This idea started out as a comparison between regular RO and RO XL. I guess I went a little overboard   These are lumps that are readily available to me locally. The price listed is what I paid full retail without any discounts. It will probably take me into the summer to get all my comparisons completed. I'll update this thread as I go along.    RO (Royal Oak regular) - Walmart  $9.96 - 15.44 lbs   "Authentic all natural kiln made lump charcoal made from 100%