Mr. Rawles:
I was researching lanterns a couple of months ago and came across information that it is possibly hazardous to use gasoline in Petromax type lanterns.
http://lampguild.org/QandApage/archives/Q0002790.htm [1]
http://lampguild.org/QandApage/archives/Q0001491.htm [2]
http://lampguild.org/QandApage/archives/Q0002492.htm [3]
http://lampguild.org/QandApage/archives/Q0002487.htm [4]
I also found that Coleman makes a “kerosene only” pressure lantern http://www.coleman.com/coleman/ColemanCom/subcategory.asp?CategoryID=1025 [5] and two British companies make kerosene pressure lanterns Tilley http://www.tilleylamp.co.uk/ [6] and Vapalux http://www.bairstowbrothers.co.uk/vapalux/index.htm. [7] The Vapalux lamps carried in the USA by Garret Wade http://www.garrettwade.com [8]. Best Wishes, – C.H.