John Deere Original Equipment COOL-GARD II CONCENTRATE - TY26573. COOL-GARD II CONCENTRATE, 1 GAL;3.78L. Engine Coolant. Heavy-duty, low-silicate, high performance antifreeze/coolant. When mixed in the proper ratio with quality water, is a low-silicate, high-performance antifreeze/coolant designed to meet today's heavy -duty engine requirements. Recommended for use in all John Deere engines. This is a OEM John Deere Part. Thanks for looking!