Why Everyone Is Talking About High Diesel Prices

23 Sep 2026 · 17 min · 7 chapters

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In short

Record-high diesel prices (about $6.50/gal) and how they ripple through the U.S. economy and midterm politics, amid war-related supply constraints and potential policy responses like a 90-day diesel export ban.

Guests

Mark Nikhet, Bloomberg National Economics reporter. Interviewed via host Sarah Holder.

Guest background

Covers national economics for Bloomberg News; reports on diesel price drivers and voter impacts.

Key claims

Diesel prices are driven by reduced Russian diesel exports (Russia bans exports; Russia previously supplied ~10% of global diesel) plus constrained Middle East shipping/refining tied to the Iran war. Diesel is costlier than gasoline due to refining/environmental standards and higher demand. Experts say diesel wouldn’t be at record levels without Iran-war constraints.

Notable examples

Rob Gudgel’s Washington charter fishing trip fuel costs rising from ~$600 to near $1,000; Iowa farmers holding off on diesel but needing it for harvest; Maine/Alaska home heating oil and fishing industries affecting Senate races.

Written by AI. May contain mistakes. Listen to the episode to check what was said.

Chapters

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Introduction to ChatGPT Work

0:00 to 0:35

Learn about ChatGPT Work and its capabilities for productivity.

“Some people treat ChatGPT like some kind of smart search engine, and some use it to get work done.”

Introduction to ChatGPT Work

1:12 to 1:45

Learn about ChatGPT Work and its capabilities for productivity.

“But sometimes what matters most is being ready for what you never saw coming.”

The Impact of Diesel Prices on the Economy

1:52 to 4:12

Understand how high diesel prices affect various industries and the upcoming elections.

“The expectation is a lot of pain is still ahead, that this is not a short-term situation, particularly if we don't see a quick resolution to the war in Iran.”

Factors Driving Up Diesel Prices

4:12 to 7:16

Explore the geopolitical factors contributing to the rise in diesel prices.

“Today on the show, Bloomberg National Economics reporter Mark Nikhet on how record high diesel prices affect everyone in the global economy and the impact they could have on the U.S.”

Political Implications of Diesel Prices

7:16 to 10:54

Discuss the political ramifications of rising diesel costs in battleground states.

“So, you know, when the price of diesel goes up, the price of home heating oil goes up.”

Debate on Diesel Export Ban

12:28 to 14:00

Analyze the arguments for and against a potential U.S. diesel export ban.

“I've said let's not send out the diesel.”

Impact of Diesel Prices on Farmers and Voters

14:00 to 21:43

Explore how high diesel prices affect farmers' profitability and voter sentiments in the U.S.

“more diesel and would not be able to produce as much diesel, could drive up the prices in that way.”
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Transcript

Automatic transcript. May contain errors.

0:00Some people treat ChatGPT like some kind of smart search engine, and some use it to get work done. ChatGPT Work is a new way of working in ChatGPT that can take action across your apps and files, stay with a project for hours if needed, and turn a goal into finished work. It's designed to help you move from a chaotic starting point to a reviewable first version. So all the source materials, briefs, and scattered information that you have to grind through to turn into something useful can just become something useful. Put ChatGPT to work on your most ambitious ideas and projects. Get started at ChatGPT.com by selecting Work Mode, available on Plus and Pro plans.

0:42This is Robert Smith from Business History. If you're listening to this, there's a good chance you're a small business owner. And like every small business owner, you started with a dream to do what you love and watch it grow. What you probably didn't dream about? Keeping up with cyber threats. That's where MasterCard can help with access to tools that help identify cyber threats to better protect your business. Building your dream business? Priceless. For cybersecurity in a changing world, there's MasterCard. Learn more at MasterCard.com slash small business. If you listen to financial news, you know a lot of time is spent thinking about what's next.

1:17The next opportunity. The next investment. The next move. But sometimes what matters most is being ready for what you never saw coming. For more than 75 years, Cincinnati Insurance has worked with independent agents to help protect businesses, homes, valuables, and more. Because planning for the future isn't only about knowing what's next. It's about making sure you're ready for what you can't predict. Let Cincinnati insurance make your bad day better. Find an independent agent at CINFIN.com. Bloomberg Audio Studios. Podcasts. Radio. News. The expectation is a lot of pain is still ahead, that this is not a short-term situation, particularly if we don't see a quick resolution to the war in Iran.

2:07This week, diesel prices hit$6.50 a gallon. That's a record high. Today, Politico reported that, in an effort to push prices back down, the Trump administration is preparing a plan for a 90-day ban on diesel exports. Diesel touches all aspects of the U.S. economy. So when the price of diesel goes up, it just affects all aspects of pricing in the U.S. The high price of diesel is starting to affect all kinds of industries, from farming to shipping to tourism. There it is! Fish on! We got him starboard side! Starboard! Because diesel powers tractors, trucks, home heaters, and fishing boats.

2:57Rob Gudgel captains a 43-foot charter boat in Washington state. He takes passengers out on fishing expeditions into the Pacific. Fuel is one of the number one costs that we have to endure. The other day, fuel jumped up 85 cents a gallon. For a 130-mile trip, Rob's twin engines burn about 130 gallons of diesel. I was paying around$600 for a trip. And now... It's close to$1 ,000. Not quite$1 ,000, but it's darn close. We try to eat some of it because everybody's going through a tough time. Cost of fuel drives the economy. It doesn't matter if you're going to the grocery store, the clothes you buy.

3:37It's plane, trains, ships, whatever it is. That's what drives the economy is the cost of fuel. And with the midterms coming up, the cost of fuel is also driving politics. Voters are inclined to blame President Trump and Republicans who are in control and power right now for high diesel prices. while they have seen price spikes in the past, they do not think that diesel or home heating oil would be at record levels if not for the Iran war.

4:11I'm Sarah Holder, and this is The Big Take from Bloomberg News. Today on the show, Bloomberg National Economics reporter Mark Nikhet on how record high diesel prices affect everyone in the global economy and the impact they could have on the U.S. midterms.

4:31So, Mark, help us understand, what's been driving up the cost of diesel? Why has it been rising faster than the cost of gasoline? Well, there's a confluence events for increasing diesel prices. We've had Ukrainian attacks on Russia refining of diesel, and Russia has also banned exports of diesel. And Russia supplied previously about 10 % of the world's supply of diesel. So we've had declining exports from Russia. But it's happening at the same time that we've seen the shipments of diesel and refining of diesel in the Middle East constrained because of the Iran war. So sort of the combination of those two things has really driven up the price of diesel.

5:17And diesel is more expensive than gasoline because it costs more to refine diesel because of environmental standards. And the global demand for diesel is higher. So the price of diesel attracts higher than gasoline typically. And you're describing some compounding factors that have led to the rise in the price of diesel. President Donald Trump, for his part, has said that, quote, the world's diesel price rise is mostly caused by the Russia-Ukraine war, not Iran. That was in a Truth Social post earlier this month. Is it possible to tease out how much impact the war in Iran may be having versus something like the Russian export ban?

5:55What are you hearing from the experts you're talking to about how to weight these various causes? It's hard to tease out, you know, exactly how much of the increase would come from the Iran war versus, you know, the Russian export reduction. I mean, the administration wants to blame this all on, you know, Russian refining capacity being affected by the Russia-Ukraine war and also, you know, reduced refining capacity in the U.S. under previous Democratic presidents. But the experts we talk to say, you know, diesel would not be at record prices if not for the Iran war and the constraints on shipping in the Middle East.

6:35When most people fill up at a gas station, they're not choosing diesel to put into their car, for example. But the cost of diesel has this huge, far-reaching, sort of rippling economic impact for people. Why is it so important? And what does it touch? Diesel powers the trucks that we use to deliver products across the country. Diesel powers the tractors that farmers use to plant and harvest their crops and also deliver their crops to silos and grain elevators. And diesel and its close derivative, home heating oil, you know, heats homes and businesses, particularly in the Northeast U.S. and Alaska and rural areas.

7:20So, you know, when the price of diesel goes up, the price of home heating oil goes up. And that means, you know, heating bills go up for homeowners and businesses that rely on home heating oil for their heat. We're just over 40 days away from the midterm elections here in the U.S. You've dug into how diesel and diesel prices factor into these races. Take us around the map of battleground states. What did you find? Well, let's start with farming because the price of diesel has a huge impact on agriculture, particularly now because we're heading into harvest season. So farmers have no choice but to buy diesel to power their combines to get in the harvest.

8:03So the farm states that have tossed up Senate races right now include Iowa and Nebraska and Kansas. And the issue of, you know, high diesel prices are paramount in those Senate races because of how important agriculture is to those states' economies. And it's also very impactful in Maine and Alaska right now, mostly because of the price of home heating oil reaching record levels. In fact, the price in Maine last week was just posted to be 74 % higher than this time last year, right at the time that a lot of homeowners are filling up their fuel tanks for the winter. And we're being told that some customers are holding off on filling up their tanks, hoping that the price will come down.

8:52But, you know, winter's coming and they're not going to be able to hold off forever and have to bite the bullet to pay the higher cost for home heating oil. Another area is Alaska and Maine fishing because diesel powers the boats that the fishing industry needs. The Democratic candidate in Alaska, Mary Patola, has cited the impact of diesel costs on the fishing industry. Every day, that diesel is getting more and more expensive for our fishermen, more and more expensive to make ice, more and more expensive for our processors. We need a break here. We need some help. We need somebody in D.C. fighting to lower our costs, not to jack up our costs.

9:36And we're seeing this anywhere where, you know, fishing is a big part of the state economy. And this is having a big impact on the Senate races in Maine and Alaska in particular because they're both toss up races. And the candidates are talking about the price of home heating oil and diesel in those states and blaming the Republicans who control Congress and the White House right now for creating the circumstances that are pushing up the price of diesel and home heating oil. The fix that candidates, members of Congress, and President Trump is calling for, and whether it could work. That's after the break.

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12:38I've said let's not send out the diesel. We make a lot of diesel. Speaking at the United Nations this week, President Trump said his administration was considering a diesel export ban. And today, Politico reported new details on the plan the White House is developing, which, if imposed, would ban U.S. diesel exports for 90 days. The idea has been floated by some U.S. lawmakers and midterm candidates who hope that keeping U.S. diesel for domestic consumption might lower its cost. But it's also gotten a lot of pushback from the oil and gas industry and from some energy analysts and experts who warn an export ban wouldn't actually bring prices down and could even backfire.

13:20Well, I think you're seeing it primarily right now in Iowa. Just yesterday, the Republican candidate for the Senate there, Representative Ashley Hinson, came right out and called for a ban on exports of diesel. And the Republican senator in Iowa, Chuck Grassley, has also called for an export ban. And it's a little controversial because the industry does not think that a export ban would be beneficial. In fact, they think the opposite, that an export ban could actually help drive up the price even more because banning exports would mean, you know, the refiners would have to store more diesel and would not be able to produce as much diesel, could drive up the prices in that way.

14:07But like I said, in Iowa, you're seeing the Republican candidates even come out against the the war in Iran as a primary cause of or a factor in the rising price of diesel. But, you know, the Democratic candidates are also calling for an export ban and blaming the president in particular for the rising cost of diesel. So if you see this kind of happening in a Republican leaning state like Iowa, it just sort of gives you an idea of how salient the issue is in that campaign if the Republican candidates feel the need to address it in this way. And Mark, you've been doing a lot of reporting, talking to voters about their concerns.

14:46What do we know about how prominent the cost of diesel is for these voters who are deciding to go to the polls or stay home or vote for a particular candidate? And what are you hearing from them about how this is affecting them? It's very prominent for farmers in particular. I mean, this is a constituency that, you know, generally supports Republicans in Donald Trump, certainly voted for him in his elections and are inclined to support Republican candidates in the Senate races. but they're sort of up against it now when it comes to high diesel prices because it's a cost that they can't mitigate.

15:23They can't, you know, not harvest their crops. So they have to pay the high cost of diesel. I've talked to a farmer in Iowa who said he, you know, leans Republican. He gravitates toward Republican politics and he's been holding off buying diesel just hoping that the price would come down. And, you know, he's at the point now where there's nothing he can do about, you know, mitigating the high price of diesel and he has to do his harvest. And the problem is that just cuts right into the bottom line. It's not like his farm operates at a high profit margin. So when you introduce higher costs on that side of the equation without the ability to really mitigate those higher costs, that just means less profits for him in this harvest.

16:11Who or what does he hold responsible for these higher diesel costs? He blames President Trump and the war in Iran. I mean, his view is the, you know, the price of diesel might be higher because of market forces right now, but it certainly would not be at record levels if not for the war in Iran. We also talked to a voter in Maine who is dealing with high home heating oil prices right now. They're not exactly the same, but it's essentially the same product refined from crude oil. And he's frustrated because this is the time of year he normally fills up his fuel tanks. And he generally buys like 150 gallons a month through the course of the winter heating season.

16:53But he's looking at cost or he's calculating at current prices an additional$300 a month for home heating oil. And he just can't afford that. That means having to dip into his savings to pay that or putting off repairs on his farmhouse. He's a 75-year-old retiree, and he blames the Republicans for this. He correlates this with the war in Iran. And if the U.S. had not attacked Iran and affected the Middle East refining capacity and shipping, he would not be seeing as high of home heating oil prices this winter. So, Mark, we've talked about a few of the proposals to address this issue. export bans being one of them.

17:35Talk me through what other mechanisms are available to bring the cost of diesel down. What can be done about this? The problem is not a lot. You know, it's sort of a supply and demand situation. French President Emmanuel Macron is called on the European Commission to, you know, relax rules on oil products like diesel and kerosene, You know, saying the EU should, you know, examine relaxing the rules, recovering fuel quality, the idea that, you know, we could produce more diesel for the global economy. You know, but as I said, the problem is we still have Russia setting to extend a diesel export ban beyond September.

18:27So if we have no more Russian oil coming onto the Russian diesel, I should say, coming onto the market, you know, changing the refining rules in Europe is not going to affect the global supply situation. So there isn't enough in reserve collectively globally to ease these shortages? Right. We're at a time when global supplies and stocks of diesel are depleted for all intents and purposes with no real significant additional supply coming onto the market. And what has the Trump administration and what have members of Congress sort of proposed here? Is there a plan in the U.S. to tackle this? Well, there's talk of trying to increase the, you know, refining capacity for U.S.

19:15refiners. You know, there's talk about, you know, trying to ban exports on the gasoline side, you know, do like a gas tax holiday to, you know, don't charge the gasoline tax for a period to bring down the price for consumers. You know, part of the reason that diesel is more expensive generally than gasoline is taxes are higher on diesel than gasoline. But these things all, you know, the experts think would have a dramatic effect on prices given the supply constraints we have right now in the market. I feel like I always ask this when we have a conversation about high gas prices, high diesel prices.

19:55But are there alternatives that people in industries can turn to? Might this spur more investment in green energy infrastructure? Is this a sign that the reliance on diesel is unsustainable? Perhaps. I mean, you're seeing reports that there's more interest in electric vehicles, but that's sort of on the gasoline side. And the problem is, it's not like there's a lot of alternatives for diesel, particularly in the commercial sector. I mean, there's different blends that can perhaps be refined for diesel. But at the end of the day, a lot of these businesses in particular have no choice in farmers but to buy the diesel at whatever price it is at.

20:47This is The Big Take from Bloomberg News. I'm Sarah Holder. To get more from The Big Take and unlimited access to all of Bloomberg.com, subscribe today at Bloomberg.com slash podcast offer. If you like this episode, make sure to subscribe and review The Big Take wherever you listen to podcasts. It helps people find the show. Thanks for listening. We'll be back tomorrow.

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22:27Learn more at MasterCard.com slash smallbusiness.

From the publisher

Diesel prices are hitting new highs, and voters aren’t happy. With the midterms approaching, the Trump administration is trying to find ways to curb fuel costs, including a potential US diesel export ban.

On today’s Big Take podcast: The political fallout of sky-high diesel prices. Bloomberg national economics reporter Mark Niquette and host Sarah Holder break down what’s driving up costs, why prices are hitting battleground states particularly hard and whether an export ban could backfire.

Read more: Record Diesel Prices Hit at Worst Time in Key Battleground States

We have a special Bloomberg subscription offer for podcast listeners at Bloomberg.com/podcastoffer.

Hosted by Sarah Holder; Produced by David Fox; Reported by Mark Niquette Edited by Tracey Samuelson; Engineering by Alex Sugiura

See omnystudio.com/listener for privacy information.

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