diff --git a/plugins/zorweth-paper/src/main/java/net/civmc/zorweth/flight/LaunchHandler.java b/plugins/zorweth-paper/src/main/java/net/civmc/zorweth/flight/LaunchHandler.java
index ef12f68a2..501780f7e 100644
--- a/plugins/zorweth-paper/src/main/java/net/civmc/zorweth/flight/LaunchHandler.java
+++ b/plugins/zorweth-paper/src/main/java/net/civmc/zorweth/flight/LaunchHandler.java
@@ -16,6 +16,7 @@ import java.util.UUID;
 import java.util.logging.Level;
 import net.civmc.zorweth.RocketTransferKeys;
 import net.civmc.zorweth.ZorwethPlugin;
+import net.civmc.zorweth.mechanics.Fuel;
 import net.civmc.zorweth.transfer.RocketBlockPosition;
 import net.civmc.zorweth.transfer.RocketChestTransfer;
 import net.civmc.zorweth.transfer.RocketEntityPosition;
@@ -153,6 +154,8 @@ public class LaunchHandler {
             double itemMass = itemAmount / (double) item.getMaxStackSize();
             if (FlightComputer.isFuel(item)) {
                 itemMass = itemAmount * FUEL_ITEM_MASS_KG;
+            } else if (Fuel.isCrudeOil(item)) {
+                itemMass = itemAmount * Fuel.CRUDE_OIL_ITEM_MASS_KG;
             }
             mass += itemMass;
         }
diff --git a/plugins/zorweth-paper/src/main/java/net/civmc/zorweth/mechanics/Fuel.java b/plugins/zorweth-paper/src/main/java/net/civmc/zorweth/mechanics/Fuel.java
index 3a067548c..9f56c0192 100644
--- a/plugins/zorweth-paper/src/main/java/net/civmc/zorweth/mechanics/Fuel.java
+++ b/plugins/zorweth-paper/src/main/java/net/civmc/zorweth/mechanics/Fuel.java
@@ -13,6 +13,8 @@ import vg.civcraft.mc.civmodcore.inventory.CustomItem;
 
 public class Fuel {
 
+    public static final double CRUDE_OIL_ITEM_MASS_KG = 0.5;
+
     public static void registerCustomItems() {
         createCrudeOil();
         createRocketFuel();
@@ -25,7 +27,8 @@ public class Fuel {
         ItemMeta meta = item.getItemMeta();
         meta.itemName(Component.text("Crude Oil", TextColor.color(64, 52, 40)));
         meta.lore(List.of(Component.text("It smells pretty noxious.", NamedTextColor.WHITE),
-            Component.text("Can be refined to rocket fuel.", NamedTextColor.WHITE)));
+            Component.text("Can be refined to rocket fuel.", NamedTextColor.WHITE),
+            Component.text("Each item weighs 0.5 kg in rockets.", NamedTextColor.WHITE)));
         meta.setEnchantmentGlintOverride(true);
         item.setItemMeta(meta);
         CustomItem.registerCustomItem("crude_oil", item);
@@ -62,4 +65,8 @@ public class Fuel {
     public static boolean isRocketFuel(final ItemStack item) {
         return CustomItem.isCustomItem(item, "rocket_fuel");
     }
+
+    public static boolean isCrudeOil(final ItemStack item) {
+        return CustomItem.isCustomItem(item, "crude_oil");
+    }
 }