Pump Before Policy: Why Petroleum Distillate Prices Drive Near-Term Inflation More Powerfully Than Interest Rates

Analytical Policy Brief

Author: Dennis M. Dodo – Aiden Consulting

Abstract

This paper argues that the price of petroleum distillates (diesel and gasoline) exerts a more powerful, direct, and immediate influence on near-term consumer price inflation than changes in central bank interest rates. A critical distinction frames this argument: distillate shocks and monetary policy operate on fundamentally different time horizons. While central banks are the appropriate instrument for anchoring long-run inflation expectations and combating entrenched, demand-driven price growth, they are poorly suited to counteract the immediate cost-push shocks that energy prices deliver. Distillate prices affect the economy through three primary channels: as a direct component of the consumer price index, as a fundamental input cost passed through the transportation of nearly all goods, and as a price-setter for other energy utilities. The paper also demonstrates that these shocks, while sometimes transitory in origin, are rendered structurally persistent by asymmetric price transmission, the well-documented “rockets and feathers” effect, meaning that near-term relief rarely matches the pace of the initial spike. For policymakers, business leaders, and investors focused on the inflation outlook over the next three to twelve months, tracking the diesel crack spread and refinery utilization rates is more actionable than parsing central bank minutes.

Introduction

In the spring of 2022, a peculiar economic phenomenon unfolded. After months of relentless increases, the price of crude oil began to moderate, yet the price at the pump in the United States surged to an all-time high. Consumers felt the pinch immediately. Not just when filling their tanks, but on subsequent trips to the grocery store, where the cost of nearly everything had crept upward. This real-world event serves as a powerful introduction to a critical and often misunderstood debate in modern macroeconomics: what truly drives the inflation we feel in our daily lives, and over what time horizon?

The traditional central bank view, rooted in monetarist thought, holds that inflation is ultimately a monetary phenomenon, best controlled by adjusting interest rates to moderate aggregate demand. This framework is not wrong, but it is time-conditional. It describes the long run. The central bank’s primary tool works through long, variable, and predictable lags, making it effective at shaping inflation over a horizon of one to three years, but far less useful for explaining or responding to the sharp, near-term price shocks that consumers experience most acutely.

This paper argues that for the near-term inflation outlook (specifically, three to twelve months), fluctuations in the price of petroleum distillates, particularly diesel and gasoline, are a more immediate and powerful driver than changes in interest rates. Their impact is not merely direct, but is amplified through transportation networks and energy markets, creating a cost-push dynamic that monetary policy is structurally ill-equipped to counteract swiftly. The paper will first deconstruct the price composition of distillates to show why they are not a simple mirror of crude oil. It will then analyze their direct and indirect inflationary pathways, drawing on a range of empirical evidence. Next, it will engage seriously with the strongest counterargument, namely that energy shocks are transitory and therefore not a structural inflation problem, before demonstrating why asymmetric price transmission makes this rebuttal insufficient. Finally, it contrasts the speed and mechanism of distillate shocks with that of interest rate policy.

Section 1: Deconstructing the Pump Price: Beyond the Price of Crude

A fundamental premise of this paper’s argument is that the price of gasoline and diesel is not simply a mirror of crude oil prices. This decoupling is critical to understanding why distillate-specific shocks matter independently of broader commodity markets. The missing link is the refining process, and its cost is captured in a metric known as the “crack spread.”

The crack spread represents the difference between the price of crude oil and the refined products derived from it, like gasoline and diesel. It is, in essence, the refiner’s profit margin and compensation for the cost of processing. This spread is not static; it fluctuates based on the supply and demand for refining capacity itself. While crude oil accounts for the largest share of what consumers pay at the pump under normal conditions, the refining component is highly volatile and can become the dominant pricing factor during periods of capacity tightness.

This tightness became acutely apparent in 2022. After decades of underinvestment and the pandemic-induced shutdown of several facilities, global refining capacity was constrained. In the U.S., refinery capacity peaked in 2020 and subsequently dropped by around one million barrels per day as plants were either shut down or retooled. This supply crunch meant that even as crude prices fell, the lack of facilities to process that crude into gasoline and diesel caused crack spreads to blow out. Normally ranging from $10 to $20 per barrel, the 3-2-1 crack spread (a measure of profit from refining three barrels of oil into two of gasoline and one of diesel) surged to nearly $60 per barrel in mid-2022. In practical terms, the cost of refining itself added a record ~$55 to the price of a barrel, making gasoline more expensive even as underlying crude got cheaper.

This phenomenon underscores a key point of non-linearity. Any disruption in the supply chain, whether a refinery outage, a shift in seasonal gasoline blends, or a structural lack of capacity, can spike retail prices independently of the global crude market, creating an inflationary shock that originates not in the oil field, but in the industrial heart of the energy economy.

Section 2: The Direct and Indirect Inflationary Pathways of Distillates

The reason a spike in distillate prices is so economically potent is the multi-faceted way it permeates the broader economy. Its impact is felt both directly by consumers and indirectly through the cost structure of nearly all goods and services.

A. The Direct Impact: The CPI Basket

“Gasoline” and “fuel oil” are explicit line items in the consumer price index (CPI) basket across most developed economies. When their prices rise, the monthly inflation reading ticks up immediately and visibly. This creates a powerful psychological effect: consumers are confronted with the rising cost of a necessity on a weekly basis, shaping near-term inflation expectations in ways that a 25-basis-point rate decision never could.

B. The Indirect Impact: Cost Pass-Through Across the Economy

The far more pervasive impact is indirect. Diesel is the lifeblood of physical commerce. It powers the trucks that deliver food to grocery stores, the trains that move raw materials, and the ships that transport finished goods across oceans. An increase in the price of diesel is therefore a direct increase in the marginal cost of getting almost any physical product to market. It functions as a universal surcharge on the real economy.

The empirical evidence for this pass-through is robust and extends well beyond any single commodity. A 2021 IMF Working Paper examining fuel price pass-through across 109 developing countries found that domestic retail fuel prices respond strongly and rapidly to international price increases, with the transmission of upstream costs to consumer prices occurring within one to two months. In the United States, the relationship is similarly well-documented: Bureau of Labor Statistics data consistently shows that CPI sub-categories for food at home, transportation services, and household energy move in close correlation with diesel price indices on a one-to-three-month lag. A more granular study focused on the California grocery market found that diesel price surges contributed to a peak transmission effect of a 23% increase in private-label milk prices, illustrative of a dynamic that operates across the entire food supply chain, not merely one product in one state.

Why This Matters for a Policy Audience

When diesel prices rise 20%, it is not just drivers who pay more. Every pallet of groceries, every Amazon delivery, every hospital supply shipment absorbs that cost. Companies pass it through, or they absorb it into margins. Either way, it registers in prices or in earnings. Either way, the effect arrives within weeks, not years.

This dynamic is further entrenched by market structure. Research into the UK’s road fuels supply chain has found evidence of asymmetric price transmission (APT), known as the so-called “rockets and feathers” effect, where retail prices rise far more quickly in response to wholesale cost increases than they fall when those costs decline. A study of the Polish fuel market from 2007 to 2024 quantified this asymmetry precisely, finding that retail diesel prices rise 2.91 times faster when wholesale prices increase than they fall when wholesale prices decrease. This is not an anomaly; it reflects rational, profit-maximizing behavior by firms with pricing power. The consequence for inflation is significant: even after the initial supply shock subsides, consumers continue to pay elevated prices for an extended period, giving what might be a “transitory” supply disruption a structurally persistent inflationary tail.

Finally, distillate prices influence other energy utilities. In many regions, home heating oil is a direct distillate product. In some power grids, oil-linked natural gas contracts act as marginal fuel sources for electricity generation. A spike in distillate prices can therefore compound through electricity and heating costs simultaneously, creating a broad-based energy burden that affects households and businesses across multiple budget lines at once.

Section 3: Engaging the Counterargument: Are Energy Shocks Just Transitory?

The most serious intellectual challenge to this paper’s thesis is the “transitory” argument, and it deserves a direct response. The counterargument runs as follows: petroleum distillate prices are volatile precisely because they are driven by supply disruptions (refinery outages, geopolitical events, seasonal blends) that resolve themselves over time. Crude markets mean-revert. Crack spreads normalize. By contrast, entrenched inflation, the kind that the Federal Reserve is institutionally mandated to fight, is a wage-price spiral phenomenon. It occurs when workers, expecting sustained price increases, demand higher wages, which raises business costs, which raises prices further, in a self-reinforcing loop. Central bank interest rate policy is specifically designed to break this spiral by cooling demand and re-anchoring expectations. On this reading, energy shocks are noise; monetary policy addresses signal.

This is a coherent and partially correct argument. It is true that crude oil prices have historically mean-reverted over multi-year cycles, and it is true that the primary risk of a durable wage-price spiral requires monetary intervention that distillate market dynamics alone cannot provide. The paper does not dispute that central banks are the right instrument for combating entrenched, expectation-driven inflation over a two-to-five year horizon.

However, the counterargument fails on three grounds when applied to the near-term inflation question this paper is addressing.

Three Reasons the “Transitory” Argument Falls Short in the Near Term

1. Asymmetric transmission means the consumer rarely gets the full benefit of mean-reversion on the way down. A spike that takes three months to build may take twelve to unwind at the retail level, due to the rockets-and-feathers effect documented above.  2. The 2022 episode demonstrated that structural capacity constraints, not just cyclical disruptions, can sustain elevated crack spreads for extended periods. When refinery capacity is permanently retired, mean-reversion is slower and less complete.  3. Near-term inflation expectations are formed by what consumers observe daily at the pump and weekly at the grocery store. Even if energy shocks are ultimately transitory in a macroeconomic sense, they can de-anchor short-run expectations in ways that complicate the central bank’s own job, making the “energy is just noise” framing operationally dangerous for policymakers.

In short, the transitory framing is most useful when evaluating whether a central bank should adjust its long-run policy stance in response to an energy shock. It is least useful when a policymaker, CFO, or investor needs to know what inflation will look like in the next quarter.

Section 4: A Tale of Two Shocks: Distillate Price Spike vs. Interest Rate Hike

With the counterargument addressed, the core comparative analysis comes into sharper focus. A distillate price shock and a monetary policy shock are fundamentally different instruments operating on fundamentally different timescales. The table below contrasts their key characteristics.

Table 1: Contrasting the Mechanisms of Distillate Price and Interest Rate Shocks

Feature	Petroleum Distillate Price Shock	Central Bank Interest Rate Hike
Primary Mechanism	Cost-Push: Increases the cost of production, distribution, and transportation for all goods and services.	Demand-Pull: Aims to cool inflation by making borrowing more expensive, reducing consumer and business spending.
Transmission Speed	Direct and Immediate: Affects CPI in the current month; propagates through supply chains within weeks.	Indirect with Long & Variable Lags: Takes 12–24+ months to ripple through mortgages, business loans, and investment decisions.
Pervasiveness	Systemic: Impacts nearly every sector simultaneously via transport and energy costs, affecting all households and businesses.	Targeted: Initially hits interest-rate-sensitive sectors (housing, construction, autos). Effect on services and wages is slower and diffuse.
Impact on Output	Contractionary: Acts as a tax on consumers and businesses, reducing real disposable income and profit margins.	Contractionary by Design: Deliberately slows growth to reduce demand, with inherent risk of tipping into recession.

A distillate price shock hits the economy’s supply side directly. Its transmission is not only immediate but, as documented above, asymmetric: price increases are passed on to consumers far more readily than decreases. This creates a one-two punch. The initial surge worsens inflation; the rockets-and-feathers effect prevents those gains from being fully reversed when cost pressure subsides. The net result is that even a “transitory” energy shock leaves a lasting inflationary residue in consumer prices.

An interest rate hike, by contrast, is a demand-side tool. It works by making borrowing more expensive for households and businesses, which reduces mortgage originations, dampens capital expenditure, and eventually cools wage growth. The mechanism is indirect and operates through what Milton Friedman famously called “long and variable lags.” Empirical research confirms that the average lag for full monetary policy transmission is approximately 2.5 years. Research from the Reserve Bank of New Zealand further cautions that uncertainty about the exact length of this lag creates its own policy risk: underestimating it leads to responses that are too weak, while overestimating it can produce excessive tightening. The practical upshot is that by the time a rate hike begins to cool the housing market, the economy may have already been battered by, and partially recovered from, a completely unrelated spike in diesel prices.

Section 5: Non-Linearity and Structural Complexity

A final dimension reinforces the paper’s argument: the price of distillates is structurally more complex, and therefore more unpredictable, than the policy interest rate. This complexity means that distillate-driven inflation is difficult to anticipate using standard macroeconomic models that treat energy as a simple input.

The price of distillates is a function of crude oil plus refining capacity, plus distribution margins, plus taxes and blending requirements. Refinery maintenance schedules, unplanned outages due to extreme weather, changes in seasonal gasoline blends, and even the long-run trajectory of the energy transition can all distort crack spreads independently of global crude supply. For example, the structural shift toward electric vehicles may reduce long-term gasoline demand, but it does not immediately eliminate the need for diesel in freight or naphtha in petrochemicals. This creates a potential mismatch in refinery configurations, where facilities optimized for gasoline production become progressively less economic, reducing investment and quietly eroding the capacity buffer that keeps crack spreads in check.

This complexity makes distillate prices a far more volatile and non-linear input to near-term inflation than the slow-moving lever of the policy interest rate. A hurricane shutting down refineries on the U.S. Gulf Coast can cause a national spike in gasoline prices within days. Such an event is entirely exogenous to the global crude market, the stance of monetary policy, and any standard macroeconomic forecast. No central bank meeting can preempt it; no rate decision can undo it within a timeframe that matters to households paying that month’s bills.

Conclusion

This paper has argued that petroleum distillates, diesel and gasoline, are the more powerful and immediate driver of near-term consumer price inflation compared to changes in central bank interest rates. This is not a claim that central banks are irrelevant. It is a more precise and actionable claim: that the two instruments operate on different time horizons, and that conflating them leads to both analytical confusion and policy error.

Central banks are the right institution for the right problem: anchoring long-run inflation expectations, combating wage-price spirals, and managing demand over multi-year cycles. But they are reactive to the kind of high-frequency, cost-push, energy-driven inflation spikes that have characterized the most acute episodes of recent economic history. A Federal Reserve rate decision announced on a Wednesday has essentially zero effect on the price a consumer pays for gasoline on Thursday, or for groceries the following week.

The distillate channel, by contrast, is immediate, systemic, and persistent, thanks to asymmetric price transmission, in ways in ways that exceed the duration of the underlying supply shock. This analysis calls for a reorientation of near-term inflation monitoring and policy discussion. Energy security, strategic refining capacity, and supply chain resilience are not just geopolitical concerns: they are inflation policy. For policymakers, business leaders, and investors focused on the next three to twelve months, the most actionable leading indicators are not found in central bank communications. They are found in the diesel crack spread, refinery utilization rates, and the geopolitical map of global refining infrastructure.

Relying solely on the delayed and indirect lever of interest rates to counteract the immediate and systemic shock of a distillate price spike is a strategy that guarantees policymakers will always be fighting the last war. The next inflationary skirmish is already underway at the pump.

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