Some Players have mentioned that they would like the Oil Barrel as either an Attack Unit or a Unit that uses Bombardment.
Questions To ALL:
IF I make the Oil Barrel as an Attack Unit... should it simply stay where it is transported on the map and if attacked show an animation for it that appears to be causing the Oil Barrel "injury" (leaking Oil and Smoking) then have it animated to Burn or Explode for its death OR should the Oil Barrel be animated to Roll to the "Enemy Target" and Explode to cause injury or death to the Enemy...Used like an Immobile Cruise Missile?
Naturally, if set up to appear as though the Oil Barrel is being "injured", the attacking enemy unit would also be injured during the "battle" so the animation would at least have Smoke and Oil that could help explain the Attacking Unit being injured or Killed.
IF set up as an immobile Cruise Missile, the Oil Barrel could be destroyed if attacked during the enemy turn but could roll to the enemy and explode or Burn to cause Death to the Enemy during its turn.
Both situations could show the Oil Barrel as stationary for the Default animation. Probably No Fidget unless someone has a good idea for what that might be without detracting from the fact that it is an Oil Barrel.
IF set as a Cruise Missile, it probably should not have more than 2 tiles distance for the Attack or it would appear Rather Funny Rolling over many cities, etc... to get to the enemy Bombardment Point

The Thing I don't like about setting the Oil Barrel Up as a sort of Normal Unit that is immobile...when it is Destroyed and it Burns or Explodes, that will appear as if it should injure or Kill the attacking Unit and it will injure the enemy unit during the "battle" althought it will not be exploding over and over...just smoking and leaking oil..
IF the Oil Barrel is set up as an immobile Cruise Missile, that will show the one time Burn or Explosion and it will injure ot Kill the enemy But Transportation will need to be an additional transport of some kind that is set up to transport Cruise Missiles. The AI will Not use such Transports on land and IF the Human Player has Cruise Missiles in their game, they would also be able to load in the New Transports.
Other than the Transportation issue if set as an Immobile Cruise Missile, the AI as well as Human players could simply use the Oil Barrels inside the Cities without transporting them for use. Of course the Oli Barrels would not be seen on the map...just over the Cities" before used for Bombarment. They could use Airports to be sent to another City for example and just Roll one or two tiles to Bombard the Enemy.
Any Opinions, Ideas or Thoughts are Welcome

Just kidding... although..... and I like the idea of it "roll[ing] to the enemy and explode[ing]" sounds great!