When filling the lamp use the funnel provided, insert the funnel tube in the lamps filler hole, only fill bowl 3/4 full or to the bottom of the filler hole neck this will ensure tht the lamp is easy to transport from one area to another. (Never use alternative oils). G.Wizz oil has been very refined with out a fragrance nor an oil smell, which is what makes it so suitable for fine dining, and is especially made for use in the G.Wizz lamps. Th oil is of low volatility and is safe to use, it is very economical and will not clog the wick.