Just wondering who it was that posted about changing their waterless coolant to find sludge. I never found out what brand it was. I am using evans cooling npg+ which is supposed to be lifetime coolant. (no water can be added) and should never need replacing. It seems to be holding up fine after a couple years but has anyone used this long term??

 

I posted about sludge in the coolant reservoir a couple of weeks ago. The coolant was Havoline Dexcool mixed 50% with distilled water. I don't blame the coolant. I just left it in too long. Certainly five maybe six years.