{"id":38284,"date":"2021-04-22T04:32:14","date_gmt":"2021-04-22T11:32:14","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=38284"},"modified":"2025-04-11T18:23:25","modified_gmt":"2025-04-12T01:23:25","slug":"what-happens-if-you-put-diesel-in-a-gas-car-or-gas-in-a-diesel-vehicle","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-happens-if-you-put-diesel-in-a-gas-car-or-gas-in-a-diesel-vehicle\/","title":{"rendered":"What Happens if You Put Diesel in a Gas Car or Gas in a Diesel Vehicle?"},"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><style>.kadence-column38284_e3229e-9a > .kt-inside-inner-col,.kadence-column38284_e3229e-9a > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column38284_e3229e-9a > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column38284_e3229e-9a > .kt-inside-inner-col{flex-direction:column;}.kadence-column38284_e3229e-9a > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column38284_e3229e-9a > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column38284_e3229e-9a{position:relative;}@media all and (max-width: 1024px){.kadence-column38284_e3229e-9a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column38284_e3229e-9a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column38284_e3229e-9a inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-c0635b  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-0ba587\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading38284_77e937-57, .wp-block-kadence-advancedheading.kt-adv-heading38284_77e937-57[data-kb-block=\"kb-adv-heading38284_77e937-57\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading38284_77e937-57 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading38284_77e937-57[data-kb-block=\"kb-adv-heading38284_77e937-57\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading38284_77e937-57 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading38284_77e937-57[data-kb-block=\"kb-adv-heading38284_77e937-57\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading38284_77e937-57 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading38284_77e937-57\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>If you add a significant amount of diesel fuel to the gas tank, the car will run until the gasoline is depleted. Because gasoline engines can&rsquo;t combust diesel fuel, the car will eventually stop running.<\/strong><\/li>\n\n\n\n<li>Accidentally adding a significant amount of gasoline to a diesel-powered vehicle can cause the fuel to ignite at the wrong time in the engine&rsquo;s combustion process, leading to costly internal engine damage.<\/li>\n\n\n\n<li>If you accidentally put diesel in a gas-powered vehicle or vice versa, don&rsquo;t start the engine. Have it towed to a repair facility, where the fuel tank can be thoroughly cleaned.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>At most gas stations, diesel fuel nozzles have a different colored handle and a larger-diameter filler pipe than gasoline nozzles. Yet some drivers manage to put diesel fuel in their gas-powered vehicles and vice versa&mdash;and those slip-ups can be costly.<\/p>\n\n\n\n<p>If you&rsquo;ve made this mistake yourself (or you know someone who has), you&rsquo;ll want to know the ramifications of the error, as well as what you should do next.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/man-refueling-car-1024x683.jpg\" alt=\"man refueling car\" class=\"wp-image-38292\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/man-refueling-car-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/man-refueling-car-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/man-refueling-car-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/man-refueling-car-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/man-refueling-car-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/man-refueling-car-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/man-refueling-car-150x100.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">If you add a significant amount of diesel fuel to the gas tank, in most cases, the car will only run until the gasoline in the fuel lines is depleted. The vehicle will then quit because gasoline engines cannot combust diesel fuel.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What Happens if You Put Diesel in a Gas Engine?<\/h2>\n\n\n\n<p>Most diesel fuel pump nozzles have a larger diameter filler pipe than gasoline nozzles, making it tough to put diesel in a gas engine. Still, some drivers manage to fit diesel nozzles into gas tank filler necks.<\/p>\n\n\n\n<p>What might happen if you put diesel in a gas engine and drive the car without realizing your mistake? If you only add a couple of gallons of diesel fuel to a <a href=\"https:\/\/www.carparts.com\/fuel-tank\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"gas tank\">gas tank<\/a> that&rsquo;s at least half full, the engine will usually continue to run but run poorly.<\/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>But if you add a significant amount of diesel fuel to the gas tank, in most cases, the car will only run until the gasoline in the fuel lines is depleted. The vehicle will then quit because gasoline engines cannot combust diesel fuel.<\/p>\n\n\n\n<p>At that point, you&rsquo;ll need to have the vehicle towed to a repair shop so that a professional can drain the fuel tank and flush the fuel system. In some instances, the repair process may involve costly disassembly of major components.<\/p>\n\n\n\n<p>It&rsquo;s also worth noting that running diesel fuel through a gas engine has the potential to cause hydrolock&mdash;a condition where incombustible liquid enters the engine&rsquo;s cylinders, reducing their overall volume. Such a scenario usually results in extensive internal engine damage.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Happens if You Put Gas in a Diesel Engine?<\/h2>\n\n\n\n<p>Gasoline nozzles tend to have smaller diameter filler pipes than diesel nozzles. Because of this, it&rsquo;s easier to put gasoline in a diesel-powered vehicle than the other way around. Some newer diesel-powered vehicles have misfuelling protection devices, but most older models do not.<\/p>\n\n\n\n<p>Putting gasoline in a diesel fuel tank can be an extremely costly mistake. Although diesel-powered vehicles may run well on some alternate fuels, such as biodiesel, they should never be run on gasoline.<\/p>\n\n\n\n<p>Adding only a small amount of gas to a diesel fuel tank might not cause any major problems. But if you put a significant amount of gasoline in a diesel-powered vehicle, there&rsquo;s a good chance the fuel will ignite at the wrong time in the <a href=\"https:\/\/www.carparts.com\/blog\/a-short-course-on-automobile-engines\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"engine&rsquo;s combustion process\">engine&rsquo;s combustion process<\/a>. When that happens, vital (and costly) internal engine components can suffer damage.<\/p>\n\n\n\n<p>What&rsquo;s more, gasoline does not have the lubricating properties that diesel fuel has. Running gasoline through a diesel fuel system can quickly damage major components, such as the high-pressure <a href=\"https:\/\/www.carparts.com\/blog\/common-fuel-pump-symptoms\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel pump\">fuel pump<\/a> and <a href=\"https:\/\/www.carparts.com\/blog\/the-top-6-signs-of-bad-fuel-injectors\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel injectors\">fuel injectors<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/filling-car-with-gas-1024x683.jpg\" alt=\"filling car with gas\" class=\"wp-image-38293\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/filling-car-with-gas-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/filling-car-with-gas-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/filling-car-with-gas-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/filling-car-with-gas-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/filling-car-with-gas-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/filling-car-with-gas-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/filling-car-with-gas-150x100.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">When there&rsquo;s a significant amount of gasoline in a diesel-powered vehicle, there&rsquo;s a good chance the fuel will ignite at the wrong time in the engine&rsquo;s combustion process, causing vital (and costly) internal engine components damage.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What Should You Do if You Put Diesel in a Gas-Powered Car or Vice Versa?<\/h2>\n\n\n\n<p>If you realize you put diesel in a gas-powered car or vice versa, do not start the engine for any reason (not even to move your car away from the <a href=\"https:\/\/www.carparts.com\/fuel-pump\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel pump\">fuel pump<\/a>). Instead, to avoid damaging your vehicle, have it towed to a repair facility to have the fuel tank thoroughly cleaned.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How To Avoid Putting the Wrong Type of Fuel in Your Car<\/h2>\n\n\n\n<p>These days, most gas stations make it fairly easy to avoid putting the wrong type of fuel in your car. The nozzle handles are color-coded&mdash;diesel is usually green, while gasoline (regular, mid-grade, and premium) is usually black. Also, most diesel nozzles have a larger diameter filler pipe than gasoline nozzles do.<\/p>\n\n\n\n<p>There are, however, some older gas stations that might not adhere to these standards. That&rsquo;s why you should always read the label on the pump to ensure you&rsquo;re putting the right fuel in your vehicle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Can a Diesel Nozzle Fit Into a Gas Tank?<\/h2>\n\n\n\n<p>Generally, a diesel fuel nozzle won&rsquo;t fit into a gasoline car&rsquo;s fuel tank because diesel nozzles are larger than the openings for gasoline tanks. It&rsquo;s designed this way to prevent accidentally putting in the incorrect fuel.<\/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>At most gas stations, diesel fuel nozzles have a different colored handle and a larger-diameter filler pipe than gasoline nozzles&#8230;. <a href=\"https:\/\/www.carparts.com\/blog\/what-happens-if-you-put-diesel-in-a-gas-car-or-gas-in-a-diesel-vehicle\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":29,"featured_media":38291,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_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":[53,3768],"tags":[],"ppma_author":[2622],"class_list":{"0":"post-38284","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-features","8":"category-lifestyle","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Happens if You Put Diesel in a Gas Car or Gas in a Diesel Vehicle? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"What might happen if you put diesel in a gas engine by mistake? Our Chief Mechanic explains the likely consequences and what you should do.\" \/>\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\/what-happens-if-you-put-diesel-in-a-gas-car-or-gas-in-a-diesel-vehicle\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Happens if You Put Diesel in a Gas Car or Gas in a Diesel Vehicle? - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"What might happen if you put diesel in a gas engine by mistake? Our Chief Mechanic explains the likely consequences and what you should do.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/what-happens-if-you-put-diesel-in-a-gas-car-or-gas-in-a-diesel-vehicle\/\" \/>\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:published_time\" content=\"2021-04-22T11:32:14+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-04-12T01:23:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/04\/refilling-fuel-tank-of-a-car-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"1388\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-happens-if-you-put-diesel-in-a-gas-car-or-gas-in-a-diesel-vehicle\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-happens-if-you-put-diesel-in-a-gas-car-or-gas-in-a-diesel-vehicle\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"29\",\"name\":\"Mia Bevacqua\",\"jobTitle\":\"ASE Master Automobile Technician\",\"description\":\"Mia Bevacqua has over 14 years of experience in the auto industry and holds a bachelor\u2019s degree in Advanced Automotive Systems. 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