I figured I could just look, but is there a certain level inside the radiator it should be at? Can there be too much? I'm used to having a resevoir to view.
The manual states 50/50 mix, but I've seen some people here say 70/30 mix.
A good level is probably 1-1/2 inches below the cap. The antifreeze mixture would depend on how cold you area gets in the winter. 50% antifreeze would be the maximum recommended.