I had it in my 00 for about 11mo. before I sold it. No problems. I went to a 4# cap like they told me, and never had to add any fluid. I used the NPG+. I will be changing my 03 over to it next spring. With the hi egt's I was running while towing, my water temps would get to 220* to 230*, after the Evans, I never saw over 210*.
Larry