Low grade fuel is the gate on almost everything you want to do: your first furnace costs 50 of it, every unit of explosives costs 3, and your minicopter burns 30 a minute. Get it wrong early and you spend the first hour of a wipe stuck at a campfire while everyone else is smelting.
The good news is the recipe is free — 3 Animal Fat + 1 Cloth = 4 Low Grade Fuel, no workbench, known by default. The rest of this guide is about which source to lean on at each stage of the wipe.
Six sources, ranked by when they matter
| Source | Rate | Best for |
|---|---|---|
| Refine crude oil | 1 crude = 3 low grade | Bulk, once you have a refinery |
| Craft from animal fat | 3 fat + 1 cloth = 4 | Early game, no workbench needed |
| Red oil barrels | 5–10 low grade each | Free on roads, plus crude to refine |
| Outpost vending machine | ~20 for 10 scrap | Safe, instant, small amounts |
| Airdrops | 35–105 per drop | Random bonus, roughly 1 in 10 drops |
| Pump jack + refinery | ~350 per diesel | Late wipe, industrial scale |
Barrels are a constant background trickle you should never walk past. The Outpost machine is your emergency top-up. Airdrops are a bonus, not a plan. The two you actually build a wipe around are animal fat early and crude later.
Animal fat: the real bottleneck
Cloth is trivial — one per batch — so the entire cost of crafted low grade is animal fat. Use a bone knife; a hatchet or pickaxe cuts your yield.
| Animal | Animal fat | Rough low grade |
|---|---|---|
| Polar bear / Crocodile | 120 | ~160 |
| Bear / Tiger / Panther | 100 | ~133 |
| Boar / Shark | 40 | ~53 |
| Deer, Wolf, Horse, Snake | 10 | ~13 |
The maths is friendly: every unit of fat is worth about 1.33 low grade. One bear turns into roughly 133 low grade — nearly a full minicopter tank from a single kill. That is why the classic early-game fuel run is a hunting bow and a loop through the forest hitting every bear and boar you find.
One budget warning: animal fat also feeds candles (10 for a small set, 20 for a large) and cooking. The same stack that lights your base could have been a tank of minicopter fuel.
Refining crude oil
Once you are past the early game, refining beats crafting for raw volume.
- Place a Small Oil Refinery on open ground.
- Add wood to fuel the burner.
- Load crude oil into the input slots — there are three, so splitting your crude across all three refines about three times faster.
- Collect the output at a fixed 1 crude → 3 low grade, with charcoal as a by-product.
100 crude becomes 300 low grade. Public refineries exist at monuments such as the Dome and Outpost if you want to refine without placing your own.
If you are running a pump jack: one diesel barrel yields about 60 crude, which refines into 180 low grade. At monument pump jack scale, expect roughly 350 low grade per diesel fed.
What low grade actually powers
- Vehicles — minicopter (500 tank capacity, ~30/min, ~16m40s of flight), scrap transport helicopter, boats, RHIB, modular cars
- Tools — chainsaw and jackhammer, which trade fuel for drastically faster gathering. Hold low grade in your inventory and the tool draws from it as you run it.
- Base — lanterns and tuna can lamps, flame turret and flamethrower
- Crafting — a furnace costs 50 low grade, and every unit of explosives costs 3
Recycle values worth knowing
Not the most efficient route, but a free bonus while you are farming other things:
| Item | Low grade returned |
|---|---|
| Lantern | 3 |
| Tuna can lamp | 1 |
Mistakes that waste your fuel
- Crafting low grade before you have a furnace plan. You need 50 for your first furnace — prioritise that over everything else, because without it you cannot turn ore into metal fragments and you are hard-gated from your first workbench.
- Burning low grade to make charcoal. You cannot. Charcoal comes from burning wood in a furnace or campfire, or as a by-product of refining crude. Putting low grade in a furnace just wastes it.
- Using diesel where low grade belongs and vice versa. Diesel is loot-only and only fits heavy monument machines; low grade is the craftable one.
- Hunting with the wrong tool. A hatchet on a corpse gives noticeably less fat than a bone knife.
- Fighting bears without a plan. Early on, ring a dangerous animal with twig foundations so it cannot reach you, and bandage immediately — a bear hit bleeds.
Related guides
- How to Get Cloth Fast — the other half of the craft recipe
- How to Get Scrap Fast — barrels give crude and scrap together
- Rust Tech Tree Guide — what the furnace unlocks
- Oil Rig Guide — the offshore crate run