A wood burner can use a "Lava Bucket 327" for 1000 seconds of energy output. However the bucket is destroyed, there is also an output of 1 "Ash 4390:2." It is somewhat of a blessing that lava can be used as an energy source early game in this method and I wouldn't be surprised if this feature is removed due to the wood burners main purpose being to turn wood into ash for carbon and to get some energy output in the process. I would also like to mention that lava can be put into the fluid bar on the right when the arrow is pressed but it does not allow the machine to turn on.

A possible fix is allowing the bucket to pop out in the area where the ash usually outputs. But it's not my call and I wanted to bring this into the open. Thank you.