This issue is I can't seem to keep anti-freeze in my radiator. No leaks that I can find, but it's going some where. Checked the Oil about 20 times so far and it's not showing up there. I'm currently breaking in a new engine so this makes it even more worrisome for me. Was wondering if anyone could help me brain storm this issue. My thought are it's leaking somewhere and evaporating, so it's not leaving a drop to find. Nothing dripping on the ground either. But I'm having to add fluid after every 2nd trip that's 30 miles or more. About 2 quarts so that seems signification to me. Jeep temp is running around 210 and above, but hasn't over heated, just much hotter than I want while trying to break in a engine.