The following engine coolant is also recommended:
John Deere COOL-GARD II Concentrate in a 40—60% mixture of concentrate with quality water.
IMPORTANT: When mixing coolant concentrate with water, do not use less than 40% or greater than 60% concentration of coolant. Less than 40% gives inadequate additives for corrosion protection. Greater than 60% can result in coolant gelation and cooling system problems.
Other Coolants
Other ethylene glycol or propylene glycol base coolants may be used if they meet the following specification:
Pre-mix coolant meeting ASTM D6210 requirements
Coolant concentrate meeting ASTM D6210 requirements in a 40—60% mixture of concentrate with quality water