Now with the intro of the ULSD fuels, it seems to be safe, one should add some fuel additive or conditioner. My question is which is the best brand or type to consider? I know everyone has favorites and oppinions but in general I am looking for some good recommendations as to type and best place to purchase. A friend of mine and I are talking of going together and by a supply in bulk and split it up. Does anyone know of someplace that would discount a few cases or more if necessary to get a good price?