Heat issues going with FI

Originally Posted by Sh0velMan

I run WW and water in my Z.

Just the WW added to the OEM fill helped a little, 3-4 degrees in normal use. The effect is a lot more dramatic with straight water.

Reducing your coolant mix to ~15% antifreeze (and thus raising your freeze temp to around 10-15 degrees F, so if you live in Fargo or something, probably not something you want to do) and adding WW will make a dramatic difference.