1500W consuming a lot of magenta

Is this normal? I have been using cone pigment inks for 2 years now and i find my Epson is eating a lot of magenta. Prints just fine, but magenta cartridge is always almost empty, even if status monitor thinks it should be 80% full. Got new cartridges a couple months ago but no change.

1430/1500 printers are very odd. With some of the printers the print-head last forever. With others, not long at all. Some of them vacuum ink un-evenly, some perfectly. I think it’s probably in your printer. It should not be running out of Magenta faster than everything else if you are printing a normal amount of magenta in your images.

-Walker

So im just going to continue filling up magenta every week as long as the prints are good?