That assumes normal use, not leaving the cartridge out of the printer for days and letting the ink path dry up. This is based on taking six printers, three running OEM ink only, and three printers running a quality after market ink after the initial OEM runs out. Next tested several bath tub inks and found that you can have problems after several cartridges, if not sooner. Suppliers like Coates, Nukote, Pelican, Formulabs, Reink, Turbon, American IJ, Graphic Utilities and several others are quality ink manufacturers. Add in the bath tub version and all bets are off.
Buyer be ware.