mattchan6668

I saw some thread they always 70% water / 30% coolant mix it .I just want to know why don't just put 100% coolant in radiator?

tafkamb2

because the straight coolant will not cool your engine efficently. Water will tho and if your in a warm all year climate then you can use straight water. The coolant is there to keep the water from freezing in cold climates.

93FD3S

Make sure you use distilled water.

mdude

i use 100% coolant in my car, but i use evan's npg so it's okay.

bajaman

70% water is NOT recommended by Mazda. Read your decal. It specifically says:
"Coolant concentration must be maintained at 45% or higher. Example: 45% or higher coolant, 55% or lower water."

salamander

Coolant has anti corrosion and lubrication properties that water does not provide. Water does have a higher heat transfer capacity than coolant so those in warmer climes may want to use a higher water percentage.

I think Evan's is propylene glycol which is essentially non-toxic (ethylene glycol is very toxic) but propylene glycol has much higher viscosity in cold weather.

car hugger

iTrader: (1)

Straight from the FSM