I hate beating a dead horse and I've read all the old posts on this. My check coolant additive message just came on at 14k. My Ford dealer wants $25 to test it. I asked him if he would just sell me the strips and he said no. Any alternatives out there? I know that 25 bucks isn't very much, considering how much I paid [still paying] for my F-250. I just like doing things myself and thought this was a little much for the test. Fluid levels are fine. Any advise? Thanks, I'm new to the forum.