Good info CFI.

The MD11 burns 18000 pph at high speed cruise (M.84-.85) in the low 30's. It burns 15000 pph at most econ settings (m.82-.83). If you really lean the mixture on it and/or fly it at high altitude -upper 30's low 40's you can get it down to 12000 pph (M.815-.82).