No one ever replied to this but after using the Evans waterless coolant in my series I e-type I had Greg Brown install it in my 928 when he rebuilt the power train. So far it’s going well. The car runs a tad hotter (it has a lower coefficient of heat transfer) but the gauge barely moves under stressful driving, even with the ac on. Zero corrosion and it’s never going to boil over. I recommend it.
