Minion Fuel

Minion fuels are items that can be used to speed up the production rate of Minions. These fuels can last for either a limited amount of time, or an infinite amount of time.

How to apply fuel

 * 1) Right-click the minion.
 * 2) On the left side, there will be a vertical bar with 5 slots.
 * 3) Put the fuel of choice in the top orange slot.
 * 4) Select the fuel from the hotbar and left click on the top orange slot.
 * 5) Done!

Types of fuel
A list of all the fuels in the game, including how long they last for (real-time) and how much the minion is sped up by. Special usage column indicates when the fuel affects the efficiency of the minion.
 * Remember
 * Minion action times are not decreased by the same percent as shown in table. For more information, see Minion Fuel & Calculations.

Calculations
Although fuels have their speeds shown in the tooltip, it is not exactly as it seems. This is because it does not directly reduce the action times by X%; it instead calculates how fast a minion needs for it to produce X% more items a second.

Fuel Efficiency
Fuel efficiency is the relationship fuel speed has on decreasing the cooldown (time between actions) of a minion. Minion Fuel speed does not have a linear impact on fuel efficiency, and instead the efficiency decreases along with the increase of the speed bonus. To calculate Fuel efficiency, use this formula:

$$FuelEfficiency = \frac{1}{1 + FuelSpeed}$$
 * Note
 * Fuel Speed should be converted from percent value to a fraction.

Example
Example calculation for Foul Flesh:
 * Information
 * $$FuelSpeed = 90%$$


 * Calculation
 * $$FuelEfficiency = \frac{1}{1 + 0.9} = \frac{1}{1.9} \approx 0.526 \approx 52.6%$$

Minion Cooldown
The new cooldown can be calculated using this formula:

$$NewCooldown= Cooldown \times FuelEfficiency$$

or this, the most basic formula:

$$NewCooldown= Cooldown \times \frac{1}{1 + FuelSpeed}$$

Example
Example calculation for Clay Minion tier XI with Enchanted Lava Bucket:
 * Information
 * $$Cooldown = 16$$
 * $$FuelSpeed = 25%$$


 * Calculation
 * $$NewCooldown= 16 \times \frac{1}{1 + 0.25} = 16 \times \frac{1}{1.25} = 16 \times 0.8 = 12.8$$&#32;seconds

Tips

 * Keep in mind that when a minion fuel is inside a minion, it cannot be reclaimed unless it has an infinite duration (Enchanted Lava Bucket / Magma Bucket / Plasma Bucket / Solar Panel).
 * Minion fuel is stackable and will allow the player to extend the fuel time.
 * The duration shown in-game used to be in-game time before version 0.7. It is now real-time. However, the duration itself didn't change.
 * Fuel will be used even when the player is not playing.
 * If the player picks up a Minion that has fuel, the fuel will be destroyed unless it is an infinite fuel, in which case it could be removed from the Minion anyway without being destroyed.
 * The solar panel can be used with a Day Saver, making it just as powerful as an Enchanted Lava Bucket. However, this works only when the player's island is loaded.
 * It is a very common misconception that time between actions will be reduced by X%. X% speed means Y% reduced time of the actions themselves. For example, if it takes the minion 40 seconds to get 1 piece of coal, it will take the coal minion 8 seconds less when using an enchanted lava bucket, as the enchanted lava bucket increases production speed by 25% (in turn decreasing time between actions by 20%).
 * For new players, it might be worthy to constantly fill up their minions with Enchanted Bread as it gives them a 5% boost for just ~100 coins per day.
 * The Enchanted Lava Bucket is rather expensive fuel that takes a long time to pay off. However, if the player doesn't plan to use higher tier fuels such as Hamster Wheels or Catalysts, it is usually a positive investment.
 * Fuels work with Floating Crystals.
 * Fuels and other speed-increasing upgrades are additive, rather than multiplicative. For example, the formula for a Fishing Minion XI with an Enchanted Lava Bucket and a Minion Expander will be $$NewCooldown= 35 \times \frac{1}{1 + 0.3} = 26.9$$ because 0.25 (Enchanted Lava Bucket's speed increase) plus 0.5 (Minion Expander) equals 0.3.

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