EconoMode is a feature that allows the product to use less toner per page. Selecting this option can extend the life of the toner supply and can reduce cost per page. However, it also reduces print quality. The printed image is lighter, but it is adequate for printing drafts or proofs. HP does not recommend full-time use of EconoMode. If EconoMode is used full-time, it is possible that the toner supply will outlast the mechanical parts in the print cartridge. If print quality begins to degrade under these circumstances, you will need to install a new print cartridge, even if toner remains in the cartridge.