{"id":224831,"date":"2022-04-01T19:48:20","date_gmt":"2022-04-01T19:48:20","guid":{"rendered":"https:\/\/testoil.com\/?p=224831"},"modified":"2023-05-02T18:42:57","modified_gmt":"2023-05-02T18:42:57","slug":"api-base-oil-classification-explained-by-eurofins-testoil","status":"publish","type":"post","link":"https:\/\/testoil.com\/did-you-know\/api-base-oil-classification-explained-by-eurofins-testoil\/","title":{"rendered":"API Base Oil Classification Explained by Eurofins TestOil"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"224831\" class=\"elementor elementor-224831\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6b88ccc5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6b88ccc5\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6a4ec4\" data-id=\"6a4ec4\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2a311a09 elementor-widget elementor-widget-text-editor\" data-id=\"2a311a09\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\n<p><strong>API Base Oil Classification Explained by Eurofins TestOil<\/strong><\/p>\n<p>Additives only account for about 10% of most finished lubricants, the rest is base oil\u2014which gives you some idea as to how important base oil actually is! The API (American Petroleum Institute) classifies base oils into five primary groups that are defined by three parameters: the saturate level, sulfur level, and viscosity index.<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Saturate Level: <\/strong>While saturates occur naturally in crude oil, they increase during the refining process. The higher the level, the greater the resistance to breakdown, oxidation, and loss of viscosity.<\/li>\n<li><strong>Sulfur Level: <\/strong>Sulfur also occurs naturally in crude oil. Generally, the lower the sulfur content, the purer the oil and the less susceptible it is to corrosion and oxidation.<\/li>\n<li><strong>Viscosity Index: <\/strong>The VI (viscosity index) refers to changes in viscosity relative to temperature. While all oils increase in viscosity when the temperature decreases and decrease in viscosity when the temperatures increases, when the viscosity index is high the oil is less reactive to temperature fluctuations.<a href=\"#_ftn1\" id=\"_ftnref1\"><sup>[1]<\/sup><\/a><\/li>\n<\/ul>\n\n<p><strong>The Five API Base Oil Groups<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Group I: These are less than 90 percent saturates, greater than 0.03 percent sulfur and have a\u00a0VI\u00a0of 80 to 120. Group I base oils are solvent-refined and aren\u2019t recommended for high performance applications.\u00a0 These are the least costly base oils available.<\/li>\n<li>Group II: These are greater than 90 percent saturates, less than 0.03 percent sulfur and have a VI of 80 to 120. They are often manufactured by hydrocracking. These oils have better antioxidation properties and a clearer color than Group I oils, but they aren\u2019t recommended for extreme pressure applications that require cold start viscosity and pour point performance.\u00a0Group II oils are common in off-the-shelf mineral-based motor oils.<\/li>\n<li>Group III: These are also greater than 90 percent saturates, less than 0.03 percent sulfur, but they have a VI over 120. These oils are more refined than Group II oils and are severely hydrocracked to achieve greater purity. Lubricants that result from these base oils are labeled synthetic or semi-synthetic.<\/li>\n<li>Group IV: These PAOs (polyalphaolefins) are developed through a synthesizing process. They have a much broader temperature range and are great for use in extreme cold conditions and high heat applications. They can be significantly more expensive than the 1st three groups.<\/li>\n<li>Group V: This group encompasses all other base oils, including silicone,\u00a0phosphate ester,\u00a0PAG (polyalkylene glycol), polyolester,\u00a0biolubes and more. These base oils are at times mixed with other base oils to enhance properties. For example, esters are common Group V base oils used in different lubricant formulations to improve the properties of the original base oil.<\/li>\n<\/ul>\n\n<p>There are also unofficial classifications of Group II+ (VI &gt;110); Group III+ (VI&gt;130); and Group VI ((synthetic oils\u00a0made of PIOs (poly-internal-olefins)).<a href=\"#_ftn2\" id=\"_ftnref2\">[2]<\/a><\/p>\n\n<p><strong>How Base Oil Affects Performance<\/strong><\/p>\n\n<p>Eurofins TestOil analysts know that a lubricant\u2019s base oil can have a significant impact on performance. <a href=\"https:\/\/testoil.com\/did-you-know\/how-base-oil-affects-lubricant-performance\/\">Lubricant properties<\/a> affected by base oil include:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Viscometrics\n<ul>\n<li>SAE viscosity grade<\/li>\n<li>Pour point and low temperature fluidity<\/li>\n<li>Fuel economy<\/li>\n<li>Wear Protection<\/li>\n<\/ul>\n<\/li>\n<li>Oxidation\n<ul>\n<li>Viscosity increase<\/li>\n<li>Acid formation (leading to corrosion)<\/li>\n<li>Deposit control<\/li>\n<\/ul>\n<\/li>\n<li>Dispersancy and solvency\n<ul>\n<li>Soot Control<\/li>\n<li>Viscosity increases and filter plugging<\/li>\n<li>Sludge<\/li>\n<li>Deposit control<\/li>\n<\/ul>\n<\/li>\n<li>Foaming\u00a0and air entrainment<\/li>\n<li>Volatility (evaporation)\n<ul>\n<li>Oil consumption and Flash Point<a href=\"#_ftn3\" id=\"_ftnref3\"><sup>[3]<\/sup><\/a><sup>, <a href=\"#_ftn4\" id=\"_ftnref4\"><sup>[4]<\/sup><\/a><\/sup><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<p>Regardless of the lubricant\u2019s properties, <a href=\"https:\/\/testoil.com\/services\/oil-analysis\/\">a comprehensive oil analysis program<\/a> is critical to optimizing lubricant performance. Working with a lab, like Eurofins TestOil, that knows the unique properties of base oils and their unique performance characteristics will ensure a more accurate picture of lubricant health.<\/p>\n\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 For more information on working with Eurofins TestOil for oil analysis and training visit <a href=\"https:\/\/testoil.com\">www.testoil.com<\/a>. Contact: 216-251-2510; <a href=\"mailto:sales@testoil.com\">sales@testoil.com<\/a>.<\/p>\n\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 With more than 30 years of experience in the oil analysis industry, Eurofins TestOil, focuses exclusively on assisting industrial facilities with reducing maintenance costs and avoiding unexpected downtime through oil analysis program implementation. As industry experts in diagnosing oil-related issues in equipment such as turbines, hydraulics, gearboxes, pumps, compressors and diesel generators, Eurofins TestOil provides customers with same-day turnaround on routine oil analysis testing. TestOil PRO certified lubrication professionals educate the industry on oil analysis through public and private onsite training. These highly experienced professionals provide a variety of onsite services; from collecting oil samples to conducting failure analyses to writing work orders. For more information on partnering with Eurofins TestOil on oil analysis programs or training opportunities visit <a href=\"https:\/\/linkprotect.cudasvc.com\/url?a=https%3a%2f%2ftestoil.com%2f&amp;c=E,1,CooOfkIdMSCa8PhI_k7G1TjxC-_GE_3dTnGgbAIyDiUpEKEQ9XrBd63ADtqUTgipZiw5KVr-qqozsRkjSAitFgc-MQUSqKNA_EXMaL1tbs23wfp4KpA,&amp;typo=1\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/testoil.com<\/a>. Contact: Michael Barrett 216-251-2510;\u00a0<a href=\"mailto:sales@testoil.com\" target=\"_blank\" rel=\"noreferrer noopener\">sales@testoil.com<\/a>.\u00a0<\/p>\n<hr class=\"wp-block-separator\" \/>\n<p><a href=\"#_ftnref1\" id=\"_ftn1\">[1]<\/a> From <a href=\"https:\/\/www.rymax-lubricants.com\/updates\/what-are-the-differences-in-base-oil-groups\/\">https:\/\/www.rymax-lubricants.com\/updates\/what-are-the-differences-in-base-oil-groups\/<\/a><\/p>\n\n<p><a href=\"#_ftnref2\" id=\"_ftn2\">[2]<\/a> From Wikipedia entry on Base Oil: <a href=\"https:\/\/en.wikipedia.org\/wiki\/Base_oil\">https:\/\/en.wikipedia.org\/wiki\/Base_oil<\/a><\/p>\n\n<p><a href=\"#_ftnref3\" id=\"_ftn3\">[3]<\/a> From Infineum \u201cLubricant Base Oils\u201d May be available at:\u00a0<a href=\"https:\/\/www.infineuminsight.com\/media\/1814\/3-lubricant-base-stocks-na.pdf\">https:\/\/www.infineuminsight.com\/media\/1814\/3-lubricant-base-oils-na.pdf<\/a><\/p>\n\n<p><a href=\"#_ftnref4\" id=\"_ftn4\">[4]<\/a> See also Eurofins TestOil blog post: <a href=\"https:\/\/testoil.com\/did-you-know\/how-base-oil-affects-lubricant-performance\/\">https:\/\/testoil.com\/did-you-know\/how-base-oil-affects-lubricant-performance\/<\/a><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"API Base Oil Classification Explained by Eurofins TestOil Additives only account for about 10% of most finished lubricants, the rest is base oil\u2014which gives you some idea as to how important base oil actually is! The API (American Petroleum Institute) classifies base oils into five primary groups that are defined by three parameters: the saturate level, sulfur level, and viscosity&nbsp;<a href=\"https:\/\/testoil.com\/did-you-know\/api-base-oil-classification-explained-by-eurofins-testoil\/\" class=\"read-more\">Continue Reading<\/a>","protected":false},"author":4012,"featured_media":224833,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[404],"tags":[3975],"class_list":["post-224831","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-did-you-know","tag-api-base-oil-classification","cat-404-id"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.0 (Yoast SEO v24.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>API Base Oil Classification Explained by Eurofins TestOil - TestOil<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/testoil.com\/did-you-know\/api-base-oil-classification-explained-by-eurofins-testoil\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"API Base Oil Classification Explained by Eurofins TestOil\" \/>\n<meta property=\"og:description\" content=\"API Base Oil Classification Explained by Eurofins TestOil Additives only account for about 10% of most finished lubricants, the rest is base oil\u2014which gives you some idea as to how important base oil actually is! 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The API (American Petroleum Institute) classifies base oils into five primary groups that are defined by three parameters: the saturate level, sulfur level, and viscosity&nbsp;Continue Reading","og_url":"https:\/\/testoil.com\/did-you-know\/api-base-oil-classification-explained-by-eurofins-testoil\/","og_site_name":"TestOil","article_publisher":"https:\/\/www.facebook.com\/TESTOILanalysis","article_published_time":"2022-04-01T19:48:20+00:00","article_modified_time":"2023-05-02T18:42:57+00:00","og_image":[{"width":1200,"height":630,"url":"https:\/\/testoil.com\/wp-content\/uploads\/2022\/04\/Base-Oil.jpg","type":"image\/jpeg"}],"author":"Mary Messuti","twitter_card":"summary_large_image","twitter_creator":"@TESTOILAnalysis","twitter_site":"@TESTOILAnalysis","twitter_misc":{"Written by":"Mary Messuti","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/testoil.com\/did-you-know\/api-base-oil-classification-explained-by-eurofins-testoil\/#article","isPartOf":{"@id":"https:\/\/testoil.com\/did-you-know\/api-base-oil-classification-explained-by-eurofins-testoil\/"},"author":{"name":"Mary Messuti","@id":"https:\/\/testoil.com\/#\/schema\/person\/634f56adbdecfee75bde9ce908569a0d"},"headline":"API Base Oil Classification Explained by Eurofins TestOil","datePublished":"2022-04-01T19:48:20+00:00","dateModified":"2023-05-02T18:42:57+00:00","mainEntityOfPage":{"@id":"https:\/\/testoil.com\/did-you-know\/api-base-oil-classification-explained-by-eurofins-testoil\/"},"wordCount":778,"publisher":{"@id":"https:\/\/testoil.com\/#organization"},"image":{"@id":"https:\/\/testoil.com\/did-you-know\/api-base-oil-classification-explained-by-eurofins-testoil\/#primaryimage"},"thumbnailUrl":"https:\/\/testoil.com\/wp-content\/uploads\/2022\/04\/Base-Oil.jpg","keywords":["API Base Oil Classification"],"articleSection":["Did You Know?"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/testoil.com\/did-you-know\/api-base-oil-classification-explained-by-eurofins-testoil\/","url":"https:\/\/testoil.com\/did-you-know\/api-base-oil-classification-explained-by-eurofins-testoil\/","name":"API Base Oil Classification Explained by Eurofins TestOil - 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