its illegal on the strip but other than that, sounds like a winner! That Dex-cool about ruined my Suburban. Going on a multi state road trip and we pull into an Albuquerque service station running a little hot. Right as I'm about to pop the hood, the stat housing blows out and dex cool shoots everywhere UNDER the still closed hood. What the hell just happened? There was a 1" chunk of that PLASTIC housing that blew out and vented the hot coolant seconds before I would have opened the hood. Dans chemistry lesson proved right, that **** softened that plastic enought to grenade it. The rest of the housing was so brittle it just crumbled under my hand. Autozone next door had one in chrome (oooh!) and it bolted right on, added more dex-cool and completed our trip. Did a full flush and used gool ol' green prestone after that.