Oh yeah one more thought, it could be your radiator cap might be jus
gettin old and wore and may need to be replaced. I had a buddy who had
overheating problems and coolant loss problems to. And it all came
down to his radiator cap. One more place to look is on the most bottom
part of your radiator. Where the lil fins part meet up with the bottom
part. Jus pop ur hood and look down towards the bottom of ur radiator.
Look for any coolant . Sometimes radiators get lil pin hole leaks that
very slowly let coolant seep out and over time a pint could easily be
lost.