Average gasoline prices are down 23 cents from their peak, the Automobile Club of Southern California reports. But diesel prices have only declined 13 cents.
What’s going on?
We asked two experts — Susanne Garfield, spokeswoman for the California Energy Commission and Tom Kloza, Chief Oil Analyst of the Oil Price Information Service — to explain the diesel conundrum. Here are excerpts of what they told us:
Q: AAA reported in their Daily Gauge Fuel Report that gas prices are decreasing because demand is decreasing. Is this not true for diesel?
Garfield: While gasoline powered vehicles are increasing their fuel efficiency, this isn’t happening in the diesel sector, especially in the heavy duty trucks.
Kloza: Demand for the U.S. is decreasing for all products, diesel included. But the rest of the world’s appetite for diesel has increased. The U.S. has become a large exporter of diesel.
Q: Why have diesel prices been slower to decline than gasoline prices? And why does diesel cost so much more than gasoline when it used to cost less?
Garfield: It all boils down to demand. Demand for diesel has been growing faster than the demand for gasoline California and worldwide. Diesel consumption in freight, transit and off-road uses is expected to continue to grow with population and economic growth.
Kloza: Emerging economies tend to need diesel — to power trains, trucks and electrical generation — before they need gasoline. Plus, many parts of the world prefer diesel to gasoline for their automobiles. Diesel is more expensive to produce than a few years ago, thanks to the removal of nearly all the sulfur. Diesel has fetched $20-$30 a barrel over the price of sweet crude for much of this year and gasoline has barely fetched any margin over crude.
Q: The California Energy Commission Weekly Fuels Watch Report reported that diesel production has risen 24 percent from last year’s amount, but prices are still a lot higher. Where is the diesel fuel all going?Garfield: Again it’s demand and diesel is traded on a world commodity level so it’s shipped to those markets that are paying. California refineries are obligated to fulfill their in-state and out of state contractual agreements however any excess will be sent to where the demand is.
Kloza: We’ve seen a commodities boom in agricultural products. That has meant that there is more demand for the fuel used to plant and harvest these products - diesel transportation demand in the U.S. is almost certainly lower now that the economy is slowing.
Q: Looking ahead to this winter, what do you think will happen to the price of diesel? Will demand for heating oil drive up the price even more?
Garfield: Since fuel oil used for heating in winter months we wouldn’t be surprised to see upward pressure on supplies and higher diesel prices. Several factors can exacerbate or moderate supplies and prices - will temperatures be normal or colder than normal this winter? Earlier winter than normal? Is there enough fuel oil in storage before winter or will it be an earlier and harsher winter that puts upward pressure on prices? How much heating oil is in storage? Are wholesalers or consumers buying in advance? Although Californians don’t use heating oil they way they do on the East Coast or Midwest, higher crude prices will impact diesel prices which impact products and transportation. High crude oil prices now are already making it more challenging for consumers they probably aren’t buying much now in advance for the winter months. People are finding it more difficult to afford just their normal heating oils bills.
Kloza: Prices will be incredibly wild - much will depend on the price of crude, and I suspect that the ultra low sulfur diesel that is the standard for most of the U.S. will continue to fetch a large premium versus crude. I would estimate that U.S. average prices for diesel will range between say $4.50-$5.50/gal., with the higher numbers reserved for California. The one thing you can count on is that chaos, or volatility in the parlance of the traders, will continue. Large ranges and generally bipolar markets - the manic phases have been quite extreme in 2008.
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