I noticed that my resevoir tank on the Raptor is low in coolant. I lost my manual to tell how suppoed to fill. Also how often do you all drain all the antifreeze add new? I thibnk I need to do it. Whats best way to do.

 

Just pour in new anti freeze in a 50/50 mix with distilled water to the fill line in the res. Run it for a while & check it add more if needed.

Every other year is prob a good time to change it.