Definicija: destilacijski produkt nafte, ki vre pri 180-300oC. Poznamo svetilni petrolej, motorni petrolej, industrijski petrolej in pretolej za peči

Definicija: Petroleum ether, also known as benzine, VM&P naphtha (varnish makers' & painters'), petroleum naphtha, naphtha ASTM, petroleum spirits, X4 or ligroin, is a group of various volatile, highly flammable, liquid hydrocarbon mixtures used chiefly as nonpolar solvents. Chemically, it is not an ether like diethyl ether, but a light hydrocarbon.

Definicija: rafinirana zmes trdih, nasičenih ogljikovodikov, večinoma razcepljenih parafinov, dobljenih iz nafte