Unbalanced biofuel production if basic_materials is installed

[oz-tal]

There's a balancing issue around the production of biofuel from this compatibility patch:

--Basic Materials
register_biofuel("basic_materials:oil_extract")

if minetest.get_modpath("basic_materials") then

minetest.register_craft({
	type = "shapeless",
	output = "basic_materials:oil_extract 2",
	recipe = {"biofuel:bottle_fuel", "biofuel:bottle_fuel"}
})

end

For some context, basic_materials crafting recipe for oil_extract is:

minetest.register_craft({
	type = "shapeless",
	output = "basic_materials:oil_extract 2",
	recipe = {
		"group:leaves",
		"group:leaves",
		"group:leaves",
		"group:leaves",
		"group:leaves",
		"group:leaves"
	}
})

Considering this, a player can craft a fuel can from 27 leaves blocks with little processing time. In comparison the default setup from this mod produce a fuel can from 144 leaves blocks with some processing time.

To me, this mostly defeat the purpose of building and using a refinery for a player.

Now I'm unsure what could be the best approach to better balance this, other then removing the compatibility patch. But I'd like to argue this shortcut shouldn't be possible out-of-the-box with default settings.

Perhaps this could be balanced by introducing some kind of "purrifying" mechanic for alternate source of biofuel ?

[Lokrates]

There are several options in the settings menu to adjust the modification to your own preferences (Biomass input / Bottle output) . However, an optimal balance is still not possible.