A B777-200ER powered by GE90-94B engines flying a 6,000nmi leg would consume 888 less US gallons of fuel than one powered by Trent 895 engines. That's in a three class aircraft configuration with 300 seats.
This year (2011) with average cost of fuel at 334c/gal this flight would cost US $2966 less with a GE than with a Trent engine. This would be a considerable cost saving spread over one year of flying.
...only if the GE kept running.
