Hello.

In the patched versions of RTW V1.5 and BI V1.6 gates:

Pour oil:
- if you follow routers inside an enemy held gate
- if you try to force your way in though an enemy held gate
- on the enemy if you capture the gathouse and open the door to allow the enemy to pass through

Dont pour oil:
- if your spy disables/opens the gates before battle
- if you 100% destroy the gatehouse with artillery
- if your wall top running troops capture the gatehouse

Hope this forum doesnt mind but we were swapping lots of siege tactics, with pictures, in a campaign thread on another forum. Its Barbarian Invasion..but it works the same as RTW. Lots of pictures so members with slow downloaders beware...
http://rtw.heavengames.com/cgi-bin/f...8&st=20#post21