minus 28 on radiator shroud

[uscrichter]

Can someone explain what the -28 means that is commonly written in grease pencil on the radiator shroud of  restored Camaros, if it is a number from a factory test wouldn't it very from the commonly seen -28 from car to car? and is this something judges look for in a concourse restoration? Since I am just finishing a four year restoration which I want the car to be as accurate as GM off the line without the over-restored graffiti.

[ko-lek-tor]

Antifreeze is good to -28 Fahrenheit. Not sure if it is essential in high end resto?

[KurtS]

The plant never wrote that on the shroud.  Dealers maybe did. "Restorers" do.

[uscrichter]

Thanks guy's , that explains it!  I have owned about a half dozen very low mileage cars and have never seen that either.