1.1 This specification covers the requirements for a recycled prediluted aqueous ethylene glycol (50 volume % minimum) base engine coolant and recycled prediluted aqueous propylene glycol (50 volume % minimum) base engine coolant for use in This specification covers the requirements for a recycled prediluted aqueous ethylene and propylene glycol base engine coolant for automobile and light-duty service. This standard is not applicable to coolant produced from other glycol sources. This sp