I hate to throw away perfectly good ink. I received a 251 gray ink cartridge for my MX922. Can I use it when my small black tank is empty?
I wouldn't because I want my color photo prints to have the contrast and color I've dialed in with editing software. I'd expect this would reduce contrast in dark areas of a photo or artpiece. For less critical print jobs, it might not matter. You could try it and see what you think. That's odd that Canon is shipping this printer with an ink tank it can't use!