A storage room piled with round canisters in many colors in The Last Caretaker.

Fuel

Fuel & Storage Calculator

Count the barrels or bulk containers for your fuel and energy supply.

Update 5.5 containers; rocket amounts from before Update 03

How much do you need to store?

Enter an amount for each resource. Counts round up to whole containers; barrels and bulk containers are alternatives, not quantities to add together.

Enter a positive amount.

Enter a positive amount.

Enter a positive amount.

Enter a positive amount.

Enter a positive amount.

Enter a positive amount.

Enter a positive amount.

Enter a positive amount.

Recorded before Update 03; check your rocket console. The preset replaces all amounts and clears other resources.

Containers needed

Bulk Diesel Tank and Bulk Battery have disputed capacities. Both calculations are scenarios: use the reading shown by your own container. No capacity is selected as the default.

Barrel counts and alternative bulk-container counts for each resource
Diesel

0 × Diesel Barrel

Capacity: 500 L

Skill Tier 12 · 2 points · No quest requirement recorded

Capacity & unlock details

0 × Bulk Diesel Tank

If capacity is 6000 L

Skill cards · 2026-09-02.

0 × Bulk Diesel Tank

If capacity is 10000 L

Crafting screen · 2026-09-03.

Skill Tier 26 · 3 points · Quest: MOSES Field Reserve Program

Capacity & unlock details
Petrol

0 × Petrol Barrel

Capacity: 500 L

Skill Tier 13 · 2 points · No quest requirement recorded

Capacity & unlock details

0 × Bulk Petrol Tank

Capacity: 6000 L

Skill Tier 27 · 3 points · Quest: MOSES Field Reserve Program

Capacity & unlock details
Crude oil

0 × Oil Barrel

Capacity: 500 L

Skill Tier 16 · 2 points · No quest requirement recorded

Capacity & unlock details
No bulk option included.
Fresh water

0 × Fresh Water Barrel

Capacity: 500 L

Skill Tier 14 · 2 points · No quest requirement recorded

Capacity & unlock details
No bulk option included.
Oxygen

0 × Oxygen Barrel

Capacity: 500 L

Skill Tier 17 · 2 points · No quest requirement recorded

Capacity & unlock details
No bulk option included.
Methane

0 × Methane Barrel

Capacity: 500 L

Skill Tier 18 · 2 points · No quest requirement recorded

Capacity & unlock details
No bulk option included.
CO2

0 × CO2 Barrel

Capacity: 500 L

Skill Tier 19 · 2 points · No quest requirement recorded

Capacity & unlock details
No bulk option included.
Electricity

0 × Battery Barrel

Capacity: 1.0 kWh

Skill Tier 11 · 2 points · No quest requirement recorded

Capacity & unlock details

0 × Bulk Battery

If capacity is 18.0 kWh

Skill cards; official stream agrees on September 5, 2026 · 2026-09-02.

0 × Bulk Battery

If capacity is 20.0 kWh

Crafting screen (September 3) and placed battery (September 16) · 2026-09-03.

Skill Tier 24 · 3 points · Quest: MOSES Field Reserve Program

Capacity & unlock details

Data Status

Container capacities and skill tiers were checked on 2026-10-06 against the official stream, skill cards and the wiki. They cover Update 5.5, including the labeled test build.

Bulk Diesel Tank and Bulk Battery each have two recorded capacity readings. Both are shown with their dates; Bulk Battery readings are 18.0 kWh and 20.0 kWh. Their calculations are comparisons, not fixed capacities. Check the container in your game.

The rocket preset uses console readings from before Update 03.

Where each fuel comes from

These production routes were reviewed on 2026-10-06. No filling-time estimate is calculated. The reviewed fuel references do not establish a fresh-water source.

Reviewed fuel origins and related guides
ResourceWhere it comes from
Crude oil

Collect oil from the oil pump at Black Vein Station, process spare materials in a Recovery Grinder, or have Project Jonah whales retrieve oil from the seabed.

Diesel & petrol

A Distillation Tower (skill Tier 20) uses crude oil and electricity to make diesel and petrol. Leave storage available for both outputs: if either fills up, the tower stops.

CO2 & electricity

A Large Electric Generator consumes petrol and produces electricity and CO2.

Oxygen & methane

A Sabatier Reactor (skill Tier 16) takes fresh water, CO2 and electricity and produces oxygen and methane.

For the related fuel-conservation module, read the Conservation Coil guide.

Fuel & storage FAQ

How much does each barrel hold?

Each reviewed liquid or gas barrel holds 500 L: Diesel, Petrol, Oil, Fresh Water, Oxygen, Methane and CO2. Battery Barrel holds 1.0 kWh. Container evidence was checked on 2026-10-06.

Why does the Bulk Diesel Tank show two capacities?

The September 2, 2026 skill card shows 6000 L, while a September 3 crafting screen shows 10000 L. Bulk Battery likewise has 18.0 kWh and 20.0 kWh readings. The developer said capacities were being adjusted on September 5. Both scenarios are shown without a default; check your own container before choosing a count.

How much fuel does a rocket launch need?

The reviewed rocket consoles show Oxygen 12000 L, Methane 3000 L and Electricity 60 kWh. These readings are from December 19, 2025 and February 9, 2026, before Update 03. Recorded before Update 03; check your rocket console.

Which containers need a quest?

Bulk Petrol Tank, Bulk Diesel Tank, Bulk Battery require MOSES Field Reserve Program. Each also has its own skill tier requirement and a 3-point blueprint unlock cost, confirmed on the skill cards.

Container details

Skill tiers are player unlock levels, separate from a container’s class. All entries were reviewed on 2026-10-06.

Diesel Barrel

500 L · Official developer stream

Skill Tier 12 · 2 points

No quest requirement recorded.

Petrol Barrel

500 L · Container screen

Skill Tier 13 · 2 points

No quest requirement recorded.

Oil Barrel

500 L · Container screen

Skill Tier 16 · 2 points

No quest requirement recorded.

Fresh Water Barrel

500 L · Container screen

Skill Tier 14 · 2 points

No quest requirement recorded.

Oxygen Barrel

500 L · Container screen

Skill Tier 17 · 2 points

No quest requirement recorded.

Methane Barrel

500 L · Container screen

Skill Tier 18 · 2 points

No quest requirement recorded.

CO2 Barrel

500 L · Container screen

Skill Tier 19 · 2 points

No quest requirement recorded.

Battery Barrel

1.0 kWh · Container screen

Skill Tier 11 · 2 points

No quest requirement recorded.

Bulk Petrol Tank

6000 L · Official developer stream

Skill Tier 27 · 3 points

Quest: MOSES Field Reserve Program

Bulk Diesel Tank — capacity disputed

6000 L · Skill cards

10000 L · Crafting screen

Comparison scenario only.

Skill Tier 26 · 3 points

Quest: MOSES Field Reserve Program

Bulk Battery — capacity disputed

18.0 kWh · Skill cards; official stream agrees on September 5, 2026

20.0 kWh · Crafting screen (September 3) and placed battery (September 16)

Skill Tier 24 · 3 points

Quest: MOSES Field Reserve Program

Rocket amounts & capacity adjustments

Recorded December 19, 2025 and February 9, 2026, before Update 03. The developer discussed adjusting container capacities in the September 5, 2026 stream.

Official sources and wiki