Index: trunk/data/defaultpresets.xml
===================================================================
--- trunk/data/defaultpresets.xml	(revision 4123)
+++ trunk/data/defaultpresets.xml	(revision 4124)
@@ -3096,5 +3096,5 @@
             <label text="Edit Power Generator" />
             <key key="power" value="generator" />
-            <combo key="power_source" text="Type" values="wind,hydro,fossil,nuclear,coal,photovoltaic,gas" default="" />
+            <combo key="power_source" text="Type" values="wind,hydro,fossil,nuclear,coal,photovoltaic,gas,oil" default="" />
             <text key="name" text="Name" default="" delete_if_empty="true" />
         </item>