Basic question I know, but I'm tired of doing the test strips and adding the DCA. I also need to change the lower radiator hose, so I'll prolly just do them all and put in a new thermostat too. I'm just asking does Walmart or Auto Zoo have this stuff? I don't recall seeing it before. Is one brand better than another? I could just go to the IH dealer in my town I suppose. But I'm not in a rush and won't be doing it any time soon, the green stuff in it is good and I just added a bottle of additive. But want to start gathering what I need, so I can wait if ordering it and having it shipped is an option to get what I need or if it's cheaper.