-diesel-more-expensive-than-regular-gas
Inside Story
Smoke and Mirrors: Why Are U.S. Diesel Prices So High?
Date posted: 12-12-2005
STORY TOOLS
With me being a professional automotive journalist and all, Ted Haberkorn figured I was just the man to answer his question.
Ted Haberkorn was mistaken. He should have just asked me about quantum physics in Farsi.
Here's what's on Ted Haberkorn's mind: In his 81 years, Ted has owned, by actual count, 42 vehicles, some of them diesels. Ted likes diesels. He drove a couple of Mercedes-Benz diesels, and right now, he drives a diesel-powered Dodge Ram Quad Cab pickup. Which is cool: When I'm 81, I'll be lucky if I can drive a Rascal.
Anyway, Ted Haberkorn doesn't understand why a gallon of diesel fuel costs more — considerably more — than a gallon of regular gasoline, when not that long ago, diesel was substantially cheaper than regular gas.
How much more? "I've paid 40, 50, even 60 cents more per gallon," he says. "What's going on?" he asks.
I've wondered the same thing. "Lots of people have wondered the same thing," says Allen Schaeffer, executive director of the
Diesel Technology Forum, an information clearinghouse backed mostly by car and truck manufacturers, as well as a fuel company or two.
No easy answer
Unfortunately, Schaeffer says, there is no easy answer. [more]
http://www.edmunds.com/insideline/do/Columns/articleId=108465