Coke Oven

Introduction
A coke oven allows the creation of better fuel and also the creation of creosote oil without the usage of power.

Structure
A 3*3*3 hollow cube of coke oven bricks

Usage
You can use the coke oven to produce charcoal from logs and coal coke from coal (No, you can't make charcoal into coal coke)

Wood --> Charcoal

Coal --> Coal Coke

Cactus --> Cactus Coal --> Cactus Coke

Sugar Cane --> Sugar Coal --> Sugar Coke

By-Products
Creosote Oil is the by-product of using the coke oven. It has multiple uses:

good furnace fuel (being able to smelt 32 items per bucket)

decent fuel for your RC steam boilers (using buckets of creosote oil in the solid-fueled firebox seems to have a higher fuel efficiency than piping creosote oil into liquid-fueled firebox)

Fuel for combustion generator (the efficiency of it is kinda meh compared to other fuel source available in LV)

Distill into lubricant (not a very bad source of it considering you will end up with A LOT of creosote oil)

Caution
For all railcraft multiblocks, the fluid is saved on the center of the bottom layer of the multiblock (i.e. the coke oven bricks block on the middle of the bottom 3*3 layer). Breaking it or re-centering the broken multiblock using another brick as the center will void all the fluid contained within. (though if you find youtself unable to use all those creosote oil, it is backing up and you have nowhere to store it, then you can consider breaking that block to void all the excess creosote oil)