zcrew New member Aug 20, 2014 #21 I also tried it in an older vehicle adding to pure water in the past and it seemed to keep it a few degrees cooler. I only kept it through a summer and drained it, then refilled with 50/50 before selling it.
I also tried it in an older vehicle adding to pure water in the past and it seemed to keep it a few degrees cooler. I only kept it through a summer and drained it, then refilled with 50/50 before selling it.
