I had the infamous gummy tan reidue in my 2002 Buick Century (3.1L only engine in Century), and some gritty crap all over the radiator neck and cap, and in the overflow--needless to say I was less than impressed. It was recommended to me by a local radiator shop to keep the Dex-Cool in until my warranty is up. What I am looking for is any suggestions from you guys as to my next step once my warranty is up. I was thinking about just geeting a flush and dfill with whatever green-stuff they carry, but I see a lot about this G-05, is it more compatible with the Dex-Cool in comparisson to the regular EG? ANy suggestion as to my next move once warranty is up would be appreciate, I do know the Dex-Cool is going, after that I am unsure. Thanks for any advice.