BY BLAIR LAMPE / ORIGINALLY PUBLISHED JUNE 27, 2019 / NATIONAL AUTOMOTIVE PARTS ASSOCIATION / Engines are complex machines with rapidly moving metal parts and small&hellip;{"id":11429,"date":"2019-08-15T10:54:55","date_gmt":"2019-08-15T17:54:55","guid":{"rendered":"https:\/\/www.pomonaswapmeet.com\/blog\/?p=11429"},"modified":"2019-08-15T10:54:55","modified_gmt":"2019-08-15T17:54:55","slug":"what-is-hoat-coolant-4-things-you-need-to-know","status":"publish","type":"post","link":"https:\/\/www.pomonaswapmeet.com\/blog\/2019\/08\/15\/what-is-hoat-coolant-4-things-you-need-to-know\/","title":{"rendered":"What is HOAT Coolant? 4 Things You Need To Know"},"content":{"rendered":"<h5><span style=\"color: #000000;\">BY BLAIR LAMPE \/ ORIGINALLY PUBLISHED JUNE 27, 2019 \/<\/span> <a href=\"https:\/\/www.napaonline.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">NATIONAL AUTOMOTIVE PARTS ASSOCIATION<\/a>\u00a0<span style=\"color: #000000;\">\/<\/span><\/h5>\n<p><span style=\"color: #000000;\">Engines are complex machines with rapidly moving metal parts and small clearances. And as such, they generate a lot of heat. You already know that coolant is an integral part of\u00a0<\/span><strong><a href=\"http:\/\/knowhow.napaonline.com\/3-car-fluids-always-hand\/\" target=\"_blank\" rel=\"noopener noreferrer\">keeping your engine from exploding<\/a><\/strong><span style=\"color: #000000;\">, and you probably also know that you have\u00a0<\/span><strong><a href=\"http:\/\/knowhow.napaonline.com\/understanding-antifreeze-whats-best-car-truck\/\" target=\"_blank\" rel=\"noopener noreferrer\">multiple coolant options<\/a><\/strong>\u00a0<span style=\"color: #000000;\">that aren\u2019t interchangeable. But how do you know which is OK to use? Color is not a reliable indicator in choosing between OAT, IAT and HOAT, so you better choose wisely \u2026 and what is HOAT coolant anyway? Let\u2019s dig in.<\/span><\/p>\n<h5><span style=\"color: #000000;\"><strong>1. The Story on HOAT<\/strong><\/span><\/h5>\n<p><span style=\"color: #000000;\">Inorganic Acid Technology (IAT) Coolant was pretty much the original type of coolant and is still used in older vehicles. It lasts around 30,000 miles before it turns too acidic and needs to be changed. Organic Acid Technology (OAT) Coolant uses additives to increase its lifespan significantly \u2014 up to around 150,000 miles.<\/span>\u00a0<strong><a href=\"https:\/\/www.napaonline.com\/en\/p\/ZRX861398?cid=social_blog_062019_zerex_antifreeze\" target=\"_blank\" rel=\"noopener noreferrer\">Hybrid Organic Acid Technology (HOAT) Coolant<\/a><\/strong>\u00a0<span style=\"color: #000000;\">is a hybrid of the two.<\/span><\/p>\n<h5><span style=\"color: #000000;\"><strong>2. How HOAT Came to Life<\/strong><\/span><\/h5>\n<p><span style=\"color: #000000;\">You want your coolant to do a few things. Most importantly, it cools the engine, but remember it\u2019s also passing through metal passageways and subject to vastly different operating temperatures, so it needs to deal with all of that. The original IAT is strongly anti-corrosive, but it needs to be changed regularly. OAT lasts much longer, but it doesn\u2019t defend against corrosion as well. Ironically, simply mixing the two can have damaging corrosive effects, but the hybrid-engineered HOAT uses a chemical composition that keeps rust and buildup at bay, is effective at very low and high temperatures alike, and lasts five years and beyond.<\/span><\/p>\n<h5><span style=\"color: #000000;\"><strong>3. Careful, HOAT Doesn\u2019t Play Nice<\/strong><strong><br \/>\n<\/strong><\/span><\/h5>\n<p><span style=\"color: #000000;\">Nope! On the surface, it seems like a hybrid between IAT and OAT would be compatible with either, but that\u2019s not the case. They may share similar names, but the chemical recipe is different enough that manufacturers do not recommend mixing them. Doing so potentially limits your coolant\u2019s effectiveness in doing its job and can greatly reduce the lifespan. And as mentioned earlier, it might actually gunk up the system. This is true even if you\u2019ve drained the coolant from an engine \u2014 it\u2019s not so easy as to just add a different type because traces of the old type remain and cling to passageways.<\/span><\/p>\n<h5><span style=\"color: #000000;\"><strong>4. When to Use HOAT<\/strong><\/span><\/h5>\n<p><span style=\"color: #000000;\">As with most other questions about your car, check your owner\u2019s manual. It should specify the coolant type. You may think the benefits of IAT, OAT or HOAT are what your vehicle needs, but it\u2019s not a call you can easily make without cleaning out the entire cooling system (more than just a flush). So it\u2019s really best to just stick with what was designed to support your engine and you will be fine.<\/span><\/p>\n<p><span style=\"color: #000000;\">Always wait for an engine to cool down before opening a<\/span>\u00a0<strong><a href=\"https:\/\/www.napaonline.com\/en\/search?text=radiator\" target=\"_blank\" rel=\"noopener noreferrer\">radiator<\/a><\/strong>\u00a0<span style=\"color: #000000;\">or coolant reservoir cap, as the system is under pressure and the coolant is scalding hot. And remember, contrary to popular belief, color should not be the determining factor for adding or mixing coolant because it is not standardized or indicative of chemical makeup. Always check with the manufacturer to make sure you\u2019re adding what your engine needs.<\/span><\/p>\n<p><span style=\"color: #000000;\">Check out all the<\/span>\u00a0<strong><a href=\"https:\/\/www.napaonline.com\/en\/c\/chemicals\" target=\"_blank\" rel=\"noopener noreferrer\">chemical &amp; lubricant products<\/a><\/strong>\u00a0<span style=\"color: #000000;\">available on<\/span>\u00a0<strong><a href=\"https:\/\/www.napaonline.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">NAPA Online<\/a><\/strong> <span style=\"color: #000000;\">or trust one of their 17,000<\/span> <strong><a href=\"http:\/\/www.napaautocare.com\/store-finder.aspx\" target=\"_blank\" rel=\"noopener noreferrer\">NAPA AutoCare locations<\/a><\/strong>\u00a0<span style=\"color: #000000;\">for routine maintenance and repairs. For more information on what is HOAT coolant, chat with a knowledgeable expert at your<\/span>\u00a0<strong><a href=\"https:\/\/www.napaonline.com\/en\/store-locator\" target=\"_blank\" rel=\"noopener noreferrer\">local NAPA AUTO PARTS store<\/a><\/strong>.<\/p>\n<p><span style=\"color: #000000;\">Photo credit: Blair Lampe<\/span><\/p>\n<p><span style=\"color: #000000;\"><em>This article has been reproduced with the permission of the copyright holder, National Automotive Parts Association. Further reproduction is prohibited without permission. Click here for more\u00a0<\/em><\/span><strong><em><a href=\"http:\/\/knowhow.napaonline.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">automotive tips and stories<\/a><\/em><\/strong><em>\u00a0<span style=\"color: #000000;\">from NAPA, or here for more information on<\/span>\u00a0<strong><a href=\"http:\/\/www.pomonaswapmeet.com\/event-info\/car-show-hours-dates\/\" target=\"_blank\" rel=\"noreferrer noopener\">the next Pomona Swap Meet &amp; Classic Car Show<\/a><\/strong><span style=\"color: #000000;\">.<\/span><\/em><\/p>\n","protected":false},"excerpt":{"rendered":null,"protected":false},"author":98,"featured_media":11436,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"cos_headline_score":0,"cos_seo_score":0,"cos_headline_text":"","cos_headline_has_been_analyzed":false,"cos_last_analyzed_headline":[],"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[805],"tags":[4152,4010,7204,7206,7205,7208,7210,7215,7217,3491,3037,3026,7207,7209,2241,7213,7214,7216,7211],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.pomonaswapmeet.com\/blog\/wp-content\/uploads\/2019\/08\/what-is-hoat-hybrid-organic-acid-technology-coolant-which-best-oat-iat-to-use-for-mopar-and-mixing.png?fit=891%2C467&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p9nnZN-2Yl","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/posts\/11429"}],"collection":[{"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/users\/98"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/comments?post=11429"}],"version-history":[{"count":4,"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/posts\/11429\/revisions"}],"predecessor-version":[{"id":11434,"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/posts\/11429\/revisions\/11434"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/media\/11436"}],"wp:attachment":[{"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/media?parent=11429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/categories?post=11429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pomonaswapmeet.com\/blog\/wp-json\/wp\/v2\/tags?post=11429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}