Some fuel saving measures now studied by airlines are: -slower speeds to save 100kg of fuel at a 2 hour flight -lower flap setting for landing, requires less t

Some fuel saving measures now studied by airlines are: -slower speeds to save 100kg of fuel at a 2 hour flight -lower flap setting for landing, requires less thrust for the last 4 min of flight. But it requires more landing distance. -less water on the tanks for the toilets. 60kg less for 100 flights means a significa t saving. -ipads instead of 40 kilos of flight manuals for the cockpit. -taxing with only one engine (this is an old trick) -higher cruise level. -better radar control coordination. A direct vectors can save you minutes of flight. In aproach up to 10min -cleaner aircraft, to avoid drag. -adjusting the lubricating grease for the landing gear and flight controls. Excess uneccesary leaking grease means more weight. -lighter seats -lighter cabin apliances -even more important are newer aiplanes. It used to be normal seeing 20y/o+ airplanes flying in USA and Europe. Now anything older than 12 years is using 20% more fuel than newer versions. This is specially important for long haul airliners like jumbos a340, 767, 777 etc...