On this page
- Quick Answer
- Quick Facts
- Requirements
- Grenade Timeline
- Oil, Ignition and Ground States
- Ground Effects
- Debuff Analysis: What Oil Actually Does
- Support Compatibility
- Support Loadouts
- Skill Interactions
- Mapping Rotation
- Bossing Rotation
- Build Usage
- Troubleshooting
- Community Evidence
- Video Walkthrough and Timestamps
- Sources and Verification
- Patch History
- Changelog
Quick Answer
Oil Grenade does two things: it coats enemies in oil (Slow + increased Fire Damage taken) and it leaves an Oil Ground patch.
The big payoff is ignition. When a Fire skill ignites the Oil Ground, the patch burns and deals Fire Damage, and part of that Fire Damage is added into your Ignite on enemies standing in it.
Oil does not simply lower Fire Resistance. It is a debuff that makes oiled enemies take more Fire Damage and moves slowly; the damage comes from igniting the ground, not from a resistance shred.
Quick Facts
- Category
- Grenade / Fire / Debuff
- Tagged attack, grenade, fire, ailment, debuff.
- Oil debuff
- Slow + increased Fire Damage taken
- Oiled enemies are slowed and take more fire damage from your hits.
- Oil Ground
- Leave a ground patch
- The patch can be ignited to burn and add fire damage to Ignite.
- Acquisition
- Uncut Skill Gem (Tier 4)
- Obtained from an Uncut Skill Gem; sockets into a crossbow skill slot.
- Best role
- Fire setup debuff + ignite layer
- Pairs with fire skills; weak as a standalone damage skill.
Requirements
No special attribute gate. The skill throws a grenade on a cooldown; you need a Fire skill to ignite the Oil Ground for the real payoff.
Because it is a grenade, it shares the grenade cooldown with other grenades on the same button group — throwing Oil Grenade starts that cooldown.
- Fire skill to ignite
- Required for payoff
- Without ignition the Oil Ground just slows; no burn damage.
- Grenade cooldown
- Shared with other grenades
- Plan grenade order around the cooldown.
Grenade Timeline
The lifecycle is: throw the bottle → it shatters on impact → enemies hit are oiled (Slow + increased Fire Damage taken) and an Oil Ground appears where it landed.
While the Oil Ground lasts, enemies standing in it are oiled. When a Fire skill ignites the ground, it begins burning and deals Fire Damage, and that burning adds part of its Fire Damage into any Ignite on those enemies.
The Oil Ground expires on its own after its duration, or is consumed by ignition. Managing the window — oil first, then ignite while enemies are still in the patch — is the whole skill.
- Throw → shatter → oil debuff + Oil Ground.
- Ignite the ground → burn + added Fire Damage to Ignite.
- Ground expires or is consumed by ignition.
Oil, Ignition and Ground States
| State | What it does | How to reach it | Damage source |
|---|---|---|---|
| Oiled enemy | Slow + increased Fire Damage taken | Grenade hit | Your follow-up fire hits |
| Oil Ground | Patch that oils enemies standing in it | Grenade lands | None by itself |
| Ignited Oil Ground | Burns, deals Fire Damage, adds to Ignite | Fire skill ignites the patch | The burning ground |
| Expired | Effect ends | Duration runs out or consumed | None |
Ground Effects
| Effect | From Oil Grenade | From Ignition | Note |
|---|---|---|---|
| Slow | Yes (oiled enemies) | No | Comes from the oil debuff, not the fire |
| Increased Fire Damage taken | Yes (oiled enemies) | No | This is the 'more fire damage taken', not a resistance cut |
| Burning Fire Damage | No | Yes (ignited ground) | The main damage payoff |
| Added to Ignite | No | Yes (ignited ground) | Part of the burn feeds your Ignite |
Debuff Analysis: What Oil Actually Does
Oil Grenade's debuff is not a Fire Resistance shred. It makes oiled enemies take increased Fire Damage (a 'more fire damage taken' effect) and Slows them. Both help a Fire build but neither is a resistance cut.
The Slow is valuable on its own for kiting and for keeping enemies in the Oil Ground so your ignition lands. The increased Fire Damage taken amplifies every fire hit you land while they are oiled.
This is why Oil Grenade is a setup skill: it prepares the enemy and the ground, then your Fire skills (and the ignited ground) do the damage. Used alone it barely hurts.
- Oil = increased Fire Damage taken + Slow, not resistance shred.
- Slow keeps enemies in the patch for ignition.
- It is a setup skill, not a damage skill alone.
Support Compatibility
Supports should extend the ground (Duration), widen the patch (Area), shorten the cooldown, or add fire/area scaling. The skill's own hit is minor, so direct-hit supports are low priority.
- Increased Duration
- Recommended
- Keeps the Oil Ground alive long enough to ignite.
- Magnified / Area supports
- Recommended
- Bigger patch covers more enemies for oil + ignite.
- Cooldown Recovery
- Situational
- Lets you oil more often; shares grenade cooldown.
- Fire/Area damage supports
- Situational
- Scale the ignited burn if supported.
Support Loadouts
A setup-focused loadout keeps the ground available and wide; damage scaling lives on your Fire skills.
- Setup loadoutSocket Duration, Area and Cooldown Recovery on Oil Grenade.Longer, wider, more frequent Oil Ground.
- Ignition skillsScale your Fire skills (Incendiary Shot / Fire spell) for the burn.The ignited ground deals real damage.
Skill Interactions
Explosive Shot / Explosive Grenade: if they deal Fire Damage they ignite the Oil Ground; otherwise they just hit. They do not 'waste' the oil, but the ignition specifically needs a fire source.
Gas Grenade + Ignite: a common combo — Gas Grenade then Oil, then a fire skill, layering poison and fire in the same patch.
Incendiary Shot: a direct fire crossbow skill that ignites the Oil Ground cleanly for crossbow Fire builds.
- Fire-dealing hits ignite the ground; non-fire hits do not.
- Gas Grenade layers with Oil for poison + fire.
- Incendiary Shot is the crossbow ignition tool.
Mapping Rotation
In maps, oil packs and ignite them as you move. The Slow keeps enemies grouped, and the burning ground clears the stragglers.
- Oil the packThrow Oil Grenade into the group.Enemies are oiled and Slowed; Oil Ground appears.
- IgniteHit the patch with a Fire skill.Ground burns; added Fire Damage to Ignite.
Bossing Rotation
On bosses, Oil Grenade is a debuff layer: oil the boss for Slow + increased Fire Damage taken, then keep Fire skills on it. You usually do not need to keep the Oil Ground refreshed constantly — one good oil application during the fire window is enough.
- Oil the bossThrow Oil Grenade at the boss as it becomes targetable.Boss is Slowed and takes more Fire Damage.
- Fire windowSpam Fire skills while oiled; ignite the patch if the boss stands in it.Maximum fire damage during the window.
Build Usage
Fire Gemling / Smith of Kitava: Oil Grenade is the debuff layer in a fire grenade or fire attack pile, paired with Explosive Grenade and Incendiary Shot.
Crossbow fire builds: any build already running Fire skills uses Oil Grenade to amplify them via increased Fire Damage taken and the ignited ground.
Bossing fire setups: Oil Grenade's Slow also helps melee fire builds stick to the boss.
- Fire Gemling: oil + explode + ignite stack.
- Any fire crossbow: amplify with oil.
- Boss fire: Slow helps uptime.
Troubleshooting
No burn damage: you never ignited the ground. Direct answer: hit the Oil Ground with a Fire skill; a non-fire hit will not ignite it.
Enemy not taking more fire damage: the oil debuff expired. Direct answer: reapply Oil Grenade; the increased Fire Damage taken is tied to the oiled state.
Grenade on cooldown when needed: you threw another grenade first. Direct answer: plan grenade order; Oil Grenade shares the grenade cooldown.
Boss barely hurt: Oil Grenade alone is a setup, not damage. Direct answer: follow with Fire skills and ignite the patch.
- No ignitionUse a Fire skill on the Oil Ground.Ground burns and adds to Ignite.
- Oil expiredReapply Oil Grenade before the fire window.Increased Fire Damage taken is active.
- Cooldown clashSequence grenades; don't pre-throw.Oil ready when needed.
Community Evidence
Players consistently report Oil Grenade feeling weak until they realise the ignition step is required — the ground must be set on fire for the damage.
The 'does it lower Fire Resistance?' question is common; the answer players settle on is increased Fire Damage taken plus Slow, not a resistance cut.
After the 0.4 buffs (shorter cooldown, longer ground, stronger attack damage, stronger ignite addition) the skill is treated as a core fire-setup tool rather than a niche pick.
- Recurring issue: forgot to ignite the ground.
- Recurring question: oil = more fire damage taken, not res shred.
- 0.4 buffs made it a fire-core tool.
Video Walkthrough and Timestamps
Moxsx
Hellfire Gemling — Screen-Wide Clear
A Fire Gemling build using Oil Grenade as the oil/ignite layer alongside other fire skills for screen-wide clear and boss damage.
What to watch for: Watch how the oil debuff plus ignition amplifies the fire damage.
Open source ↗Pvn0vs9LE8c author
Explosive Grenade Build (Gemling)
A Gemling grenade build showing grenade ordering and fire setup that pairs naturally with Oil Grenade's oil layer.
What to watch for: Watch the grenade cooldown order and how fire setups layer.
Open source ↗Sources and Verification
GGG official Patch Notes confirming the 0.4 Oil Grenade buffs (cooldown, ground duration, attack damage, ignite addition, Slow) and current 0.5.4 behaviour.
PoE2DB and Community Wiki provide skill id, tags, oil debuff, Oil Ground and ignite behaviour.
Mobalytics / YouTube Fire Gemling builds used to cross-check the oil + ignite layering and boss usage.
Reddit and forums surface the 'no damage' and 'fire resistance' confusion, reproduced on client and answered directly.
Official GGG forums where staff confirm grenade and ground-effect mechanics.
Reddit r/PathOfExile2 discussions for Oil Grenade and fire builds.
Patch History
- 0.4.0 (2025-09): Shortened cooldown; increased Oil and Oil Ground duration; increased Attack Damage; ignited Oil Ground adds part of its Fire Damage to Ignite; increased Slow.
- 0.5.4 (2026-08): Current baseline: oil debuff (Slow + increased Fire Damage taken) plus ignitable Oil Ground that burns and adds to Ignite.
Changelog
- Initial release: oil debuff vs Oil Ground, ignition states, debuff analysis, support matrix, skill interactions, mapping and boss rotations, troubleshooting and community questions.
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