[Rick Lee]

2008 Hyundai Santa Fe, 105k miles

Two mos. ago while doing my last oil change I noticed the coolant reservoir looked empty. I opened it up and it looked bone dry. I filled it up with 50/50. Just checked again, and it was down to the minimum level line. I checked the oil dipstick. No foam, oil looked as clean as honey. Car doesn't smoke, engine temp gauge never goes above about 40%, no leaks under the hood or car, no crusted antifreeze stained around engine. Where is this coolant going and what's causing it?