I think this is probably a dumb question...but here goes...
What with Covid 19 this year, we did not use “Big Bertha”... instead, we did some work around the house and to the Coach, thinking we would take a short trip right about now...
...then we got hit with some bad fires in Colorado which have closed many of the National Forest Campgrounds.
Here’s the dumb question...does the anti freeze “expire”? Does it need to be drained and replaced?