So I'm curious. Since I've bought my Jeep I've had to fill the coolant reservoir one time already (about a year ago) and now I have to fill it again as the coolant is below the MIN line. This will be the second time i've had to add coolant and I have 56,000 miles on the Jeep. Is this a normal thing or do I have a leak somewhere? I do my oil changes and the old oil looks fine and i've not seen any spots under my Jeep when I park of something leaking. So what do you al think. Normal or not?