If the fat is rendered in a double boiler, not in a pan over direct heat, you will get more oil from the process & it will separate out of the 'grease', to be poured off later. This oil will be clear, like water, not cloudy or mushy with shortening.
It's very nice stuff, but I do not see it as being superior, more likely equal to Track's Mink Oil as a patch lube.
Marmot oil is also good & a good water-proofer for leather boots.
The fat from around the organs is of higher oil content than the heavy fat outside the cavity, on all animals.
You can take a lump of marmot innard's fat and just rub it on your boots. Done. Then, you will need to wash your hands, quite likely twice with dish washing fluid, to get the oil off them.
It's quite incredible.