You can avoid most system failures by simply using the right coolant.

18 Sept 2026 · 1 min

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Over 40% of engine failures come from poor cooling-system maintenance. John Deere CoolGuard II is a nitrite-free coolant that protects for six years or 6,000 hours. In extreme-heat tests, it outperformed competing coolants with minimal metal loss on aluminum.

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Did you know over 40% of engine failures are the result of insufficient cooling system maintenance? Help prevent those failures from occurring by using John Deere CoolGuard II. CoolGuard II is a fully formulated nitrite-free coolant to provide your engine with superior rust, corrosion, and cavitation protection for up to 6 years, 6,000 hours. CoolGuard II CoolGuard II was tested in the JDQ 1522 extreme heat oxidation test. As you can see, it protected a variety of metals better than the competition. In aluminum, CoolGuard II experienced almost no metal loss due to corrosion. Don't risk it with anything less than John Deere CoolGuard II.