I have heard rumors that Dex-Cool isn't all its talked up to be. I hear that there are issues with gasket hardening and weakening along with corrosion to hoses and clamps. A buddy just went in and found all the hoses on his truck were shor and the mechanic said because the long change interval allows crystallization and impurities to stay circulating. He changed the pink to the green and said to flush it every 2 years. Anyone have problems or confirm the rumors. Any service bulletins out from the major manufacturers? Just curious.