{"id":86977,"date":"2023-07-06T02:42:37","date_gmt":"2023-07-06T09:42:37","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=86977"},"modified":"2025-11-07T18:32:49","modified_gmt":"2025-11-08T02:32:49","slug":"why-is-my-car-burning-so-much-gas","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/why-is-my-car-burning-so-much-gas\/","title":{"rendered":"Why Is My Car Burning So Much Gas?"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<div class=\"summary-widget\">\n    <h3>Summary<\/h3>\n    <ul class=\"summary-grid\">\n            <li class=\"summary-grid-list\">\n            <div class=\"sm-item\">\n\n                                    <p class=\"sm-title\">\n                        Higher fuel consumption often stems from driving habits, weather, or engine control issues that disrupt combustion efficiency. Dirty oxygen or mass airflow sensors, along with faulty spark plugs or ignition parts, commonly contribute to the problem.                    <\/p>\n                \n            <\/div>\n        <\/li>\n            <li class=\"summary-grid-list\">\n            <div class=\"sm-item\">\n\n                                    <p class=\"sm-title\">\n                        Other causes include low tire pressure, a clogged air filter, overdue oil changes, dirty fuel injectors, worn piston rings, excessive A\/C use, cold weather, and a thermostat stuck open. Fixing these issues helps restore normal engine performance and fuel economy.                    <\/p>\n                \n            <\/div>\n        <\/li>\n            <li class=\"summary-grid-list\">\n            <div class=\"sm-item\">\n\n                                    <p class=\"sm-title\">\n                        Good gas mileage means traveling farther on less fuel, averaging around 23 MPG depending on the vehicle&rsquo;s make, model, and year. Hybrid vehicles cost more initially but can lower fuel consumption and save money over time.                    <\/p>\n                \n            <\/div>\n        <\/li>\n        <\/ul>\n<\/div>\n\n\n\n\n\n<p><strong>There can be many reasons why your vehicle burns more fuel than usual. The issue can be as simple as your driving habits or changes in weather. Spark plug issues and dirty sensors may also negatively affect your vehicle&rsquo;s fuel economy.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">11 Common Causes of Poor Fuel Economy<\/h2>\n\n\n\n<p>Are you taking more trips to the pump than usual? Here are possible reasons why your vehicle consumes more gas than average.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Dirty Oxygen Sensors<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Oxygen sensors\">Oxygen sensors<\/a> measure the amount of oxygen in the exhaust. These sensors help your ride&rsquo;s computer correct the air-to-fuel ratio in your engine.<\/p>\n\n\n\n<p>If your <a href=\"https:\/\/www.carparts.com\/blog\/bad-o2-sensor-symptoms-causes-replacement-cost\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen sensors are dirty\">oxygen sensors are dirty<\/a>, they can give incorrect measurements. This can trigger your fuel injectors to deliver more fuel to the engine than what&rsquo;s needed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Spark Plug Issues<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/bad-spark-plug-symptoms\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Issues\">Issues<\/a> with your <a href=\"https:\/\/www.carparts.com\/spark-plug\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"spark plugs\">spark plugs<\/a> can cause engine misfires. If your vehicle doesn&rsquo;t get the right amount of spark it needs for the combustion process, your engine won&rsquo;t start. Thus, fuel and engine power are wasted.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/spark-plug-cause-of-engine-misfires-1024x682.jpg\" alt=\"spark plug cause of engine misfires\" class=\"wp-image-86979\" style=\"width:1024px;height:682px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/spark-plug-cause-of-engine-misfires-1024x682.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/spark-plug-cause-of-engine-misfires-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/spark-plug-cause-of-engine-misfires-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/spark-plug-cause-of-engine-misfires-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/spark-plug-cause-of-engine-misfires-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/spark-plug-cause-of-engine-misfires-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/spark-plug-cause-of-engine-misfires-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/spark-plug-cause-of-engine-misfires.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Issues with your spark plugs can cause engine misfires.<\/figcaption><\/figure>\n\n\n\n<p>The same problem can happen to other parts of your ignition system like your <a href=\"https:\/\/www.carparts.com\/ignition-coil\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"coils\">coils<\/a> and wires.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Dirty Mass Airflow Sensor<\/h3>\n\n\n\n<p>Your <a href=\"https:\/\/www.carparts.com\/mass-air-flow-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"mass airflow sensor\">mass airflow sensor<\/a> measures the amount of air that flows through your engine. Similar to oxygen sensors, the information it collects helps in calculating the proper air-to-fuel ratio in the engine.<\/p>\n\n\n\n<p>A <a href=\"https:\/\/www.carparts.com\/blog\/symptoms-of-failing-mass-air-flow-sensor\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"dirty mass airflow sensor\">dirty mass airflow sensor<\/a> might not be able to measure airflow accurately. This can affect the amount of fuel that&rsquo;s injected into the engine. Aside from poor fuel economy, you might also notice frequent stalling.<\/p>\n\n\n\n<p>Some prefer to clean this sensor with a cleaning spray. Note, however, that cleaning a MAF sensor is not a good idea. The windings on the electrical portion of the sensor where the air passes through can be so small, so the cleaner won&rsquo;t be able to clean it. It might work for a little while, but you&rsquo;ll still have issues with it in the future.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Note, however, that cleaning a MAF sensor is not a good idea. The windings on the electrical portion of the sensor where the air passes through can be so small, so the cleaner won&rsquo;t be able to clean it.<\/p>\n<cite><em>&ndash;<\/em><a href=\"https:\/\/www.carparts.com\/blog\/author\/anthonyharlin\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Anthony Harlin, ASE Certified Master Automobile Technician\">Anthony Harlin, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Low Tire Pressure<\/h3>\n\n\n\n<p>Underinflated tires can cause increased rolling resistance.<\/p>\n\n\n\n<p>Modern vehicles are equipped with a <a href=\"https:\/\/www.carparts.com\/blog\/what-is-a-tpms-sensor-signs-and-causes-of-failure-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Tire Pressure Monitoring System (TPMS)\">Tire Pressure Monitoring System (TPMS)<\/a>. However, most TPMS will notify you only when there&rsquo;s a significant or rapid change in the pressure of your tires&mdash;when your tires are 25 percent below the manufacturer&rsquo;s recommended PSI.<\/p>\n\n\n\n<p>You can check your tire pressure manually by following our <a href=\"https:\/\/www.carparts.com\/blog\/how-to-check-tire-tread-and-tire-pressure\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Tire Inspection Guide\">Tire Inspection Guide<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Clogged Engine Air Filter<\/h3>\n\n\n\n<p>A dirty <a href=\"https:\/\/www.carparts.com\/air-filter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"air filter\">air filter<\/a> can <a href=\"https:\/\/www.carparts.com\/blog\/heres-what-happens-when-your-cars-engine-air-filter-is-dirty\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"restrict airflow\">restrict airflow<\/a>, so there&rsquo;ll be less oxygen in the fuel mixture. Once this happens, your engine will consume more fuel than required. This is common for older vehicles that can&rsquo;t detect poor air quality.<\/p>\n\n\n\n<p>To prevent this from happening, make sure to check your owner&rsquo;s manual for the recommended air filter replacement or cleaning interval.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Skipped Oil Change Schedule<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/how-to-change-your-oil\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Routine oil change\">Routine oil change<\/a> improves engine performance and helps maintain good gas mileage. That&rsquo;s because clean oil promotes proper lubrication of your engine components. It keeps your engine running smoothly.<\/p>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<p>Old and unchanged oil can thicken in time. Thick oil won&rsquo;t flow smoothly through your engine. Your engine will have to work harder, resulting in added fuel consumption.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fuel Injector Issues<\/h3>\n\n\n\n<p>Your <a href=\"https:\/\/www.carparts.com\/fuel-injector\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel injectors\">fuel injectors<\/a> supply fuel to the engine. The spray pattern of these injectors must be precise. Once these injectors get clogged or dirty, they might not be able to spray fuel efficiently when needed.<\/p>\n\n\n\n<p>If your vehicle suffers from <a href=\"https:\/\/www.carparts.com\/blog\/the-top-6-signs-of-bad-fuel-injectors\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel injector issues\">fuel injector issues<\/a>, you might have to clean the injectors or replace them.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Worn Piston Rings<\/h3>\n\n\n\n<p>Your <a href=\"https:\/\/www.carparts.com\/piston-ring-set\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"piston rings\">piston rings<\/a> serve as a seal between your vehicle&rsquo;s piston and cylinder wall. Once the seal is broken, your engine will lose pressure and suffer from poor fuel efficiency. This issue is more common in direct-injected vehicles.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Driving Habits<\/h3>\n\n\n\n<p>You can also consume more fuel if you&rsquo;re often speeding up or accelerating. In fact, according to fueleconomy.gov, a vehicle&rsquo;s fuel efficiency decreases at 50 mph. To conserve fuel, make sure to stick to the speed limit.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Too Much Use of A\/C<\/h3>\n\n\n\n<p>You consume fuel when you turn on your vehicle&rsquo;s air conditioning. According to existing data, blasting your A\/C often can reduce your car&rsquo;s fuel efficiency by 20 to 50 percent.<\/p>\n\n\n\n<p>If you want to conserve fuel, you can look for other ways to cool down your ride&rsquo;s cabin. For instance, you can park your vehicle in a shaded area. Depending on where you&rsquo;re driving, you might also want to drive with the windows down.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cold Temperature<\/h3>\n\n\n\n<p>Low temperatures can increase engine and transmission friction. It&rsquo;ll also take your vehicle more time to warm up during winter. Your fuel consumption can increase during cold months. Your car&rsquo;s heated seats and defrosters can also consume fuel.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Thermostat That&rsquo;s Stuck Open<\/h3>\n\n\n\n<p>Your fuel economy will also decrease because of an issue with your <a href=\"https:\/\/www.carparts.com\/thermostat\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"thermostat\">thermostat<\/a>. That&rsquo;s because your engine won&rsquo;t warm up as it should once your thermostat is stuck open. Make sure to watch out for <a href=\"https:\/\/www.carparts.com\/blog\/what-are-the-common-signs-of-a-bad-thermostat\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"symptoms of a failing thermostat\">symptoms of a failing thermostat<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Is Good Gas Mileage?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/car-refuel-after-traveling-1024x682.jpg\" alt=\"car refuel after traveling\" class=\"wp-image-86978\" style=\"width:1024px;height:682px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/car-refuel-after-traveling-1024x682.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/car-refuel-after-traveling-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/car-refuel-after-traveling-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/car-refuel-after-traveling-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/car-refuel-after-traveling-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/car-refuel-after-traveling-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/car-refuel-after-traveling-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/car-refuel-after-traveling.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Good gas mileage means that your vehicle is consuming less gas at a larger distance.<\/figcaption><\/figure>\n\n\n\n<p>Good gas mileage means that your vehicle is consuming less gas at a larger distance. Gas mileage is usually measured in (miles per gallon). Experts say 23 MPG is considered good gas mileage. However, it&rsquo;ll depend on many factors like your ride&rsquo;s exact year, make, and model. You can read our article about <a href=\"https:\/\/www.carparts.com\/blog\/what-is-good-gas-mileage\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"gas mileage\">gas mileage<\/a> to learn more about it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hybrid Options<\/h2>\n\n\n\n<p>If you&rsquo;d like to save more money on gas, you can invest in <a href=\"https:\/\/www.carparts.com\/ev\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"hybrid vehicles\">hybrid vehicles<\/a>. These vehicles still have a combustion engine, but they also have an electric motor that operates when traveling at low speeds. However, it&rsquo;s important to note that these vehicles are priced higher on the market, so you&rsquo;ll have to shell out a large sum of money to buy them. Although they&rsquo;re expensive, the benefits in fuel costs afterward will surely be worth it.<\/p>\n\n\n\n<p>Whether you own a hybrid car or a purely fuel-powered vehicle, it&rsquo;ll help you save up on gas if you&rsquo;re aware of the possible issues that can cause your ride to consume more fuel. Have these problems right away, so you can have more savings and avoid any hassle while you&rsquo;re driving.<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>There can be many reasons why your vehicle burns more fuel than usual. The issue can be as simple as&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/why-is-my-car-burning-so-much-gas\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":86980,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[3767,53],"tags":[1276,1185,1169,1462,1190,1696,1171],"ppma_author":[2607,3742],"class_list":{"0":"post-86977","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-driving","8":"category-features","9":"tag-air-filter-2","10":"tag-fuel-injector-2","11":"tag-ignition-coil-2","12":"tag-mass-air-flow-sensor-2","13":"tag-oxygen-sensor-2","14":"tag-piston-ring-set","15":"tag-spark-plug-2","16":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why Is My Car Burning So Much Gas? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out what could cause your vehicle to consume more fuel, and learn how you can improve your vehicle\u2019s fuel economy.\" \/>\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.carparts.com\/blog\/why-is-my-car-burning-so-much-gas\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why Is My Car Burning So Much Gas? - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out what could cause your vehicle to consume more fuel, and learn how you can improve your vehicle\u2019s fuel economy.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/why-is-my-car-burning-so-much-gas\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-06T09:42:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-08T02:32:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/fueling-after-car-burns-so-much-gas.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1335\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"CarParts.com Research Team, Anthony Harlin, ASE Certified Master Automobile Technician\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/twitter.com\/CarPartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"CarParts.com Research Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/why-is-my-car-burning-so-much-gas\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/why-is-my-car-burning-so-much-gas\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"1651\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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