Inspired by GoT, I wanted the dragons of Arcadia (the world I'm building) to have their fire breath in the most biological way possible. By this I mean that fire will not be magical, technological, nor through ingesting stones rich in hypergolic gases or chewing stones to generate sparks. Through a gland, dragons produce a flammable oil from the fat of the animals they eat. To release the oil, dragons have two holes in the corners of their mouths. To ignite the oil, dragons first release charged oil droplets under an electrical arc of about 1200 volts (as dragons are of dinosaur proportions I don't think this will be a problem), this creates initial flares to ignite the jet of oil. that comes right after. But it is still open what this oil would be made of, what components(and i think just saying that oil is flammable is somewhat vague information).
What would be the ideal chemical composition to help create an efficient exothermic reaction?
Details for those who want to create a well-constructed answer: highlight every component that may be in the oil, every acid, salt, etc. The important thing is that all components must be obtained through a meat-based diet. The diet is not limited to one type of meat, dragons can eat cow, horse, whale, fish, birds, humans... Any type of vertebrate that is not poisonous. I intend to make a variety of species, so if I can talk more about a mixture for oil (with variations in potency, of course), it would be very helpful.