Crude oil is used to make fuel for cars, trucks, planes, and ships, but it also serves as the raw material for plastics, synthetic fabrics, medicines, fertilizers, cosmetics, and thousands of other everyday products. In 2023, the United States alone consumed roughly 7.4 billion barrels of petroleum, with transportation fuels accounting for the largest share. The rest flows into virtually every corner of modern life, often in ways most people never think about.
How Crude Oil Becomes Usable Products
Crude oil straight from the ground is a complex mixture of hydrocarbons, molecules built from chains of 5 to 40 or more carbon atoms. It isn’t useful in that raw state. At a refinery, the oil is heated in a process called fractional distillation, which separates it into groups of molecules based on their boiling points. Lighter molecules with shorter carbon chains rise to the top of the distillation column and become gases and gasoline. Heavier molecules settle lower and become diesel, lubricating oils, and waxes.
The main fractions coming out of a refinery include gasoline, kerosene, jet fuel, diesel, heating oil, lubricants, and asphalt. About 6% of crude oil consists of very heavy hydrocarbons with more than 40 carbon atoms, which end up as asphalt for roads and roofing. A significant portion of the lighter fractions never becomes fuel at all. Instead, they’re sent to petrochemical plants where they’re transformed into the building blocks for plastics, synthetic fibers, and chemical products.
Transportation Fuels
The single biggest use of crude oil is powering vehicles. In 2023, finished motor gasoline made up about 44% of all U.S. petroleum consumption. Distillate fuels, a category that includes diesel and heating oil, accounted for another 19%. Jet fuel represented roughly 8%. Together, these three categories consume more than two-thirds of every barrel refined in the country.
Gasoline powers most passenger cars and light trucks. Diesel fuels the heavy freight trucks, trains, construction equipment, and agricultural machinery that keep supply chains running. Jet fuel (a refined form of kerosene) is the standard for commercial and military aviation. Large cargo ships and cruise liners burn a heavier grade called bunker fuel, one of the densest petroleum products produced.
Plastics and Packaging
Plastics are made from petroleum-derived chemicals called petrochemicals, primarily ethylene and propylene. These small molecules are linked into long polymer chains to create materials like polyethylene (used in grocery bags and bottles), polypropylene (food containers and car parts), and polystyrene (foam packaging). Nearly every piece of plastic you encounter, from your phone case to the packaging around your food, traces its origin back to a barrel of crude oil.
The scale is enormous. Plastics show up in construction materials, electronics, automotive interiors, toys, furniture, and food storage. Even biodegradable alternatives are still in early stages of replacing petroleum-based versions at any meaningful volume.
Synthetic Fabrics and Textiles
Synthetic fibers now account for about half of all fiber used globally, and they are made from petroleum byproducts. Polyester, the most common synthetic fabric for clothing, is produced from a polymer called PET (the same material in plastic water bottles). Nylon, acrylic, and spandex are also petroleum-derived.
These fibers dominate the market because they’re cheap to produce and have practical advantages: they resist wrinkles, repel stains, and hold up well against pests and mildew. Your athletic wear, winter jackets, carpet, upholstery, and even many “blended” cotton shirts contain petroleum-based fibers. The textile industry’s reliance on crude oil is one of the less visible but most pervasive uses of petroleum.
Medicine and Healthcare
Modern healthcare depends on petroleum in ways that go far beyond the ambulances that run on gasoline. Petroleum serves as a feedstock for manufacturing pharmaceuticals, medical plastics, and supplies. Common categories of drugs synthesized using petroleum-derived chemicals include pain relievers, antidepressants, cholesterol-lowering medications, diabetes drugs, and antihistamines.
Medical plastics are equally critical. The antiseptic model of modern medicine relies on single-use disposable items: gloves, IV tubing, syringes, surgical gowns, drug delivery devices, and sterile packaging. Nearly all of these are made from petroleum-based plastics. Implants and hernia repair materials also use petroleum-derived polymers, though researchers are working on biodegradable alternatives made from renewable materials.
Agriculture and Food Production
Crude oil plays a foundational role in feeding the world. Petroleum and natural gas provide the raw materials for synthetic fertilizers, which are essential to large-scale crop production. Many widely used pesticides and herbicides, including neonicotinoids and glyphosate formulations, are synthesized from oil and gas derivatives. Even the plastic mulch films, irrigation tubing, and packaging used in agriculture come from petroleum.
Beyond the chemistry, petroleum fuels the tractors, harvesters, and trucks that plant, harvest, and transport food. Intensive agriculture is deeply tied to fossil fuel consumption at every stage, from the fertilizer spread on fields to the diesel burned moving produce to grocery stores.
Household and Personal Care Products
Petroleum-based ingredients are staples in cleaning products and personal care items. Surfactants, the compounds that make soaps and detergents foam and cut through grease, are commonly derived from petrochemicals. Laundry detergent, dish soap, and all-purpose cleaners typically contain petroleum-based surfactants because they’re effective and inexpensive to manufacture.
In beauty and skincare, petroleum derivatives appear in shampoos, conditioners, moisturizers, lip balms, anti-aging creams, and makeup. Petroleum jelly itself is a refined byproduct of crude oil and has been used for over a century as a skin protectant. It’s still widely recommended for protecting delicate infant skin and managing conditions like eczema. Large manufacturers favor petroleum-based ingredients because they are cheap, stable, and readily available at industrial scale.
Roads, Roofing, and Construction
The heaviest fraction of crude oil, the material left after lighter fuels and chemicals have been separated out, becomes asphalt. This thick, sticky substance is mixed with gravel and sand to pave roads, highways, parking lots, and airport runways. It also serves as a waterproofing layer in roofing shingles and foundation coatings. Virtually every paved surface you drive or walk on exists because of crude oil.
Lubricants are another important output. Engine oils, transmission fluids, hydraulic fluids, and industrial greases are refined from heavier petroleum fractions. These products reduce friction and wear in everything from car engines to factory equipment, and synthetic alternatives still often start with petroleum-based feedstocks.
Energy Beyond Transportation
While transportation dominates petroleum consumption, crude oil products also generate electricity and heat buildings. Heating oil, chemically similar to diesel, warms millions of homes, particularly in the northeastern United States. Some power plants, especially in oil-producing regions, burn petroleum products to generate electricity, though this share has declined as natural gas and renewables have expanded. Propane, a light hydrocarbon separated during refining, fuels home heating systems, outdoor grills, and agricultural grain dryers across rural areas.