The list of vegetable oils includes all vegetable oils that are extracted from plants by placing the relevant part of the plant under pressure, to squeeze the oil out. Although few plants are entirely without oil, the oil from a small set of major oil crops  complemented by a few dozen minor oil crops has become widely used and traded.

Oils may also be extracted from plants by dissolving parts of plants in water or another solvent, and distilling the oil (known as essential oils), or by infusing parts of plants in a base oil (a process known as maceration; see list of macerated oils). The distilled essential oils often have quite different properties and uses to vegetable oils, and are listed in the list of essential oils.

Vegetable oils can be classified in several ways, for example:     

By source: most, but not all vegetable oils are extracted from the fruits or seeds of plants, and the oils may be classified by grouping oils from similar plants, such as "nut oils".

By use: oils from plants are used in cooking, for fuel, for cosmetics, for medical purposes, and for other industrial purposes.

The vegetable oils are grouped below in common classes of use.

Edible oils

Major oils:
 
Sunflowers are the source of Sunflower oil.These oils account for a significant fraction of world-wide edible oil production. All are also used as fuel oils.
Coconut oil, a cooking oil, high in saturated fat, particularly used in baking and cosmetics.
Corn oil, a common cooking oil with little odor or taste.
Cottonseed oil, used in manufacturing potato chips and other snack foods. Very low in trans fats.
Canola oil (a variety of rapeseed oil), one of the most widely used cooking oils, from a (trademarked) cultivar of rapeseed.
Olive oil, used in cooking, cosmetics, soaps, and as a fuel for traditional oil lamps.
Palm oil, the most widely produced tropical oil. Also used to make biofuel.
Peanut oil (Ground nut oil), a clear oil used for dressing salads and, due to its high smoke point, especially used for frying.
Safflower oil, produced for export for over 50 years, first for use in paint industry, now mostly as a cooking oil.
Sesame oil, cold pressed as light cooking oil, hot pressed for a darker and stronger flavor.
Soybean oil, produced as a byproduct of processing soy meal.
Sunflower oil, a common cooking oil, also used to make biodiesel.

Nut oils:
 
Hazelnuts from the Common Hazel, used to make Hazelnut oil.Nut oils are generally used in cooking, for their flavor. They are also quite costly, because of the difficulty of extracting the oil.
Almond oil, used as an edible oil, but primarily in the manufacture of pharmaceuticals.
Cashew oil, somewhat comparable to olive oil. May have value for fighting dental cavities.
Hazelnut oil, mainly used for its flavor. Also used in skin care, because of its slight astringent nature.
Macadamia oil, strongly flavored, contains no trans-fats, and a good balance of omega-3 and omega-6.
Pecan oil, valued as a food oil, but requiring fresh pecans for good quality oil.
Pistachio oil, strongly flavored oil, particularly for use in salads.
Walnut oil, used for its flavor, also used by Renaissance painters in oil paints.

Oils from melon and gourd seeds:

Members of the cucurbitaceae include gourds, melons, pumpkins, and squashes. Seeds from these plants are noted for their oil content, but little information is available on methods of extracting the oil. In most cases, the plants are grown as food, with dietary use of the oils as a byproduct of using the seeds as food.

Bottle gourd oil, extracted from the seeds of the Lagenaria siceraria, widely grown in tropical regions throughout the world. Used medicinally and as an edible oil.
Buffalo gourd oil, from the seeds of the Cucurbita foetidissima, a vine with a rank odor, native to southwest North America.
Pumpkin seed oil, a specialty cooking oil, produced in Austria and Slovenia. Poor tolerance for high temperatures.
Watermelon seed oil, pressed from the seeds of Citrullus vulgaris. Traditionally used in cooking in West Africa.

Food supplements:

A number of oils are used as food supplements, for their nutrient content or medical effect.

Acai oil, from the fruit of several species of the Açaí Palm (Euterpe). Grown in the Amazon region. Similar to grape seed oil. They are used in cosmetics and as a food supplement.
Blackcurrant seed oil, used as a food supplement, because of high content of omega-3 and omega-6 fatty acids.
Borage seed oil, similar to blackcurrant seed oil, used primarily medicinally.
Evening primrose oil, used as a food supplement for its purported medicinal properties.

Other edible oils:
 
Carob seed pods, used to make carob pod oil.Amaranth oil, high in squalene and unsaturated fatty acids, used in food and cosmetic industries.
Apricot oil, similar to, but much cheaper than almond oil, which it resembles. Only obtained from certain cultivars.
Argan oil, a food oil from Morocco that has also attracted recent attention in Europe.
Artichoke oil, extracted from the seeds of the Cynara cardunculus. Similar in use and composition to safflower and sunflower oil.
Avocado oil, used a substitute for olive oil. Also used in cosmetics. Unusually high smoke point of 510°F.
Babassu oil, similar to, and used as a substitute for, coconut oil.
Ben oil, extracted from the seeds of the Moringa oleifera. High in behenic acid. Extremely stable edible oil. Also suitable for biofuel.[citation needed]
Borneo tallow nut oil, extracted from the fruit of species of genus Shorea. Used as a substitute for cocoa butter, and to make soap, candles, cosmetics and medicines.
Carob pod oil (Algaroba oil), from carob, used medicinally.
Cohune oil, from the Attalea cohune (cohune palm), similar to coconut oil in makeup and usage
Coriander seed oil, from coriander seeds, used medicinally. Also used as a flavoring agent in pharmaceutical and food industries.
False flax oil made of the seeds of Camelina sativa, available in Russia as ryjhikovoye maslo . Considered promising as a food or fuel oil.
 
Coriander seeds are the source of an edible pressed oil, Coriander seed oil.Grape seed oil, suitable for cooking at high temperatures. Also used as a salad oil, and in cosmetics.
Hemp oil, a high quality food oil.
Kapok seed oil, used as an edible oil, and in soap production.
Lallemantia oil, from the seeds of Lallemantia iberica, discovered at archeological sites in northern Greece.
Meadowfoam seed oil, highly stable oil, with over 98% long-chain fatty acids. Competes with rapeseed oil for industrial applications.
Mustard oil (pressed), used in India as a cooking oil. Also used as a massage oil.
Okra seed oil (Hibiscus seed oil), from the seed of the Hibiscus esculentus. Composed predominantly of oleic and linoleic acids.
Perilla seed oil, high in omega-3 fatty acids. Used as an edible oil, for medicinal purposes, in skin care products and as a drying oil.
Pequi oil, extracted from the seeds of Caryocar brasiliensis. Used in Brazil as a highly prized cooking oil.
Pine nut oil. An expensive food oil, from pine nuts, used in salads and as a condiment.
Poppyseed oil, used for cooking, moisturizing skin, in paints and varnishes, and in soaps.
Prune kernel oil, marketed as a gourmet cooking oil.
Quinoa oil, similar in composition and use to corn oil.
Ramtil oil, pressed from the seeds of the one of several species of genus Guizotia abyssinica (Niger pea) in India and Ethiopia. Used for both cooking and lighting.
Rice bran oil, suitable for high temperature cooking. Widely used in Asia.
Tea oil (Camellia oil), widely used in southern China as a cooking oil. Also used in making soaps, hair oils and a variety of other products.
Thistle oil, pressed from the seeds of Silybum marianum. Relatively unstable. Also used for skin care products.
Wheat germ oil, used as a food supplement, and for its "grainy" flavor. Also used medicinally. Highly unstable.

Oils used for biofuel
See also: Vegetable oil used as fuel

A number of the oils listed above are used for biofuel (biodiesel and Straight Vegetable Oil) in addition to having other uses. A number of oils are used only as biofuel.

Although diesel engines were invented, in part, with vegetable oil in mind,diesel fuel is almost exclusively petroleum-based. Rising oil prices have made biodiesel more attractive. Vegetable oils are evaluated for use as a biofuel based on:

Suitability as a fuel, based on flash point, energy content, viscosity, combustion products and other factors
Cost, based in part on yield, effort required to grow and harvest, and post-harvest processing cost
 
Multipurpose oils also used as biofuel:

The oils listed immediately below are all (primarily) used for other purposes - all but tung oil are edible - but have been considered for use as biofuel.

Castor oil, lower cost than many candidates. Kinematic viscosity may be an issue.
Coconut oil (copra oil), promising for local use in places that produce coconuts.
Corn oil, appealing because of the abundance of maize as a crop.
Cottonseed oil, shown in one study not to be cost effective when compared with standard diesel.
False flax oil, from Camelina sativa, used in Europe in oil lamps until the 18th century.
Hemp oil, relatively low in emissions. High flash point. Production is problematic in some countries because of its association with marijuana.
Mustard oil, shown to be comparable to Canola oil as a biofuel.
Palm oil, very popular for biofuel, but the environmental impact from growing large quantities of oil palms has recently called the use of palm oil into question.
Peanut oil, used in one of the first demonstrations of the Diesel engine in 1900.
Radish oil. Wild radish contains up to 48% oil, making it appealing as a fuel.
Rapeseed oil, the most common base oil used in Europe in biodiesel production.
Ramtil oil, used for lighting in India.
Rice bran oil, appealing because of lower cost than many other vegetable oils. Widely grown in Asia.
Safflower oil, explored recently as a biofuel in Montana.
Soybean oil, not economical as a fuel crop, but appealing as a byproduct of soybean crops for other uses.
Sunflower oil, suitable as a fuel, but not necessarily cost effective.
Tung oil, referenced in several lists of vegetable oils that are suitable for biodiesel.

Inedible oils used only or primarily as biofuel:

These oils are extracted from plants that are cultivated solely for producing oil-based biofuel. These, plus the major oils described above, have received much more attention as fuel oils than other plant oils.

Algae oil, recently developed by MIT scientist Isaac Berzin. Byproduct of a smokestack emission reduction system.
Copaiba, an oleoresin tapped from species of genus Copaifera. Used in Brazil as a major source of biodiesel.
Honge oil, pioneered as a biofuel by Udipi Shrinivasa in Bangalore, India.
Jatropha oil, widely used in India as a fuel oil. Has attracted strong proponents for use as a biofuel.
Jojoba oil, from the Simmondsia chinensis, a desert shrub.
Milk bush, popularized by chemist Melvin Calvin in the 1950s. Researched in the 1980s by Petrobras, the Brazilian national petroleum company.
Petroleum nut oil, from the Petroleum nut native to the Philippines. The Philippine government once explored the use of the petroleum nut as a biofuel.

Drying oils

Drying oils are vegetable oils that dry to a hard finish at normal room temperature. Such oils are used as the basis of oil paints, and in other paint and wood finishing applications. In addition to the oils listed here, walnut, sunflower and safflower oil are also considered to be drying oils.
Dammar oil, from the Canarium strictum, used in paint as a drying agent. Can also be used as in oil lamps.
Linseed oil, used in paints, also suitable for human consumption.
Poppyseed oil, similar in usage to linseed oil but with better color stability.
Stillingia oil (also called Chinese vegetable tallow oil), obtained by solvent from the seeds of Sapium sebiferum. Used as a drying agent in paints and varnishes.
Tung oil, used in wood finishing.
Vernonia oil is produced from the seeds of the Vernonia galamensis. It is composed of 73-80% vernolic acid, which can be used to make epoxies for manufacturing adhesives, varnishes and paints, and industrial coatings.

Other oils

A number of pressed vegetable oils are either not edible, or not used as an edible oil.

Castor beans are the source of castor oilAmur cork tree fruit oil, pressed from the fruit of the Phellodendron amurense, used medicinally and as an insecticide.
Apple seed oil, used in cosmetics for its hydrating properties.
Balanos oil, pressed from the seeds of Balanites aegyptiaca, was used in ancient Egypt as the base for perfumes.
Bladderpod oil, pressed from the seeds of Lesquerella fendleri, native to North America. Rich in lesquerolic acid, which is chemically similar to the ricinoleic acid found in castor oil. Many industrial uses. Possible substitute for castor oil as it requires much less moisture than castor beans.
Brucea javanica oil, extracted from the seeds of the Brucea javanica. Used medicinally.
Burdock oil (Bur oil) extracted from the root of the burdock. Used medicinally in scalp treatment.
Candlenut oil (Kukui nut oil), produced in Hawai'i, used primarily for skin care products.
Carrot seed oil (pressed), from carrot seeds, used in skin care products.
Castor oil, with many industrial and medicinal uses. Castor beans are also a source of the toxin ricin.
Chaulmoogra oil, from the seeds of Taraktogenos kurzli, used for many centuries, internally and externally, to treat leprosy. Also used to treat secondary syphilis, rheumatism, scrofula, and in phthisis.
Crambe oil, extracted from the seeds of the Crambe abyssinica, is used as an industrial lubricant, a corrosion inhibitor, and as an ingredient in the manufacture of synthetic rubber.
Cuphea oil, from a number of species of genre Cuphea. Of interest as sources of medium chain triglycerides.
Jojoba oil, used in cosmetics as an alternative to whale oil spermaceti.
Lemon oil, similar in fragrance to the fruit. One of a small number of cold pressed essential oils. Used medicinally, as an antiseptic, and in cosmetics.
Mango oil, pressed from the stones of the mango fruit, is high in stearic acid, and can be used for making soap.
Mowrah butter, from the seeds of the Madhuca latifolia and Madhuca longifolia, both native to India. Crude Mowrah butter is used as a fat for spinning wool, for making candles and soap. The refined fat is used as an edible fat and vegetable ghee in India.
Neem oil, used in cosmetics, for medicinal purposes, and as an insecticide.
Orange oil, like lemon oil, cold pressed rather than distilled. Consists of 90% d-Limonene. Used as a fragrance, in cleaning products and in flavoring foods.
The fruit of the sea buckthornPalm oil, extracted from the kernel of the palm fruit. High in saturated fats. Popular in West African and Brazilian cuisine.
Rosehip seed oil, used primarily in skin care products, particularly for aging or damaged skin. Produced in Chile.
Sea buckthorn oil, derived from Hippophae rhamnoides, produced in northern China, used primarily medicinally.
Shea butter, used primarily in skin care products.
Snowball seed oil (Viburnum oil), from Viburnum opulus seeds. High in tocopherol, carotinoides and unsaturated fatty acids. Used medicinally.
Tall oil, produced as a byproduct of wood pulp manufacture. A further byproduct called tall oil fatty acid (TOFA) is a cheap source of oleic acid.
Tamanu oil, originates in Tahiti, from the Calophyllum tacamahaca, used for skin care and medicinally.
Tonka bean oil (Cumaru oil), used for flavoring tobacco and snuff.

Source:Wikipedia  

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