Guide

EIA Weekly Petroleum Status Report explained

Harbor Energy’s crude desk shorted NYMEX WTI after API leaked a 4.8-million-barrel build on Tuesday evening, then watched futures rally $1.40 on Wednesday when the official EIA Weekly Petroleum Status Report (WPSR) showed a headline crude build of only 1.2 million barrels — with Cushing stocks down 2.1 million and gasoline inventories falling 3.4 million. The desk had traded the aggregate number while ignoring the location and product splits that refiners and pipeline operators actually care about. After rebuilding their release-day playbook around WPSR tables instead of Twitter headlines, six-week directional hit rate on inventory days rose from 41% to 68% and average slippage per clip fell from 18 to 6 basis points.

Every Wednesday at 10:30 a.m. Eastern (except federal holidays), the U.S. Energy Information Administration publishes the Weekly Petroleum Status Report — the most complete public snapshot of U.S. crude oil, gasoline, distillate, jet fuel, and propane inventories, refinery throughput, imports, exports, and production. Futures algorithms, refinery schedulers, and macro strategists all react within seconds. This guide explains what the WPSR measures, how it differs from the Tuesday API survey, which tables matter for WTI crude and crack spreads, how to read builds versus draws in context, the Harbor Energy refactor, a technique decision table vs price-only trading, pitfalls, and a checklist — complementing our natural gas prices guide and producer price index guide.

What the WPSR is

The Weekly Petroleum Status Report is a federal statistical release compiled by the EIA from mandatory Form EIA-800 surveys of refiners, blenders, bulk terminals, and pipeline operators, supplemented by Customs import data and satellite- corroborated storage estimates where available. It covers the week ending the prior Friday (report week). The headline “U.S. commercial crude inventories” is the number financial media quotes first, but the full release spans more than a dozen tables: crude by PADD, Cushing Oklahoma hub stocks, gasoline and distillate by region, refinery utilization, crude imports and exports, product supplied (proxy for demand), and Strategic Petroleum Reserve (SPR) movements.

Release calendar and market impact

WPSR publishes at 10:30 a.m. ET Wednesday, roughly 18 hours after the American Petroleum Institute (API) publishes its voluntary industry survey on Tuesday afternoons. WTI and Brent futures, RBOB gasoline, and ULSD heating oil contracts typically spike in the first 30–60 seconds. Options implied volatility into “EIA day” is structurally elevated. The report is a stock snapshot — it does not directly forecast OPEC decisions or hurricane damage, but it validates whether physical balances are tight or loose right now in the world’s largest oil consumer.

WPSR vs API

Feature	EIA WPSR	API weekly
Timing	Wed 10:30 a.m. ET	Tue ~4:30 p.m. ET
Survey basis	Mandatory federal filing	Voluntary member survey
Revision policy	Revised next week if needed	Often revised silently
Market authority	Official benchmark for U.S. stocks	Leading indicator; frequently diverges
Detail depth	PADD splits, exports, utilization	Headline crude + major products

Traders use API for positioning ahead of EIA; algorithms increasingly fade large API/EIA divergences when Cushing and product data tell a cleaner story than headline crude.

Key tables and line items

A disciplined read walks the release in physical order: crude location, products, throughput, then trade flows.

Commercial crude oil inventories

Total U.S. commercial crude stocks (excludes SPR) are reported in million barrels and versus the five-year seasonal average. A “build” means inventories rose week-over-week (bearish for price, all else equal); a “draw” means stocks fell (bullish). Context matters: a 3-million-barrel build during refinery maintenance season may be normal; the same build in peak driving season is alarming.

Cushing, Oklahoma stocks

Cushing inventories are the delivery point for NYMEX WTI futures. Low Cushing stocks relative to pipeline capacity tighten the prompt contract and can widen backwardation; high Cushing stocks pressure front-month prices even when Gulf Coast stocks are balanced. When headline crude builds but Cushing draws, WTI often rallies — the Harbor Energy miss described above.

Motor gasoline and distillate

Finished motor gasoline and distillate fuel oil (diesel and heating oil) inventories signal product market tightness. Gasoline draws into summer driving season support crack spreads (refinery margin of gasoline over crude). Distillate draws during harvest or winter heating season move ULSD futures independently of crude. Watch product supplied — EIA’s demand proxy computed as production + imports − stock change − exports.

Refinery utilization

Operable utilization is refinery throughput as a percent of nameplate capacity. Utilization above 92% in summer leaves little spare capacity for shock absorption; utilization drops during spring and fall turnaround seasons, mechanically lifting crude stocks even when demand is stable.

Imports, exports, and production

The U.S. is simultaneously a large crude importer of heavy grades and a growing exporter of light sweet crude and refined products. Rising crude exports can draw Gulf Coast stocks without implying weak domestic demand. Weekly U.S. crude production (EIA model plus survey) moves slowly but confirms shale trend; single-week noise is common.

Strategic Petroleum Reserve

SPR stocks are government-owned emergency barrels stored in salt caverns. Commercial inventory tables exclude SPR. Coordinated SPR releases add supply to the market through commercial channels; refills withdraw supply. Track SPR separately — a commercial crude draw paired with SPR release means something different than a demand-driven draw.

How to interpret builds and draws

Raw million-barrel surprises are meaningless without seasonal and regional context. Professional desks compare each line to:

Consensus forecast — Bloomberg/Reuters median of analyst surveys published before 10:30.
Five-year average change for the same week — EIA tables include level vs five-year range bands.
PADD geography — PADD 3 (Gulf Coast) dominates exports; PADD 2 includes Cushing; PADD 1 East Coast is import-dependent.
Weather and events — Gulf hurricanes, Midwest refinery fires, and pipeline outages explain one-off moves.

Crack spreads and macro links

Refinery margins link WPSR product data to equity sectors (refiners, airlines, trucking) and inflation. Gasoline prices feed CPI energy with a lag; distillate ties to freight and PPI intermediate goods. A sustained gasoline draw below five-year averages often precedes pump price increases by two to four weeks. Dollar moves through DXY affect import parity for crude but rarely explain a single week’s inventory surprise.

Harbor Energy trading desk refactor

Harbor Energy runs a small prop crude and products book alongside physical Gulf Coast storage. The legacy Wednesday workflow:

Position from API headline crude +/- consensus at Tuesday close.
Fade or add on EIA headline crude surprise vs API.
Ignore Cushing, gasoline, and utilization unless a headline exceeded 5 million barrels.

In March 2025, API reported a 4.8-million-barrel crude build; Harbor added short exposure. EIA printed +1.2 million crude with Cushing −2.1 million, gasoline −3.4 million, utilization +1.8 percentage points to 89.4%. WTI rallied 2.3% into the close as shorts covered. Loss on the clip: $2.3 million.

The refactor:

Scorecard template — six rows (headline crude, Cushing, gasoline, distillate, utilization, crude exports) each vs consensus before any trade.
Net tightness index — weighted sum: Cushing draw counts 1.5× headline crude; gasoline draw in summer counts 1.2×; utilization surprise normalized by seasonal band.
API fade rule — if API and EIA crude diverge by more than 3 million barrels, wait 90 seconds post-release for product table parsing before adding risk.
SPR flag — separate commercial from SPR-adjusted implied demand when government releases are active.

Metric	Before	After
Inventory-day directional hit rate	41%	68%
Average slippage per clip (bps)	18	6
False short signals on Cushing draws	7 in 8 weeks	1 in 8 weeks
Max single-day inventory loss ($k)	2,300	420

The desk still loses on geopolitical gaps — WPSR does not predict tanker attacks — but stopped donating edge on routine inventory Wednesdays.

Technique decision table

Approach	Best when	Weak when
Headline crude surprise only	Fast execution; large consensus miss; quiet product markets	Cushing/product splits contradict; turnaround season
Full WPSR scorecard (crude + Cushing + products + utilization)	Systematic prop or physical trading; crack spread books	Need sub-second latency; headline algos already moved price
API positioning, EIA confirmation	Tuesday evening risk with Wednesday exit	API/EIA diverge; API revision history noisy
Five-year seasonal band analysis	Medium-term inventory normalization trades	Structural demand shifts (EV adoption, export capacity)
Crack spread / product-focused read	Refinery margin hedging; gasoline seasonality	Crude geopolitical spikes dominate
Ignore inventories; trade OPEC and macro	Supply-cut headlines; war risk premia	Physical tightness accumulates in stocks first

Common pitfalls

Trading headline crude without Cushing — NYMEX delivery economics live at Cushing; Gulf Coast builds can mask hub tightness.
Ignoring product draws during crude builds — strong demand can pull products down while crude rises on import timing.
Treating API as final — mandatory EIA data revises; large API/EIA gaps are common.
Missing utilization seasonality — spring and fall maintenance mechanically builds crude; summer peaks draw gasoline.
Confusing SPR and commercial stocks — policy releases distort week-to-week commercial flows.
Single-week overfitting — one hurricane-distorted draw does not prove a new deficit regime.
Forgetting exports — rising U.S. crude exports lower visible stocks without weakening global demand.

Production checklist

Subscribe to EIA email/web release at 10:30 ET; verify report week ending date.
Record consensus crude, Cushing, gasoline, distillate, and utilization forecasts before the number.
Parse Table 1 (crude), Cushing line, gasoline/distillate stocks, and utilization within first two minutes.
Compare each line to five-year seasonal average level and week-over-week change.
Check crude imports, exports, and production for supply-side explanation.
Read product supplied for gasoline and distillate demand proxies.
Flag active SPR release or refill programs separately from commercial balances.
Cross-check API Tuesday print; note divergence above 3 million barrels.
Map PADD surprises if regional pipeline or refinery news is live.
Log post-release WTI move vs scorecard; review false signals weekly.

Key takeaways

The EIA Weekly Petroleum Status Report is the authoritative U.S. oil inventory release every Wednesday at 10:30 a.m. ET.
Headline crude builds and draws are only the entry point — Cushing, gasoline, distillate, utilization, and exports often tell the opposite story.
API on Tuesday leads EIA on Wednesday; trade the divergence carefully because mandatory EIA data frequently revises the narrative.
Harbor Energy cut inventory-day slippage from 18 to 6 bps by scoring six WPSR lines instead of headline crude alone.
Link product stocks to crack spreads and CPI/PPI energy with a lag — WPSR is a physical balance snapshot, not a geopolitical oracle.