diff --git a/code/game/objects/random/food.dm b/code/game/objects/random/food.dm
index 64a95915110..2150e7136ce 100644
--- a/code/game/objects/random/food.dm
+++ b/code/game/objects/random/food.dm
@@ -273,3 +273,13 @@
 		/obj/item/reagent_containers/food/snacks/chocolate_bar/laughterbar = 1,
 		/obj/item/storage/box/fancy/readies
 	)
+
+/obj/random/cookingoil
+	name = "random cooking oil"
+	desc = "Has a 50% chance of spawning a tank of cooking oil, otherwise nothing."
+	icon = 'icons/obj/reagent_dispensers.dmi'
+	icon_state = "oiltank"
+	spawn_nothing_percentage = 50
+	spawnlist = list(
+		/obj/structure/reagent_dispensers/cookingoil
+	)
diff --git a/code/modules/cooking/machinery/cooking_machines/fryer.dm b/code/modules/cooking/machinery/cooking_machines/fryer.dm
index a26b2d82d25..115bf37a676 100644
--- a/code/modules/cooking/machinery/cooking_machines/fryer.dm
+++ b/code/modules/cooking/machinery/cooking_machines/fryer.dm
@@ -29,7 +29,7 @@
 		/obj/item/stock_parts/matter_bin = 2)
 
 	var/datum/reagents/oil
-	var/optimal_oil = 9000//90 litres of cooking oil
+	var/optimal_oil = 100 // 1/10 of a cooking oil tank
 
 /obj/structure/machinery/appliance/cooker/fryer/get_examine_text(mob/user, distance, is_adjacent, infix, suffix)
 	. = ..()
diff --git a/code/modules/reagents/reagent_containers/welding_backpack.dm b/code/modules/reagents/reagent_containers/welding_backpack.dm
index d5395a81518..0ce6de89ade 100644
--- a/code/modules/reagents/reagent_containers/welding_backpack.dm
+++ b/code/modules/reagents/reagent_containers/welding_backpack.dm
@@ -15,6 +15,16 @@
 	drop_sound = 'sound/items/drop/backpack.ogg'
 	pickup_sound = 'sound/items/pickup/backpack.ogg'
 
+/obj/item/reagent_containers/weldpack/Initialize(mapload)
+	var/turf/T = get_turf(src)
+	if(mapload && T && is_station_level(T.z))
+		// If the weldpack is spawned on a station level during map load, don't give it any fuel.
+		// This is in support of persistent welding fuel tanks and only for the persistent levels.
+		reagents_to_add = null
+		create_reagents(volume) // Ensure reagents datum is created, even if empty
+		update_volume()
+	. = ..() // After reagents_to_add is updated
+
 /obj/item/reagent_containers/weldpack/feedback_hints(mob/user, distance, is_adjacent)
 	. += ..()
 	if(ishuman(loc) && user != loc) // what if we want to sneak some reagents out of somewhere?
@@ -27,6 +37,20 @@
 	else
 		. += SPAN_WARNING("\The [src] is empty!")
 
+/obj/item/reagent_containers/weldpack/proc/update_volume()
+	var/fill_level = reagents.total_volume / volume
+	if(fill_level <= 0.1)
+		icon_state = "welderpack_low"
+		item_state = "welderpack_low"
+	else
+		icon_state = "welderpack"
+		item_state = "welderpack"
+	update_icon()
+	update_worn_icon()
+
+/obj/item/reagent_containers/weldpack/on_reagent_change()
+	update_volume()
+
 /obj/item/reagent_containers/weldpack/attackby(obj/item/attacking_item, mob/user)
 	if(attacking_item.tool_behaviour == TOOL_WRENCH)
 		if(atom_flags & ATOM_FLAG_OPEN_CONTAINER)
@@ -60,5 +84,6 @@
 			reagents.trans_type_to(attacking_item, /singleton/reagent/fuel, min(fuel_volume, T.reagents.maximum_volume - tool_fuel_volume))
 			to_chat(user, SPAN_NOTICE("Welder refilled!"))
 			playsound(loc, 'sound/effects/refill.ogg', 50, 1, -6)
+			update_volume()
 		return
 	return ..()
diff --git a/html/changelogs/fabiank3-empty-liquid-container.yml b/html/changelogs/fabiank3-empty-liquid-container.yml
new file mode 100644
index 00000000000..7b84a0a3a3f
--- /dev/null
+++ b/html/changelogs/fabiank3-empty-liquid-container.yml
@@ -0,0 +1,9 @@
+author: FabianK3
+
+delete-after: True
+
+changes:
+  - balance: "Welding packs (on the Horizon) now start empty to support persistent welding fuel tanks."
+  - imageadd: "Added a sprite for empty welding packs."
+  - balance: "Reduced the 'optimal' oil amount in the deep fryers from 9000u to 100u. One cooking oil tank can now be used multiple times instead of needing 9 tanks to refill it."
+  - rscadd: "Added a wrench to the kitchen to allow better handling of cooking oil tanks."
diff --git a/icons/obj/item/reagent_containers/weldpack.dmi b/icons/obj/item/reagent_containers/weldpack.dmi
index a6901e00104..46edef7bdc0 100644
Binary files a/icons/obj/item/reagent_containers/weldpack.dmi and b/icons/obj/item/reagent_containers/weldpack.dmi differ
diff --git a/maps/sccv_horizon/sccv_horizon.dmm b/maps/sccv_horizon/sccv_horizon.dmm
index 5ffde1d3760..8688a0962e3 100644
--- a/maps/sccv_horizon/sccv_horizon.dmm
+++ b/maps/sccv_horizon/sccv_horizon.dmm
@@ -59350,6 +59350,7 @@
 	pixel_x = -2;
 	pixel_y = 5
 	},
+/obj/item/wrench,
 /turf/simulated/floor/tiled/dark/full{
 	temperature = 278
 	},