With all the recommendations this product gets, here and in the magazine, I thought I would give it a try.
This morning, while changing a headlight on my car I noticed that the coolant overflow "bottle" was empty. I checked the radiator and the coolant is the correct color and up to the correct level. So I went for a walk to get some more coolant for the overflow and at the first place I went to, they had a famous brand of green but the bottle said for 1989 or OLDER GM and Ford and 1990 and older foreign. My car is a foreign but is NEWER than 1990, so I kept walking. At Wally World I found the "correct" coolant (how long have they been putting the water in the mix for you?) but I don't shop at WW on general principle. So at Advance I found Water Wetter.
My question, sorry it took me so long, is this:
can I just add the W W and water mix to the overflow bottle? Or do I need to wait til the next coolant flush and add it into the "general" mix? Directions on the bottle say to "...add a few capfuls to a quart of water" or the whole bottle to a coolant system of 12 to 20 quarts. I feel stupid asking, but better safe than sorry.
BTW, car has always run just above 1/2 way on the temp gauge, but to my knowledge, never overheated.....at least not while I owned it, and I'm about to go on a very long interstate trip.

