Whether you want to burn some other resource from the base game or add something else from your favourite mod to the fuel list, you can easily roll up your sleeves and make it happen yourself. You can use Windows' Notepad to open a .xml file, right? That's all you're going to need. Just follow this steps:

You'll need to know what's the "defName" you're adding. You can either:

A: Activate the development tools in-game, click on the magnifying glass tool, turn on the first button (Deep Inspection Mode) and hover your mouse over the resource you want to identify. Take note of what shows up on the second line, between <def> and </def>. Case matters, ok?

OR

B: Look it up inside the xml files. For the base game, those are typically in C:\Program Files (x86)\Steam\steamapps\common\RimWorld\Mods\Core\Defs\ThingDefs_Items.
If you're adding something from a mod, you can typically find its folder at C:\Program Files (x86)\Steam\steamapps\workshop\content\294100\[that number showing up on your mod's page address]\Defs\ThingDefs. There, look for a file named something like "resources" (devs can use whatever name they like here). You're looking for a <defName>NameOfThatThing</defName>, but its usually easier to find the friendly text on <label>, the next line. You gotta copy the NameOfThatThing on <defName>, though, that's your guy.

(Note: you can also add a whole category of things to the fuel list. In that case, you're looking for a ThingCategoryDef, usually in their own separate folders.)


1. Locate this mod's patch folder on your hard drive. Typically that's C:\Program Files (x86)\Steam\steamapps\workshop\content\294100\1823276856\Patches

2. On that folder, create a new text file and name it Patches_JustForMe.xml (NOT .txt, don't let windows fool you, turn on "File name extensions" to be sure). On that file, place the following code, replacing the spot I marked with []'s with the defName you identified before (remove the []'s, don't include <defName> and don't mess with anything else, ok?):


3. Restart the game and enjoy!

And welcome to the most easily moddable game there is!

Note that, if you're including something from another mod, your patch will generate an error message if that other mod is no longer active. Also, I recommend you backup your file, as steam might overwrite it with every update.

PS: Post your patch on a comment below! If it's for a specific mod, I'll include it on the next update.