May 29, 200717 yr comment_210826 Redtek is hydrocarbon based and not EPA approved for automotive use. I've tested it and it cools well but one of it's ingredients is isobutane. That's kind of scary to me. Link to comment https://www.classiczcars.com/forums/topic/24432-your-experiences-with-134-ac-system-in-240z/?&page=2#findComment-210826 Share on other sites More sharing options...
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