FatJon

It's expensive, it's flammable, it has a lower heat capacity than water, it has slower heat transfer than water. You need to carry even more of it around with you in case you spring a minor leak, or contaminate it with water to get you home then buy it all over again. Its only use is if you have a snake that requires lubrication. Rather like stuff that "dissolves carbon" from your engine. Challenge the vendor to name one substance in which carbon is soluble other than molten iron.