FIELD: fat and oil industry.
SUBSTANCE: use of one or more acid oils directly obtained during acidification of at least one soap stock, lubricating power of fuel additive for fuel of internal combustion engine, wherein soap stock is obtained by means of refining process of at least one oil selected from vegetable oil and/or animal fat.
EFFECT: invention enables to obtain additive intended for fuel of internal combustion engine with low content of sulfur, for example, less than 500 parts per million (ppm) (by weight).
10 cl, 5 tbl, 2 ex
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