the question of what gas is what seems to come up regularly ; Alan is , of course correct , it is all lpg
calor is , of course just a brand name like tesco or hoover , they just buy and distribute , in other words they fill bottles and tanks , and are on record as saying that what they sell on forecourts as lpg and what they sell in propane bottles [ and what they put in bulk tanks at your home or similar ] is identical ; in fact it is an international traded product known as industrial grade propane . a semi-refined product which is very largely propane but also a small percentage of other hydrocarbon substances ...frankly it is not necessary to have a pure propane for the purpose in hand
with regard to additives for lpg sold for road use , as a long term user of this product I can assure you that there are no additives ...if the user wants this he has to fit special equipment to add it to the propane as it is consumed
I have had a chat with my local lpg tanker driver [ not calor ] who confirmed that he fills his tanker from the same tank as is used to fill propane bottles , and he delivers it to domestic / industrial heating tanks and to filling stations for sale as lpg
dometic is , of course , american ; there they call it all propane , but the same product is again used for all purposes ; so it is hard to believe that they would especially make a fridge for europe that can't be run on lpg which is propane anyway !
alan made a point about dirty butane in morocco ; they don't seem to filter the butane before sale , so I concur ....however I have never encountered this in europe or N.america ; but when I have been to the gas factory and filled with propane it was to european standards ..this seems logical as bulk customers would not be amused at constantly having to clean their equipment
so if your fridge runs on 12v and 240v , but not on gas even though it lights...yank it out and clean out the soot ; if it won't light it is often just a bit of rust fallen down on the jet ...which is why the old ..take it out and turn it upside down ....idea works ; personally I have access to a high pressure air jet .....sticking that down the chimney instead often works as well !
and do bear in mind that the european sized fridges are normally marginal for cooling capacity , especially on gas ; in really hot weather be prepared to buy something frozen to put in to help out , and set it to maximum cold and run on 240v before you set out !