Lamp oil stills can be found in the Chemist's House in Rimmington and near Miltog's stall in Dorgesh-Kaan. They can be used to make lamp oil or impling jars.

To make oil for lanterns, use swamp tar on the lamp oil still, then use an empty oil lamp, oil lantern, or a bullseye lantern on the oil still to fill it.

To make an impling jar, use imp repellent on the oil still (only works in the one in Rimmington however), then use a butterfly jar on it.