RE:RE:RE:RE:Talking about Bombardier losing...Pierre, your rationale is reasonable and should not be disregarded. But also consider that commerial aircraft burn Jet A-1 or Jet B not crude oil. Due to taxes, production costs and cost of delivery there is no linear relationship between cost at the pump and upward/downward fluctuations in the price of a barrel of crude. Refined fuels also have their own set of market forces. This however was not really my point in my previous post, and maybe I didnt say it very well. It is that airlines operate on very tight margins, and no airline can afford not take advantage of opportunity to reduce discretionary operating costs such as which aircraft it purchases. They have to buy fuel regardless. Aircraft purchases are based on longterm profitability and overall lifecycle costs (CS-100s that have just entered serice will fly for 20-25 years). Up front, I agree, purchase costs for older generation aircraft will be cheaper. Bombardier on their website, does speak of the fuel saving, but also mentions the overall advantage in operating expense which is 15%. This is probably the number that really matters to a purchaser, as it would to be a lifecycle indicator that accounts for fuel price volitility.