--- title: "Better to be Blue: Improving Diesel Engines With BlueDEF®" description: Not all diesel exhaust fluid is the same. Learn how to improve your diesel engine performance with BlueDEF® from Keller-Heartt Oil. image: https://info.kellerheartt.com/hubfs/images/blog/Optimized/BlueDEF.jpeg --- [![keller-heartt-oil](https://info.kellerheartt.com/hubfs/branding/keller-heartt-logo.200.png)](https://www.kellerheartt.com/) - Shop By Industry - [Trucking & Automotive](https://www.kellerheartt.com/collections/commercial-truck-supplies) - [Diesel Exhaust Fluid](https://www.kellerheartt.com/collections/diesel-exhaust-fluid) - [Motor Oil](https://www.kellerheartt.com/collections/motor-oil) - [Brake Cleaner](https://www.kellerheartt.com/collections/brake-cleaner) - [Antifreeze](https://www.kellerheartt.com/collections/antifreeze-coolants) - [Transmission Fluid](https://www.kellerheartt.com/collections/transmission-fluid) - [Machine Shops & Metalworking](https://www.kellerheartt.com/collections/metalworking-fluids) - [Cutting Oil](https://www.kellerheartt.com/collections/cutting-oil) - [Coolant](https://www.kellerheartt.com/collections/tool-die-coolants) - [Hydraulic Oil](https://www.kellerheartt.com/collections/hydraulic-oil) - [Soluble Oil](https://www.kellerheartt.com/collections/soluble-oil) - [Rust Preventative](https://www.kellerheartt.com/collections/tool-die-rust-veto) - [Industrial](https://www.kellerheartt.com/collections/industrial-products) - [Hydraulic Oil](https://www.kellerheartt.com/collections/hydraulic-oil) - [Industrial Gear Oil](https://www.kellerheartt.com/collections/industrial-gear-oil-all-sizes-brands) - [Multi-Purpose Grease](https://www.kellerheartt.com/collections/multi-purpose-grease) - [Cleaner & Degreaser](https://www.kellerheartt.com/collections/industrial-cleaners-descalers-degreasers) - [Ethylene Glycol](https://www.kellerheartt.com/collections/ethylene-glycol) - [Food & Beverage](https://www.kellerheartt.com/collections/food-grade-oils-lubricants) - [Propylene Glycol](https://www.kellerheartt.com/collections/propylene-glycol-drums) - [Cassida Fluid & Grease](https://www.kellerheartt.com/collections/cassida-lubricants-greases) - [Fuchs Gear Oil & Grease](https://www.kellerheartt.com/collections/fuchs-lubricants) - Shop By Brand - [Shell Products](https://www.kellerheartt.com/collections/shell-oil-lubricants) - [TRUEGARD Products](https://www.kellerheartt.com/collections/truegard-oil-lubricants) - [Blue DEF Products](https://www.kellerheartt.com/collections/bluedef) - [Oil Eater Products](https://www.kellerheartt.com/collections/oil-eater) - [Blog](https://info.kellerheartt.com/blogs) - [Request a Quote](https://www.kellerheartt.com/pages/request-a-quote) [Contact Us](https://www.kellerheartt.com/pages/contact-us) BlueDEF # Better to be Blue: Improving Diesel Engines With BlueDEF® [Brian McGrath](https://info.kellerheartt.com/blogs/author/brian-mcgrath) Sep 13, 2024 --- If you’re managing a fleet of diesel vehicles made in the last dozen years, you’re likely already familiar with[diesel exhaust fluid](https://www.kellerheartt.com/collections/diesel-exhaust-fluid) (DEF). If you are not, you may be wondering “What is diesel exhaust fluid?” DEF is a precisely engineered solution containing 32.5% high-purity urea and 67.5% deionized water. It is used to help mitigate the impact of nitrous oxides (NOx) created from diesel fuel.  While the consumer automobile industry experiments with electric and hydrogen-powered engines, the need for diesel in commercial shipping remains strong. We aren’t abandoning diesel anytime soon, but we want to be smarter and more environmentally friendly when using it. The problem is that not all DEF is created equal. Effective DEF consistently follows the same chemical process for reducing NOx by Selective Catalytic Reduction (SCR): - DEF converts to ammonia and isocyanic acid - Isocyanic acid breaks down with water into carbon dioxide and ammonia - Ammonia, when combined with oxygen and a catalyst, reduces NOx output and converts it to harmless hydrogen and water This process should work every time your drivers run their engines. But if they add unauthorized DEF into their tanks, it could disrupt this conversion. ## **Risks of using unauthorized DEF** The American Petroleum Institute (API) and the International Organization for Standardization (ISO) issued strict compliance requirements for DEF production. Meeting ISO 22241 standards requires DEF producers to document the quality and purity of their product and explain any impurities (such as traces of metals or calcium) before purchase. Without these disclosures, buyers take a huge risk when filling their DEF tanks—even if they could save a few dollars in the process. - Unauthorized, noncompliant DEF may rely on public water systems or sub-standard urea, rather than high-quality treated solutions. Untreated water can carry additional contaminants and metals, which can inhibit the catalyst’s ability to break down NOx. - Unauthorized, noncompliant DEF may be stored in bulk tanks for months, especially when sold at highway truck stops. DEF can be maintained with [proper storage](https://info.kellerheartt.com/blogs/best-practices-for-storing-def) for 12 months or more, but temperature fluctuations can reduce its impact once transferred to a truck. - Unauthorized, noncompliant DEF may cause direct damage to your truck’s vital components, including the diesel particulate filter and the dosing pump. Poor quality, cloudy DEF is less likely to break down NOx—and more likely to [break down your truck’s engine](https://info.kellerheartt.com/blogs/troubleshooting-common-def-issues-in-trucks). ## **Mitigating risks with BlueDEF®** Your drivers are already busy doing their jobs. The last thing you want them to deal with is a broken-down truck from DEF failures. The fluid that goes into your DEF tanks should perform exactly as promised, making your life easier and the environment safer. Here’s how you can keep trucks running smoothly with BlueDEF® in their tanks: 1. BlueDEF® keeps impurities out of your SCR systems 2. BlueDEF® can be stored in various sizes to account for temperature changes 3. BlueDEF® can extend the life of your truck engines When you’re researching DEF solutions for your fleet, remember that not all DEF is the same. Poor quality DEF could damage your SCRs, break down your engines, and increase your maintenance costs. Make sure that your trucks are running high-quality DEF, both for the environment and your [budget sheet.](https://info.kellerheartt.com/blogs/calculating-your-def-needs-and-budget)And, if you want to learn more about how you can troubleshoot common DEF issues, we put together a [guide on troubleshooting common DEF issues](https://info.kellerheartt.com/download-common-diesel-exhaust-fluid-guide). We’re proud to offer BlueDEF® at Keller-Heartt Oil to help you optimize and improve your fleet operations. Check out our full selection of[diesel exhaust fluid products](https://www.kellerheartt.com/collections/diesel-exhaust-fluid), and[request a quote](https://www.kellerheartt.com/pages/request-a-quote) today.  [![Download Now ►](https://no-cache.hubspot.com/cta/default/23289434/interactive-175215758477.png)](https://info.kellerheartt.com/hs/cta/wi/redirect?encryptedPayload=AVxigLIIO47DZgWA5jJby8VePxpucjwKbwkJbjp5zcvzkTU8h6%2BfuUpLVZmr%2FIHqHz%2Femuv%2B%2F60xE02ceNgIaYSimtMNCO9Ujj0ltbQyWwZarOlyVbaOJluprpVugvlo%2FdK4oCYy5Cd8vPoA3on995lRMqgadh9cBoT3xKRQQpp6iwIWMIKCzD67WyxFnFdjak5Y9ExqnPniokRKfeRWNBkzMd9DVrM9vNW7tyqWdA%3D%3D&webInteractiveContentId=175215758477&portalId=23289434) [BlueDEF](https://info.kellerheartt.com/blogs/tag/bluedef) #### FOLLOW AND SHARE: [![share on facebook](https://info.kellerheartt.com/hs-fs/hubfs/images/social/icons/facebook-color.png?width=45&height=45&name=facebook-color.png)](https://www.facebook.com/pages/Keller-Heartt-Company/170082969671892?ref=hl) [![follow us on youtube](https://info.kellerheartt.com/hs-fs/hubfs/images/social/icons/youtube-color.png?width=45&height=45&name=youtube-color.png)](https://www.youtube.com/channel/UCA9e_Yo_qd4PqpK2dDdgxaw) [![follow us on instagram](https://info.kellerheartt.com/hs-fs/hubfs/images/social/icons/instagram-color.png?width=45&height=45&name=instagram-color.png)](https://www.instagram.com/keller.heartt/?hl=en) [![follow us on twitter](https://info.kellerheartt.com/hs-fs/hubfs/images/social/icons/twitter-color.png?width=45&height=45&name=twitter-color.png)](https://twitter.com/KellerHeartt) [![follow us on linkedin](https://info.kellerheartt.com/hs-fs/hubfs/images/social/icons/linkedin-color.png?width=45&height=45&name=linkedin-color.png)](https://www.linkedin.com/company/keller-heartt-oil/)   ## Similar posts BlueDEF ### [Is It Bad to Idle a Diesel for Long Periods? The Truth About Wear, Fuel, and Maintenance](https://info.kellerheartt.com/blogs/is-it-bad-idle-diesel) Is idling bad for a diesel engine? Learn the real effects of diesel idling, common myths, and how to prevent wear, fuel loss, and carbon buildup. Brian McGrath Mar 25, 2026 BlueDEF ### [FAQs About Diesel Exhaust Fluid Storage](https://info.kellerheartt.com/blogs/faqs-about-diesel-exhaust-fluid-storage) With the rising popularity of diesel exhaust fluid (DEF) comes ample questions about this vital automotive fluid. Read on for answers to our FAQs. Brian McGrath Mar 1, 2024 Diesel Exhaust Fluid ### [Troubleshooting Common DEF Issues in Trucks](https://info.kellerheartt.com/blogs/troubleshooting-common-def-issues-in-trucks) Troubleshoot common Diesel Exhaust Fluid (DEF) issues in trucks, learn best practices for maintenance, and ensure your fleet runs smoothly and... Brian McGrath Aug 9, 2024 ## **Get the latest oil & lubricant industry insights** Subscribe to the Keller-Heartt blog so you can sharpen your industry knowledge, gather helpful tips, and stay informed about changes or updates in the oil provider landscape. ### Subscribe to Our Blog! © 2025 Keller-Heart Oil All rights reserved ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Brian McGrath", "url" : "https://info.kellerheartt.com/blogs/author/brian-mcgrath" }, "dateModified" : "2024-09-13T12:00:01.502Z", "datePublished" : "2024-09-13T12:00:00.000Z", "headline" : "Better to be Blue: Improving Diesel Engines With BlueDEF®", "image" : [ "https://info.kellerheartt.com/hubfs/images/blog/Optimized/BlueDEF.jpeg" ], "mainEntityOfPage" : { "@id" : "https://info.kellerheartt.com/blogs/better-to-be-blue-improving-diesel-engines-bluedef", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://info.kellerheartt.com/hubfs/branding/keller-heartt-logo.350.png" }, "name" : "Keller-Heartt Co" } } ```