Just learned this from a buddy, tried it and it works great! Fined a spruce tree that has alot of pine cone petals (squirrel left overs) gather them up and put in a coffee can. Next mix some diesel and 2stroke oil 50/50 mix. Add fuel mix to pine cone shavings, don't make a soup but so they soak up the mixture. And there you have it, burns hot but not fast and will not explode in your face. When going into the field dump some in a film canister, wieghs nothing and one canister will get you a nice fire rolling.