Oleo is a term for oils. It is commonly used to refer to a variety of things:
Colloquial term for margarine, a.k.a. oleomargarineOleic acidOleo strut, a type of shock absorbers on aircraft landing gear"Oleo" (composition), a composition by Sonny RollinsOleo (Grant Green album), a 1962 album by Grant Green featuring the above compositionOleo (Lee Konitz album), a 1975 album by Lee Konitz featuring the above compositionOleo (Joe McPhee album), a 1983 album by Joe McPhee featuring the above compositionÓleo, a city in the São Paulo state in BrazilGNU Oleo, a (defunct) spreadsheet programOleo drop, a kind of theater curtain