What would a supply and demand graph look like for this article including an equilibrium

Oil prices have risen. That's making gas more expensive for US drivers and helping Russia's warSaudi Arabia cut back how much it sends to global markets, pushing prices upBy David McHugh | The Associated PressPublished September 25, 2023 Stanislav Krasilnikov | TASS via Getty Images

Oil tanks at an oil processing facility of Saudi Aramco, a Saudi Arabian state-owned oil and gas company, at the Abqaiq oil field.

Oil prices have risen, meaning drivers are paying more for gasoline and truckers and farmers more for diesel.

The increase also complicates the global fight against inflation and feedsRussia's war chest. That poses problems for politicians as well as the people having to spend more to get to work, transport the world's goods or harvest fields.

Here are things to know about the recent increase and where prices might be going:

Above all, Saudi Arabia's decision to cut back how much oil it sends to global markets has pushed prices higher.

The world's second-largest oil supplier has slashed production by 1 million barrels a day since July and decided this month to extend the cut through the end of the year.

Russia, Saudi Arabia's ally in the OPEC+ oil producers' coalition, also extended its own cut of 300,000 barrels a month through 2023.

Simply, tighter supply means higher prices.

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A big question is demand for fuel, which is picking up along with rebounding travel following the depths of the COVID-19 pandemic. A robust U.S. economy increases demand for oil and the price while weak growth in China and Europe has the opposite effect.

"We see the upside potential for the oil price as being virtually used up and if anything envisage setback potential in view of the weak economy," said Thu Lan Nguyen, Commerzbank head of commodities research who foresees oil at $85 per barrel by year's end. "The oil price is only likely to climb more lastingly once the economic outlook begins to brighten, which should be the case next year."

Another factor is financial speculation, and it appears investors are piling into the oil market with bets that prices will rise.

"Much of the price surge beyond $85 per barrel is due to a flood of speculative money, while fundamentally there is still plenty of oil in the world to meet demand for now," said Gary Peach, oil markets analyst at Energy Intelligence.

Plus, more Iranian oil may come on the market as the U.S. "turns a blind eye" on enforcing sanctions to keep prices from rising further, Leon said. That could add 200,000 to 300,000 barrels a day.

Costlier oil feeds through to higher prices for gasoline and diesel, especially in the U.S., where roughly half the pump price reflects the cost of crude the rest is marketing, taxes and other costs.

Crude is a smaller share of gasoline and diesel prices in Europe because fuel taxes are much higher there.

Average U.S. pump prices are still well below the record $5 per gallon seen in summer 2022. But at $3.85 per gallon, they're still up 15 cents from a year ago. Oil costs are keeping gas prices high even as driving demand drops with the end of summer vacations and plentiful gasoline stocks, according to auto club AAA.

Diesel prices have risen as well, along with higher oil costs and refineries facing shortages of the specific kinds of crude best for making diesel. Refineries also are choosing to produce jet fuel instead, chasing profits as air travel rebounds. A gallon of diesel cost $4.58 last week, up from $4.34 a month ago.

That hurts farmers, who use a lot of diesel, and adds to the price of consumer goods transported by truck, which is pretty much everything.

Diesel supplies got even tighter Friday after Russia said it would halt the export of refined oil products to hold down fuel prices at home.

Oil is Russia's main moneymaker, so higher prices help the Kremlin pay for its invasion of Ukraine and weather sweeping Western sanctions aimed at crushing its wartime economy.

The recent rise in oil prices, along with a cutback in the discount that sanctions forced Russia to offer Asian customers, means Moscow will earn "significantly more revenue from those exports," said Benjamin Hilgenstock, senior economist at the Kyiv School of Economics.

The additional revenue could reach an estimated $17 billion this year and $33 billion next year, he said in an online talk hosted by the Brussels-based European Policy Center.

Russia has lost some $100 billion in oil revenue following a European Union import ban and a $60-per-barrel price cap imposed by the Group of Seven major economies, which bars Western insurers and shippers from handling oil priced above that level.

Russia, however, has increasingly found ways around the cap, including using a fleet of ghost tankers masking their ownership and origin of the crude they carry.

Any additional export earnings help support Russia's currency and what it can import including weapons components.

U.S. President Joe Biden has faced criticism from Republican lawmakers to encourage more oil drilling and scrap his support for electric vehicles.

But that criticism largely overlooks the rise in U.S. oil production over the past year. The U.S. Energy Information Administration reported that oil production averaged 12.8 million barrels a day in June, up 1 million barrels from 12 months ago, close to the levels achieved before the pandemic began in 2020.

Biden has said he considers oil production essential to keep the economy going as a bridge to a future with EVs and renewable energy.

Still, the White House views the oil market worldwide as being undersupplied, in line with recent OPEC data that indicates there will likely be a worldwide shortfall of 3 million barrels a day. The administration is also in touch with domestic and international producers on longtime supply needs, trying to ensure that the risk of higher oil prices does not disrupt economic growth.