Color ImageclassMF642: Toner running out at same time

[lspilde1205]

Why do all three of the colors of Toner for my ImageclassMF642 run out at the same time?  Was it designed that way?

[lspilde1205]

I will never cease to be amazed:  The day I run out of yellow toner is also the day I run out of magenta and cyan toner.  It is hard to believe I use the same amount of each color every time I print in color!!