My gut hunch is you have no engine damage at all.. The reason I say that is you didn't take too long to deal with it, and if I remember right from your postings, you didn't drive too much with the light actually on. If the engine was so low as to really be a problem, you would almost certainly hear it. IE: noisy valves clacking, possible knocking, etc.. I don't think you noticed this, so I don't think it was ever totally out of oil. So I think most likely you didn't have any real damage, and with the warranty, you should be ok. If the engine did get messed up, it will already be sounding at least slightly different than it did before. If it still runs and sounds exactly the same as before, I wouldn't be too worried about it. MK