I fix cars for a living and yes Dexcool can be nasty stuff the same way guns can be deadly. If you don't read the instructions bad things happen. We have been using it in all water cooled Rotax motors for over 10 years, works fine. Overheating it and adding contaminants (like mineral laden water) will make it unhappy like all coolants. In the car world we don't see vary many Dexcool problems since the public (and repair shops) are up to speed. It only took 14 years.....