Long life antifreeze formulations are designed for extended life service in Over-The-Road and Off-road diesel engines. Sub-Zero Long Life Coolants are comparable to other nationally recognized long life antifreeze formulations. Years of field tests in mining equipment utilized in the states of Kentucky, Ohio, Virginia, and West Virginia have proven this commercial coolant to be a viable alternative to its often over-priced counterparts . Sub-Zero LLC-50 is supported by a comprehensive fluid testing program made available through the laboratories of Thermal Fluid Technologies. For more information please click on the contact us link.