Hot oil as a weapon was very rare..due to cost and the danger it might have caused more damage to the users than the attackers ie, it would have caught fire easily.
There have been a lot of archeological tests done on the channels on castels that were presumed to have been used for such a weapon but all chemical tests have come up negative, the stonework would have absorbed the oil and even hundreds of years later it would have been detectable.
http://en.wikipedia.org/wiki/Early_thermal_weapons
They are recorded having used the following in a similar manner, hot water, sewage, molten lead, heated up sand, boiling tar.
Zitat von Valdemar
You may and it has been noted. Actually FSF, Finescalefactory did a very nice 1/72 scale set of this, but not sure if still available?
This one?;
http://www.fuhrmann-figuren-shop.de/epag...SF%20MA%2014%22