{"id":116439,"date":"2025-12-08T15:35:08","date_gmt":"2025-12-08T15:35:08","guid":{"rendered":"https:\/\/www.crownoil.co.uk\/?page_id=116439"},"modified":"2026-01-12T12:54:12","modified_gmt":"2026-01-12T12:54:12","slug":"adblue-faqs","status":"publish","type":"page","link":"https:\/\/www.crownoil.co.uk\/faq\/adblue-faqs\/","title":{"rendered":"AdBlue\u00ae FAQs"},"content":{"rendered":"\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<h2 class=\"wp-block-heading first\" id=\"h-what-is-adblue-which-vehicles-need-it-and-more-questions-answered\">What is AdBlue\u00ae, Which Vehicles Need It and More Questions Answered<\/h2>\n\n\n\n<p>AdBlue<sup>\u00ae<\/sup> is essential for many modern diesel engines, helping businesses stay compliant with emissions legislation and keeping their fleets running efficiently. Below you\u2019ll find the answers to the most common questions that our customers ask us about AdBlue<sup>\u00ae<\/sup>, its use, storage and delivery options.<\/p>\n\n\n\n<p>As a leading UK <a href=\"https:\/\/www.crownoil.co.uk\/products\/adblue\/\">AdBlue<sup>\u00ae<\/sup><\/a> supplier, we\u2019ve put together our most commonly asked questions to help explain the many benefits of purchasing it from Crown Oil. If your questions are still unanswered at the end of this FAQ, simply give us a call on <a href=\"tel:03301231444\" class=\"rulertel\">0330 123 1444<\/a> and one of our fuel specialists will be able to help.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"298\" src=\"https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2024\/04\/Tankers-wide-1024x298.jpg\" alt=\"\" class=\"wp-image-112222\" srcset=\"https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2024\/04\/Tankers-wide-1024x298.jpg 1024w, https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2024\/04\/Tankers-wide-300x87.jpg 300w, https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2024\/04\/Tankers-wide-768x224.jpg 768w, https:\/\/www.crownoil.co.uk\/wp-content\/uploads\/2024\/04\/Tankers-wide.jpg 1417w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<div class=\"wp-block-crownoil-faq-panel faq-panel\"><search class=\"faq-panel__search\"><form class=\"crown-form\"><label class=\"faq-panel__header\" for=\"faq-panel-input\">Search&#8230;<\/label><div class=\"form__field\" style=\"display:flex\"><div class=\"form__input-wrapper\" style=\"inline-size:100%;max-inline-size:450px\"><input type=\"search\" id=\"faq-panel-input\" name=\"faq-panel-input\" class=\"faq-panel__input form__input\" placeholder=\"Enter a search term here\"\/><\/div><button type=\"submit\" class=\"faq-panel__button button\">Search<\/button><\/div><\/form><\/search><div class=\"faq-panel__faqs\">\n<div class=\"wp-block-crownoil-tabs tabs tabs--horizontal\">\n<nav class=\"wp-block-crownoil-tabs-item-container tabs__navigation\">\n<button class=\"wp-block-crownoil-tabs-item tabs__item tabs__item--active first_tab\">AdBlue<sup>\u00ae<\/sup> Explained<\/button>\n\n\n\n<button class=\"wp-block-crownoil-tabs-item tabs__item\">AdBlue Usage<sup>\u00ae<\/sup><\/button>\n\n\n\n<button class=\"wp-block-crownoil-tabs-item tabs__item\">Purchasing &amp; Consumption<\/button>\n\n\n\n<button class=\"wp-block-crownoil-tabs-item tabs__item\">AdBlue<strong><strong><strong><sup>\u00ae<\/sup><\/strong><\/strong><\/strong> Delivery<\/button>\n\n\n\n<button class=\"wp-block-crownoil-tabs-item tabs__item\">Storage Handling<\/button>\n<\/nav>\n\n\n\n<div class=\"wp-block-crownoil-tabs-panel-container tabs__panels\">\n<article class=\"wp-block-crownoil-tabs-panel tabs__panel tabs__panel--active\">\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<button class=\"wp-block-crownoil-accordion-toggle-all accordion__toggle-all\">Toggle All +<\/button>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\">What is AdBlue<sup>\u00ae<\/sup>?<\/summary><div class=\"accordion__body\">\n<p>AdBlue<sup>\u00ae<\/sup> is the registered trademark name for an Aqueous Urea Solution (AUS 32) or Diesel Exhaust Fluid (DEF). It\u2019s a non-toxic, odourless and colourless liquid consisting of 32.5% high-purity urea and 67.5% deionised water. It is not a fuel additive, but a separate fluid used in the exhaust stage of diesel engine systems.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>Why do modern diesel engines require AdBlue<sup>\u00ae<\/sup>?<\/strong><\/summary><div class=\"accordion__body\">\n<p>AdBlue<sup>\u00ae<\/sup> is required for modern diesel vehicles (typically those manufactured since around 2006, especially commercial vehicles over 7.5 tonnes) that use Selective Catalytic Reduction (SCR) technology. It is essential for meeting strict Euro 4, 5 and 6 emission standards by reducing harmful emissions.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>Is AdBlue<\/strong><sup>\u00ae<\/sup><strong> harmful?<\/strong><\/summary><div class=\"accordion__body\">\n<p>AdBlue<sup>\u00ae<\/sup> is non-toxic and safe to handle with basic precautions. Avoid contact with skin or eyes, as it may cause mild irritation. You must ensure you clean any spills immediately to prevent crystallisation or corrosion on surfaces.<\/p>\n<\/div><\/details>\n<\/div>\n<\/article>\n\n\n\n<article class=\"wp-block-crownoil-tabs-panel tabs__panel\">\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<button class=\"wp-block-crownoil-accordion-toggle-all accordion__toggle-all\">Toggle All +<\/button>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>Which vehicles use AdBlue<\/strong><sup>\u00ae<\/sup>?<\/summary><div class=\"accordion__body\">\n<p>Most modern diesel vehicles with Euro 5 and Euro 6 engines use AdBlue<sup>\u00ae<\/sup>, including:<\/p>\n\n\n\n<ul class=\"wp-block-list tick-list\">\n<li>Many modern diesel cars<\/li>\n\n\n\n<li>HGVs and LGVs<\/li>\n\n\n\n<li>Buses and coaches<\/li>\n\n\n\n<li>Vans and commercial vehicles<\/li>\n\n\n\n<li>Agricultural machinery<\/li>\n\n\n\n<li>Construction equipment<\/li>\n<\/ul>\n\n\n\n<p>If your vehicle has an SCR system, it will require AdBlue<sup>\u00ae<\/sup>.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>How does AdBlue<sup>\u00ae<\/sup> work?<\/strong><\/summary><div class=\"accordion__body\">\n<p>AdBlue\u00ae is sprayed into the exhaust fumes soon after combustion. In the SCR catalytic converter, the urea converts to ammonia, which then reacts with harmful mono-nitrogen oxides (NO<sub>x<\/sub>) in the exhaust. This chemical process breaks them down into harmless nitrogen gas (N<sub>2<\/sub>) and water vapour (H<sub>2<\/sub>O), which are then safely expelled from the exhaust pipe.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>What happens if I run out of AdBlue<sup>\u00ae<\/sup>?<\/strong><\/summary><div class=\"accordion__body\">\n<p>Your vehicle will give you several dashboard warnings before the tank is empty. If you ignore them:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Power will usually be reduced<\/li>\n\n\n\n<li>The vehicle may refuse to restart once turned off<\/li>\n<\/ul>\n\n\n\n<p>To avoid downtime, keep your tank topped up or arrange regular AdBlue<strong><sup>\u00ae<\/sup><\/strong> deliveries through Crown Oil.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>Does AdBlue<sup>\u00ae<\/sup> improve fuel efficiency?<\/strong><\/summary><div class=\"accordion__body\">\n<p>While AdBlue<sup>\u00ae<\/sup> itself doesn\u2019t improve fuel economy, SCR technology allows engines to be designed for improved performance whilst maintaining emission standards.<\/p>\n<\/div><\/details>\n<\/div>\n<\/article>\n\n\n\n<article class=\"wp-block-crownoil-tabs-panel tabs__panel\">\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<button class=\"wp-block-crownoil-accordion-toggle-all accordion__toggle-all\">Toggle All +<\/button>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>How much AdBlue<strong><sup>\u00ae<\/sup><\/strong> will my vehicle use?<\/strong><\/summary><div class=\"accordion__body\">\n<p>Consumption varies greatly based on the vehicle type, size, engine and driving style.<\/p>\n\n\n\n<p><strong>Passenger cars:<\/strong> A general rule of thumb is approximately 1 litre of AdBlue<strong><strong><sup>\u00ae<\/sup><\/strong><\/strong> every 600 miles (though it can vary from 350 to over 1,000 miles).<\/p>\n\n\n\n<p><strong>Commercial vehicles\/HGVs:<\/strong> Consumption is typically around 5% of the rate of diesel fuel usage.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>What quantities of AdBlue<strong><strong><sup>\u00ae<\/sup><\/strong><\/strong> does Crown Oil supply?<\/strong><\/summary><div class=\"accordion__body\">\n<p>Crown Oil supplies AdBlue<sup>\u00ae<\/sup> in a range of volumes to suit all commercial applications:<\/p>\n\n\n\n<ul class=\"wp-block-list tick-list\">\n<li>Small packs (e.g. 5-litre, 10-litre, 210-litre barrels)<\/li>\n\n\n\n<li>1,000-litre Intermediate Bulk Containers (IBCs)<\/li>\n\n\n\n<li>Bulk deliveries via tankers up to 25,000 litres for maximum cost-effectiveness<\/li>\n<\/ul>\n\n\n\n<p>We also supply tanks, dispensing equipment, spill kits and other accessories to help you use your AdBlue<sup>\u00ae<\/sup> safely.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong><strong>Does Crown Oil&#8217;s AdBlue<strong><strong><strong><sup>\u00ae<\/sup><\/strong><\/strong><\/strong> meet the required quality standards?<\/strong><\/strong><\/summary><div class=\"accordion__body\">\n<p>Yes. All AdBlue<sup>\u00ae<\/sup> supplied by Crown Oil meets the stringent international quality standard ISO 22241 and has VDA quality approval, ensuring it protects your SCR system.<\/p>\n<\/div><\/details>\n<\/div>\n<\/article>\n\n\n\n<article class=\"wp-block-crownoil-tabs-panel tabs__panel\">\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<button class=\"wp-block-crownoil-accordion-toggle-all accordion__toggle-all\">Toggle All +<\/button>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>Can I mix AdBlue<strong><strong><sup>\u00ae<\/sup><\/strong><\/strong> from different suppliers?<\/strong><\/summary><div class=\"accordion__body\">\n<p>As long as the product meets ISO 22241 and is branded correctly, it can be mixed. However, contaminated or low-quality AdBlue<strong><strong><strong><sup>\u00ae<\/sup><\/strong><\/strong><\/strong> can damage your SCR system. Crown Oil only supplies certified, high-purity AdBlue<strong><strong><strong><sup>\u00ae<\/sup><\/strong><\/strong><\/strong>.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>How quickly can Crown Oil deliver AdBlue<strong><strong><sup>\u00ae<\/sup><\/strong><\/strong>?<\/strong><\/summary><div class=\"accordion__body\">\n<p>We offer fast, nationwide delivery, depending on your location and order size. Bulk deliveries can be scheduled as needed, and emergency options are available.<\/p>\n<\/div><\/details>\n<\/div>\n<\/article>\n\n\n\n<article class=\"wp-block-crownoil-tabs-panel tabs__panel\">\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<button class=\"wp-block-crownoil-accordion-toggle-all accordion__toggle-all\">Toggle All +<\/button>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>How should AdBlue<strong><strong><strong><sup>\u00ae<\/sup><\/strong><\/strong><\/strong> be stored?<\/strong><\/summary><div class=\"accordion__body\">\n<p>AdBlue<sup>\u00ae<\/sup> must be stored correctly to maintain its quality:<\/p>\n\n\n\n<ul class=\"wp-block-list tick-list\">\n<li><strong>Shelf life:<\/strong> When stored under ideal conditions, AdBlue\u00ae has a shelf life of around 12 months before it begins to degrade<\/li>\n\n\n\n<li><strong>Temperature:<\/strong> Store in a cool, well-ventilated area, ideally between -11\u00b0C and 30\u00b0C<\/li>\n\n\n\n<li><strong>Containers:<\/strong> It should be kept out of direct sunlight in a specialised, sealed AdBlue<sup>\u00ae<\/sup> container or tank<\/li>\n<\/ul>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>Can AdBlue<\/strong><sup>\u00ae<\/sup><strong> freeze?<\/strong><\/summary><div class=\"accordion__body\">\n<p>Yes. AdBlue<sup>\u00ae<\/sup> freezes at -11\u00b0C, but this won\u2019t damage its quality. Vehicles with SCR systems have built-in heaters to defrost AdBlue<sup>\u00ae<\/sup> automatically.<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-crownoil-accordion accordion\" style=\"--accordion-clr-1:#314b64;--accordion-clr-2:#314b64\"><summary class=\"accordion__header\"><strong>Do you offer AdBlue<\/strong><sup>\u00ae<\/sup><strong> storage and dispensing solutions?<\/strong><\/summary><div class=\"accordion__body\">\n<p>Yes &#8211; Crown Oil can supply:<\/p>\n\n\n\n<ul class=\"wp-block-list tick-list\">\n<li>AdBlue<sup>\u00ae<\/sup> bunded tanks<\/li>\n\n\n\n<li>Hand pumps and electric pumps<\/li>\n\n\n\n<li>Gravity-fed kits<\/li>\n\n\n\n<li>IBC cages and dispensing equipment<\/li>\n<\/ul>\n\n\n\n<p>Our team can help you select the right setup for your usage levels \u2013 call us today on <a href=\"tel:03301231444\" class=\"rulertel\">0330 123 1444<\/a> to find out more.<\/p>\n<\/div><\/details>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<div class=\"wp-block-crownoil-cards cards\">\n<a class=\"wp-block-crownoil-card cards__item\" href=\"https:\/\/www.crownoil.co.uk\/faq\/\"><h3 class=\"cards__title\">View More FAQs<\/h3><div class=\"cards__description\"><p>Check out our other FAQs, answered by our team of experts.<\/p><\/div><span class=\"accent-link\">Read more<\/span><\/a>\n\n\n\n<a class=\"wp-block-crownoil-card cards__item\" href=\"https:\/\/www.crownoil.co.uk\/products\/adblue\/\"><h3 class=\"cards__title\">AdBlue<sup>\u00ae<\/sup><\/h3><div class=\"cards__description\"><p>Learn more about AdBlue<sup>\u00ae<\/sup>, its benefits, specifications, and how to request a quote.<\/p><\/div><span class=\"accent-link\">Read more<\/span><\/a>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-crownoil-content-spacer content-spacer\">\n<div class=\"wp-block-crownoil-well well\" style=\"--bg-clr:var(--pale-grey)\">\n<p><strong>If you have any questions about our AdBlue<sup>\u00ae<\/sup>, call our experts today on <a href=\"tel:03301231444\" class=\"rulertel\">0330 123 1444<\/a>. We\u2019ll be happy to discuss your requirements and answer any additional questions about AdBlue<sup>\u00ae<\/sup>, along with our other fuels and services.<\/strong><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"parent":97019,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-116439","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>AdBlue\u00ae FAQs - What is it &amp; Why diesel vehicles need it? | Crown Oil<\/title>\n<meta name=\"description\" content=\"Answering your AdBlue\u00ae FAQ questions: What is it? How does it work? Which vehicles &amp; diesel engines need it? Learn more about our AdBlue\u00ae &amp; more\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.crownoil.co.uk\/faq\/adblue-faqs\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"AdBlue\u00ae FAQs\" \/>\n<meta property=\"og:description\" content=\"Answering your AdBlue\u00ae FAQ questions: What is it? How does it work? Which vehicles &amp; diesel engines need it? 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