Graham R wrote:
Lou,
- 100F is -73 deg C if I calculate it correctly; what is the basis for that antifreeze?. I'd be surprised if it got that cold at the South pole!
Graham
Graham these antifreezes are rated by burst temp not freeze point temp because they are typically used to winterize water systems and stored engines.. in other words it does get solidified...but it does not expand and break things....so when they say -100 bust temp...it's really more like -60 freeze temp (stays liquid till about that cold...) the idea is that it gives a cushion if there is some water that did not drain...I took a gallon of the -60 stuff and put it in the freezer at zero F and it got a little hard but did not expand...so this would have been fine to fill a stored engine with but the -100 was completely liquid at that temp so I felt better with that...it sure costs more though...