It is extensively adulterated with poppy, nut, and teel oil, and not unfrequently with refined rape or colza oil.
Furneaux recognized the pungent scent of the colza oil used in policemen's lamps.
It is not easy to alter this, but colza oil will at least prevent the surface skinning over.
colza oil is extensively used as a lubricant for machinery, and for burning in lamps.
He was saturated in colza oil, and the smashed tin lay beside him, but luckily the flame had been extinguished by his fall.