113312 From United States of America, joined Apr 2005, 508 posts, RR: 1 Reply 1, posted (6 years 5 months 1 week 5 days 8 hours ago) and read 3905 times:
It's been a while since I flew the DC8s but I will share some information. A DC8-61 will generally burn 3000-3500 pounds per hour per engine during cruise flight. The -50 series will consume generally the same. The -70 will burn less generally between 2500-2800 pounds per hour per engine. While this places the CFM engines at a clear advantage, the most significant difference is in the climb to altitude. I recall the -71 used 1/3 less fuel from takeoff to top of climb as compared to the -63 and was able to takeoff with less fuel at a lighter weight and then climb to a higher and more efficient altitude initially. The total net result was a considerable savings in fuel cost for a given flight with a given payload (passengers or cargo)