I love Water Wetter, I use to have my nitrous 2.9 V6 and used the nitrous a lot more than I should have, "Hey it made trips to the grocery store much more fun" I would notice that after using it in city streets the engine temp would spike rather quickly, on the suggestion of the place that filled my nitrous bottles, I added the water wetter to a 75% water 20% antifreeze and one bottle water wetter mix. The temps were much more stable, car ran cooler and overall just performed better.
Now its part of my normal spring routine, every spring I drain out the cooling system, flush it and put in fresh distilled water 1 gallon of antifreeze and 1/2 liter of water wetter. I have not had a Fiero overheat in years.
85GT Soon to be 87GT,93 Eldorado 4.9, 5spd Dual O2 Custom Chip, Custom Exhaust. MSD Everything Capt Fiero --- My Over View Cadero Pics Yellow 88GT 5spd Full Poly Suspension, Lowered 1/2" in front, Corner Carver.