Might be the only one you know of... but it's not the only one.
Whether ethylene glycol expands or contracts when it freezes is immaterial,
since nobody uses it pure as an engine coolant -- and the 50-50 aqueous
solution of E.G. that *is* typically used as coolant certainly *does* expand
when it freezes.
Doug Miller (alphageek at milmac dot com)
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.