Cooking oils vs Carrier oils

Carrier oil.wikipedia
"Carrier oil, also known as base oil or vegetable oil, is used to dilute essential oils and absolutes before they are applied to the skin in massage and aromatherapy."
"High quality oils sold for culinary use are often eminently suitable for massage use, and are economical; those obtained by cold pressing are preferred."

makeskincare.blogspot.ca - Cosmetic Grade vs Food Grade for your Skin Care Making
"Pharmaceutical grade skin care products are FDA regulated...99.9% pure ingredients"
"Cosmetic Grade ... 70% pure"
"Food grade ... eaten safely"

naturallycurly.com - DIFFERENCES IN FOOD-GRADE OILS VERSUS COSMETIC GRADE.threds

skincaretalk.com - cosmetic vs. food grade oil
"Food grade: no fine particles (heavily filtered), no biological contaminants (oganisms), and no adulterants."

mountainroseherbs.com -A Note about the different qualities of oil
"Cold Pressed - A method of mechanical extraction where heat is reduced and minimized throughout the batching of the raw material. This helps the oil maintain its original state, constituents, and depth. Temperatures are rigorously controlled to ensure that it does not exceed 80-90 degrees Fahrenheit. Although not a practical method of extraction for all vegetable oils on the market it is highly regarded as the extraction method of choice.

Expeller Pressed - A method of natural, mechanical extraction and processing of oils where a small amount of heat is produced simply through the frictional heat created by hydraulic presses. This is usually around 120-200 degrees Fahrenheit and makes the oil suitable and economical as a base for cosmetics because of its fairly undisturbed molecular state. It also makes a fine food grade oil.

Refined - A fully processed oil where it has been exposed to all methods of refinement including a flash fluctuation in temperature as high as 450 degrees and winterization as low as -30 degrees, deodorization, which removes the heavy and often unsettling odor in oil, and finally bleaching, where natural clays and other mediums are used to alter or remove an oils color, and scent. This makes for an economical oil in cosmetics and body care products, but it is not the healthiest as a food grade oil.

Partially Refined - A process where only some of the methods available are employed to produce a manufactured oil. Only one or two of the three available methods are used in a partially refined oil. These include, but are not limited to; deodorization, winterization and natural bleaching. These methods are used for oils which have been known historically to go rancid quickly, and they are also used to further stabilize an oil or remove its heavy odor and deep color.

Unrefined - A process of mechanical extraction and screen filtering where no additional refining process has taken place. This ensures the finest quality product and makes the oil the most exquisite for food and cosmetic preparation. The unrefined process helps oil retain a rich, strong flavor and color that is true to its natural state. Unrefined oils are always darker in color and richer in scent."

Saponification value.wikipedia

fromnaturewithlove.com - Saponification Chart

aromaweb.com - Shopping For Carrier Oils