Fuel

**Fuel** is anything that is required for Flight Equipment to function. There are various types of fuel and each has its own fuel efficiency, for which there are 3 types:

* LOW
* MEDIUM
* HIGH

All fuel is obtained by crafting it in your Fabricator, but some can also be found as a drop in some Locations.

## Overview

Some fuel types are more efficient but considerably less cost effective to make, while others are remarkably cost effective but horribly less efficient in your engines. This article will go over each fuel efficiency type, and details what that efficiency means as well as the cost effectiveness of that fuel.

## Fuel List

* Biomass Fuel
* Energy Crystal Fuel
* Helium Fuel
* Synthetic Fuel

## Fuel Efficiency

Fuel efficiency will be defined as Seconds/Fuel, to tell us how long a single unit of fuel will give us in an Engine variant.
Engine uptime will be defined as the amount of time fuel will last, at maximum capacity in a normal(100 Fuel) or upgraded(200 Fuel) engine.
The source of the test and all numbers used, can be found here. All values given are rounded to the nearest tenth.

### LOW EFFICIENCY

Low efficiency fuels consists only of Synthetic Fuel. Testing showed 10 Low Efficiency fuel gave us an engine uptime of 33 seconds, giving us an efficiency rating of 3.3 Seconds/Fuel.

### MEDIUM EFFICIENCY

Medium efficiency fuels consist of Biomass Fuel and Helium Fuel. Testing showed 10 Medium Efficiency fuel gave us an engine uptime of 88 seconds, giving us an efficiency rating of 8.8 Seconds/Fuel.

### HIGH EFFICIENCY

High efficiency fuels consists only of Energy Crystal Fuel. Testing showed 10 High Efficiency fuel gave us an engine uptime of 175 seconds, giving us an efficiency rating of 17.5 Seconds/Fuel.

## Cost Effectiveness

For the sake of consistency, and since all fuel crafts in units of 50, all fuel crafts will be rounded up to the nearest whole as you cannot make half of a 50 unit fuel craft in your fabricator.

### Synthetic Fuel

At a glance, 1091 Fuel/Hour here may seem like a lot, but it equates to just 220 synthetics/hour, and with how easy it is to obtain synthetics early or late game, this price will likely be negligible for most players.

It may not be the most efficient, but it will probably be your go-to fuel craft if you run out in the middle of a storm.

### Helium Fuel

While remarkably cost effective due to Helium's ease of access, this will mostly go ignored as a fuel type until players have progressed significantly to the point they no longer need to upgrade their ship's lift capacity.

### Biomass Fuel

When farming is added later then this will be a slightly better option than synthetic fuel, but for now your only means to obtain Biomass is to go slicing around in a Greenhouse one knife swing at a time.

The water filtration aspect may also pose a problem to players in the early game, finding the space and materials to allow for an increased volume of water collection and filtration beyond the minimum to keep your character alive.

In the game's current state, this is the least effective fuel available to you.

### Energy Crystal Fuel

Strictly used as a late-game fuel since you can't access Energy Crystals until you have visited and farmed out Underdust locations, this is the most efficient fuel in the game, and the second most easily crafted.