Question about 2001 Chrysler Town & Country
Hybrid OAT coolants, also known as HOAT antifreeze or G-05 antifreeze. This formulation also uses organic acids, but not 2-EHA (different organic acids are used). Hybrid OAT coolants add a small dose of silicates to provide quick-acting protection for aluminum surfaces. Hybrid OAT coolants are currently used by many European vehicle manufacturers as well as Ford and Chrysler.
As HOAT antifreeze ages, however, some of the silicates may drop out of solution. These particles can have an abrasive effect as they circulate in the cooling system, accelerating wear on water pump seals and plastic impellers, plastic radiator end tanks, or inside metal heater cores with sharply curved tubes. To avoid these kinds of problems, most HOAT-based antifreezes use stabilizers to keep the silicates in solution, and they contain only a small amount of silicates. HOAT-based antifreezes that claim to be "low silicate" formulas should meet the ASTM D6210 standard (which is a requirement for most late model diesel engines).
Like-OAT-based antifreezes, HOAT-based antifreezes also have a claimed service life of 5 years or 100,000 to 150,000 miles -- which ever comes first.
Posted on Apr 09, 2011
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Posted on Jan 02, 2017
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