It amazes me how efficient Gulfstream is able to get this plane relative to its competition. Just dividing fuel capacity by range of this G650ER vs the Dassault 5X and 8X, it only uses 18%-19% more fuel per mile even while it weighs ~40% more at BOW and MTOW and flies higher, faster and much farther. And its RR engines are like 20 years old vs the clean sheet engines on the 5X. Mindboggling.