The friend who I turned on to this stuff has done it, no discernible difference... And No melting nothing... :-D

Sorry for the thread-jack.

is dot3 flamable? i hear that waterless coolants are banned from some racing leagues because of that.

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General George - 1967 Land Rover 2a SWB 1983 OM617 Turbo

Antifreeze in general is banned from sanctioned motorsports, because it's very slippery when it spills on an asphalt track, and doesn't quickly air dry the way water does. That includes waterless coolants as well as standard 5050.

The flashpoint of pure glycols is around 220F, within the expected operating range of NPG. This is one reason why auto manufacturers haven't adopted it. While you can ignite a 5050 mix, it's really hard to do. If you look at your coolant plumbing, and think about ignition sources and fire, you'll realize that there's a fair amount of engineering that would have to go into the car to make it safer to run with a flammable coolant...on a Merc, the water pump nestles under the exhaust manifold, the heater lines are adjacent to the turbo, and the heater core practically sits in your lap.