On July 16, 2026, a key number that measures how much money oil refiners make hit a record: $69.66 per barrel, up over 2% in a single day. Reuters calls this number, known as the "3-2-1 crack spread," "the most widely used benchmark for U.S. refiner profitability." A crack spread is basically the difference between what refiners pay for crude oil and what they sell the finished gasoline and diesel for. Think of it like a baker's profit margin: the spread between the cost of flour and the price of a loaf of bread.

The record is part of a bigger rally in gasoline prices. CME Group, which runs a major futures exchange, reported on July 14 that the gasoline crack spread was $43 per barrel and that RBOB gasoline (the benchmark U.S. gasoline contract) was up 73% so far this year. The RBOB gasoline price stood at $3.3910 per gallon as of July 17, per MarketWatch.

The 3-2-1 crack spread gets its name from the recipe it models: three barrels of crude oil go in, and two barrels of gasoline plus one barrel of distillate (mostly diesel) come out. Per CME Group, that ratio roughly matches what refineries actually produce. The EIA (the U.S. Energy Information Administration) defines the gasoline crack spread as the difference between the gasoline price at New York Harbor and the price of Brent crude oil from the North Sea.

So what's pushing refiner profits higher? According to EIA data published July 15, oil markets reacted to supply disruptions in the Middle East during the second quarter of 2026. The average gasoline crack spread was up 60% compared to the same period a year earlier. That jump carried into the third quarter.

Before the July 16 record, the EIA's July 7 Short-Term Energy Outlook estimated the gasoline crack spread would rise about 10 cents per gallon on average in Q3 2026. Reuters attributed the record close to fuel shortage concerns.

The bigger picture here is that refiner profits are running well ahead of what government forecasters expected. The 73% year-to-date rise in gasoline prices reported by CME Group is much steeper than the 60% year-over-year increase the EIA reported for Q2. That gap fits a pattern where finished fuel prices climb faster than the crude oil they're made from during a supply squeeze. The EIA's July 7 estimate of a 10-cent per gallon increase now looks low compared to what the market actually did on July 16.

What is known is the data as of July 16. What is priced in — meaning what investors are already betting on — is further fuel tightness. What remains uncertain is whether Q3 refining margins come back down toward the EIA's estimate or keep climbing.

CME Group published RBOB Gasoline Futures settlement data for July 15, 2026, consistent with the figures cited above. The EIA's October 2025 note on how it defines the gasoline crack spread remains the agency's authoritative source for the metric.