Mez Posted December 12, 2006 Share Posted December 12, 2006 My 2000 Toyota Sienna requires type 2 antifreeze. From what I have gathered on the web, type two is OAT type antifreeze and Zerex G05 is HOAT type antifreeze. Can the G05 be used in its place? Thanks, John Quote Link to comment Share on other sites More sharing options...
stevelaw Posted December 14, 2006 Share Posted December 14, 2006 You're not under any warranty at this time, are you? I think the chemistry of the 2 technologies are similar, but if they are not and you try to use the Zerex, you'd probable be best to flush all of the old coolant out totally. Quote Link to comment Share on other sites More sharing options...
Mez Posted December 15, 2006 Author Share Posted December 15, 2006 The Sienna has 100k with original antifreeze. John Quote Link to comment Share on other sites More sharing options...
stevelaw Posted December 18, 2006 Share Posted December 18, 2006 Whoa--you mean it hasn't been changed yet? Have you looked at it lately? The Sienna has 100k with original antifreeze. John Quote Link to comment Share on other sites More sharing options...
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