What Is Crude Oil? Definition, Types and How It Is Used

Crude oil is the unrefined petroleum pumped from underground reservoirs, a thick liquid mix of hydrocarbons that gets separated and processed into gasoline, diesel, jet fuel, heating oil, and the petrochemical building blocks used in plastics, fertilizers, and thousands of everyday products. Understanding what crude oil is matters because its price ripples through nearly every corner of the economy, from what you pay at the pump to the cost of shipping goods across the globe. [[marketdata: AMEX:USO]] The United States Oil Fund (USO), which tracks the price of West Texas Intermediate crude through futures contracts, offers a real time window into how this market behaves. On the day this data was pulled, USO traded at 106.86 dollars, up 2.41 percent, sitting well below the midpoint of its 52 week range of 102.42 to 154.08. Its relative strength index reading of 35.4 suggests the fund has been under selling pressure and is approaching territory traders consider oversold, meaning the recent trend has skewed bearish even with the day's bounce. ## What Crude Oil Actually Is and Why It Comes in Different Grades Not all crude oil is the same. It varies by density, measured in API gravity, and by sulfur content, which determines whether it's labeled sweet or sour. Light sweet crudes like West Texas Intermediate and Brent are easier and cheaper to refine into gasoline and diesel, which is why they trade at a premium to heavier, sourer grades common in parts of the Middle East, Canada, and Venezuela. Refineries are often built to run specific blends, so a shift in global supply toward heavier or lighter crude can force costly retooling or push refiners to source oil from different regions entirely. This is one reason oil prices aren't a single number but a family of related benchmarks that move together while never moving identically. ## The Supply Side: Production, OPEC+, and Inventories 106.86 dollars is where USO stood after a daily gain of better than two percent, but the more telling detail is the gap between that price and the top of its 52 week range near 154. That kind of distance reflects a supply picture that has grown more comfortable over time. Production from the United States, which has become the world's largest crude producer through shale drilling, adds a steady stream of barrels that competes with output from OPEC+, the coalition of the Organization of the Petroleum Exporting Countries and allied producers including Russia. OPEC+ has spent recent years managing production quotas in an attempt to support prices, but compliance among member states is uneven, and every barrel of spare capacity sitting unused acts as a ceiling on how high prices can climb. Commercial inventory levels, tracked weekly in the United States by the Energy Information Administration, offer another lens: when stockpiles build faster than seasonal norms, it signals supply is outrunning demand, and prices tend to soften in response. [[image: oil pumpjack at dusk]] ## Demand, the Dollar, and Why Prices Swing on Geopolitics An RSI of 35.4 points toward a market that has been oversold, which typically happens when demand worries or a stronger dollar weigh on sentiment for an extended stretch. Oil is priced globally in dollars, so when the dollar strengthens against other currencies, oil becomes more expensive for buyers using euros, yen, or rupees, which can dampen demand and pressure prices even if nothing about physical supply has changed. Demand itself is tied closely to economic growth: manufacturing activity, freight and shipping volumes, and airline travel all consume crude derived fuels, so slowing growth in major economies like China or the United States tends to show up in softer oil demand forecasts. Geopolitics adds another layer entirely. Conflicts or sanctions touching major producing regions, particularly the Middle East, Russia, or Venezuela, can pull barrels off the market overnight, while the mere threat of disruption to shipping routes like the Strait of Hormuz can send prices higher on fear alone, even before any actual barrel fails to load. [[chart: AMEX:USO]] ## How to Read Crude Oil Price Moves Day to Day A single day's move, like the 2.41 percent gain in USO reflected here, rarely tells the whole story on its own. Traders and analysts weigh it against inventory reports, rig count data, OPEC+ meeting outcomes, and broader currency trends to judge whether a rally or selloff has real staying power or is simply a bounce within a larger trend. The 52 week range gives useful context too: a price sitting closer to the low end of that range, as USO's 106.86 dollars is relative to its 154.08 high, tells you the prevailing trend over the past year has been downward, even if short term moves swing higher on any given day. ## Frequently Asked Questions ### How is crude oil? Crude oil quality is measured by its density (API gravity) and sulfur content, which together determine whether it's classified as light or heavy, and sweet or sour, factors that affect how easily and cheaply it can be refined. ### Why is crude oil? Crude oil exists because it formed over millions of years from the remains of marine organisms buried under sediment, subjected to heat and pressure that converted organic material into hydrocarbons trapped in underground rock formations. ### When is crude oil? Crude oil is extracted continuously around the clock from wells worldwide, but price benchmarks and futures contracts settle on set schedules, with monthly contract expirations and daily market closes shaping when specific price quotes are recorded. ### Why crude oil news? Crude oil news matters because price swings affect fuel costs, inflation, transportation expenses, and the profitability of energy companies, making it closely watched by consumers, investors, and policymakers alike. ### Why is the oil red? When crude oil prices or related stocks and funds show red on a trading screen, it simply means the price has fallen compared to the previous close, a standard convention rather than anything specific to oil itself.

Live brent crude oil price and chart → Live crude oil price and chart →