diff --git a/Resources/Prototypes/Catalog/Fills/Items/gas_tanks.yml b/Resources/Prototypes/Catalog/Fills/Items/gas_tanks.yml
index 8614319bf2..4dd9608e2b 100644
--- a/Resources/Prototypes/Catalog/Fills/Items/gas_tanks.yml
+++ b/Resources/Prototypes/Catalog/Fills/Items/gas_tanks.yml
@@ -40,6 +40,7 @@
   suffix: Filled
   components: *oxyTankFill
 
+
 - type: entity
   id: EmergencyOxygenTankFilled
   parent: EmergencyOxygenTank
@@ -62,13 +63,14 @@
   - type: GasTank
     outputPressure: 21.3
     air:
-      # 9 minutes
-      volume: 1.5
+      # 4 minutes
+      volume: 0.66
       moles:
         - 0 # oxygen
-        - 0.615413715 #nitrogen
+        - 0.270782035 # nitrogen
       temperature: 293.15
 
+
 - type: entity
   id: ExtendedEmergencyOxygenTankFilled
   parent: ExtendedEmergencyOxygenTank
@@ -128,6 +130,7 @@
         - 1.025689525 # nitrogen
       temperature: 293.15
 
+
 - type: entity
   id: AirTankFilled
   parent: AirTank