Oil

There were several types of oils in the Realms. Typically, lamp oil was referred to as simply "oil", and was used primarily to fuel lamps and lanterns.

Description
Regular lamp oil usually came in clay flasks that could hold up to 1 pint (473 ml) of oil. This amount was sufficient to power most typical lamps and lanterns for 6 hours. If a creature was covered in oil, its flammability increased the efficacy of attacks with fire upon it considerably.

Flasks of pure whale oil, which did not exhale any unpleasant scents when burned, were available for purchase through Aurora's Whole Realms Catalogue.