Board Thread:Suggestions forum/@comment-27991709-20160801171429/@comment-26172435-20160803100541

I'd guess the easiest available resources for oil would have been plants like linseed or olives. These aren't really suitable for heating to very high temperatures though.

I'd fancy introduction of linseed as plant and resource, for obtaining oil for use in oil lamps ... might do for a meaningful suggestion. ;)