I have a 2006 RAV4 and it has 81k miles on it. We drove it up from south Florida to norther Alabama which is about 13-14 hours. It did fine the whole way until the very end when we started going over mountains and it began over heating. We were only 15 min away from home so we just put the heat on full blast and drove slower. I had my boyfriend look at the coolant levels last week and he said there was almost none at all. He put some water in it for now. I'm pretty sure the mechanic in Florida replaced the coolant before we drove it here but I'm not positive. I'm also supposed to drive to Atlanta next week which is only 120 miles or so but my mother is very worried that it is going to overheat and breakdown on the way. Any advice/ is it normal to have to replace coolant after 1500 miles/ should I go buy some and fill it up? Thanks!