1 pointMayhems Tubing and Coolant Guide for users. This will aid in choosing the right coolant for the right tubing. It is a very basic guide how ever accurate. All testing is done in house over long periods of time. Tubing can fail for many reasons but failure has scored it a negative mark. Some reason for failure include, Micro fracturing, Cracking, Shrinkage, Drying out and more.