Either the alcohol-base or ethylene-glycol base anti-freeze is
recommended for use in your Studebaker. Be sure the brand you select
contains a rust inhibitor. Do not use an anti-freeze preparation which
contains salt, sugar, calcium chloride, soda, or petroleum base
compounds.
Reputable anti-freeze companies supply their dealers with charts showing
the amount of anti-freeze to use for protection to various anticipated
temperatures, depending upon cooling system capacity given on page 53.