I recently read an article in another magazine about Inkjet Cartridges. The gist of it was that your PC was telling you that your cartridge was empty a little early. I use a Lexmark X2350 which uses only one cartridge and yes it very quickly tells me my cartridge is empty. I last put a brand new Lexmark cartridge (No1) into the printer on March 27th and it is still printing photographs. Read into this what you may!
During the first week from new I printed 15 colour photos and in the region of 40 pages of A4 in black. I found that the photos used up nearly a half of the displayed ink, and the remainder of the printing nearly emptied the cartridge. Since then I`ve only printed about 15 sheets of A4 and another 20 colour photos, despite the warnings that the cartridge was empty. From the end of the first week in April I`ve apparently been running on `empty`. I don`t wish to claim a record for this, just to pass on the information that there`s a lot more ink in the cartridge than we expect.