Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums General Petroliana Discussion Vintage &use of this Oilzum 22(?) gallon barrel

Hello. This (22? gallon) Oilzum barrel was under the counter in my father's garage for many years. Does anyone know the vintage and what might have been in it? The stenciling is faded and all I can read is "anti-foam". Any help would be appreciated.