how important is coolant?

[red888]

coolant is very important...

first, it has anti-rust properties. second, it lowers the boiling point of water.

by the way, how often do you change your coolant-water mixture? it shouldn't be that expensive since it should be done only every 30K km.

bok, i think u mean " it increases the boiling point of water " , don't u think so ?