I am Canadian and my father has spent a few years in the extreme northen part of Canada as a government contractor.

The natives over there kill belugas(these are cute little white whales you see on TV) and they use the fat as a fuel. The fat has to be heated up until it turns into a liquid and then it is run thru a screen and is used for lanterns or small outdoor furnaces and other things.

I think it's possible but maybe not worth the hassle since it has to be heated to break it down and screened to be used as a fuel.

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1985 300D : the clean one 180k miles - Now passed onto my parents.
2000 E39 M5
2002 e46 330xit
1991 mustang notch (project)
1970 chevelle (project)