{"id":38639,"date":"2021-05-04T03:09:34","date_gmt":"2021-05-04T10:09:34","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=38639"},"modified":"2023-09-29T23:18:30","modified_gmt":"2023-09-30T06:18:30","slug":"what-can-happen-if-theres-water-in-your-gas-tank","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-can-happen-if-theres-water-in-your-gas-tank\/","title":{"rendered":"What Can Happen if There\u2019s Water in Your Gas Tank?"},"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-column_00ea86-ef > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_00ea86-ef > .kt-inside-inner-col,.kadence-column_00ea86-ef > .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-column_00ea86-ef > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_00ea86-ef > .kt-inside-inner-col{flex-direction:column;}.kadence-column_00ea86-ef > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_00ea86-ef > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_00ea86-ef{position:relative;}@media all and (max-width: 1024px){.kadence-column_00ea86-ef > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_00ea86-ef > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_00ea86-ef qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-f2ab75  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-c9c687\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_f3651f-da, .wp-block-kadence-advancedheading.kt-adv-heading_f3651f-da[data-kb-block=\"kb-adv-heading_f3651f-da\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_f3651f-da mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_f3651f-da[data-kb-block=\"kb-adv-heading_f3651f-da\"] 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-heading_f3651f-da img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_f3651f-da[data-kb-block=\"kb-adv-heading_f3651f-da\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_f3651f-da summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_f3651f-da\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Water contamination in the gas tank results in engine performance problems like rough running and stalling.<\/li><li>Contamination has the potential to corrode your vehicle&rsquo;s fuel system components, which means it&rsquo;s a problem that must be dealt with immediately.<\/li><li>The most common symptoms of water in the gas tank include a lit check engine light, a rough running engine, and stalling.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Adding water to your car&rsquo;s <a href=\"https:\/\/www.carparts.com\/fuel-tank\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"gas tank\">gas tank<\/a> can cause a variety of problems. What&rsquo;s more, it&rsquo;s easier for water to get into the fuel system than you might think.<\/p>\n\n\n\n<p>Water can seep into the underground fuel storage tanks at gas stations, then make its way into your gas tank while you&rsquo;re refueling. Although the problem doesn&rsquo;t happen all that often, it&rsquo;s still something that you&rsquo;ll want to be aware of.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/water-in-gas-1024x683.jpg\" alt=\"water in gas\" class=\"wp-image-38648\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/water-in-gas-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/water-in-gas-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/water-in-gas-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/water-in-gas-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/water-in-gas-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/water-in-gas.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Filling up with gasoline that&rsquo;s mixed with water can result in engine performance problems, such as rough running and stalling.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What Happens if You Put Water in a Gas Tank?<\/h2>\n\n\n\n<p>Unless you&rsquo;re itching to get a hefty repair bill from your mechanic, you probably won&rsquo;t be pouring water directly into your car&rsquo;s gas tank anytime soon.<\/p>\n\n\n\n<p>Because most modern cars have a fuel door release button inside of the cabin, it&rsquo;s also unlikely that someone will pour water into your gas tank as an act of vandalism (sugar is more popular for that, anyhow).<\/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 it&rsquo;s not entirely uncommon to get water-contaminated gas at a commercial fueling station. The water can get into the facility&rsquo;s underground storage tanks through seepage, condensation, and other means.<\/p>\n\n\n\n<p>Filling up with gasoline that&rsquo;s mixed with water can result in engine performance problems, such as rough running and stalling. What&rsquo;s more, the contamination can eventually cause costly fuel system components to corrode and fail.<\/p>\n\n\n\n<p>The video below outlines what can happen when you refuel your car with gasoline that&rsquo;s mixed with a significant amount of H2O:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Water in your gas tank? Here's what to do to avoid costly repairs\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/yG32I4tuQRY?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><em><strong>Note:<\/strong> Water-contaminated diesel fuel can be an even bigger problem that can quickly damage major fuel system components, such as the high-pressure fuel pump. Diesel vehicles usually have a water-fuel separator to defend against normal water accumulation.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms of Water in a Gas Tank<\/h2>\n\n\n\n<p>When a significant amount of water has been added to your car&rsquo;s gas tank, you&rsquo;ll likely notice one or more of the following symptoms:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Engine Runs Rough Shortly After Refueling<\/h3>\n\n\n\n<p>Water is a non-combustible liquid that, when drawn into the fuel system, can cause the engine to run rough and misfire. The problem will usually begin shortly after refueling.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vehicle Stalls Shortly After Refueling<\/h3>\n\n\n\n<p>Because a gasoline engine cannot combust water, the vehicle will eventually stall if there&rsquo;s enough H2O in the fuel system.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">The Check Engine Light Illuminates Shortly After Refueling<\/h3>\n\n\n\n<p>Your car&rsquo;s engine computer looks for problems, such as a misfire, that could lead to an increase in tailpipe emissions. If the device notices the engine is misfiring from water-contaminated gasoline, it will <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"turn on the check engine light\">turn on the check engine light<\/a> and store a diagnostic trouble code in memory.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/illuminated-check-engine-light-icon-1024x768.jpg\" alt=\"illuminated check engine light icon\" class=\"wp-image-38649\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/illuminated-check-engine-light-icon-1024x768.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/illuminated-check-engine-light-icon-300x225.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/illuminated-check-engine-light-icon-768x576.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/illuminated-check-engine-light-icon-928x696.jpg 928w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/illuminated-check-engine-light-icon-150x113.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/illuminated-check-engine-light-icon.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>The Check Engine Light will turn on if your PCM notices the engine is misfiring from water-contaminated gasoline.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How Much Water in a Gas Tank is Bad?<\/h2>\n\n\n\n<p>Water in your gas tank is never a good thing. But if there are only trace amounts of water mixed in with the fuel, you may be able to combat the problem by adding dry gas (isopropyl) to your gas tank. <a href=\"https:\/\/www.carparts.com\/blog\/what-is-dry-gas-and-should-you-add-it-to-your-gas-tank\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Dry gas\">Dry gas<\/a> is a product that can help restore combustive properties to gasoline-contaminated water.<\/p>\n\n\n\n<p>Meanwhile, a significant amount of water will usually require draining the fuel tank. You may also end up having to service other <a href=\"https:\/\/www.carparts.com\/blog\/a-short-course-on-fuel-systems\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"parts of the fuel system\">parts of the fuel system<\/a>, especially if you continue driving with water-contaminated fuel.<\/p>\n\n\n\n<p>When in doubt, it&rsquo;s best to have your vehicle looked at by a professional mechanic right away.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Check for Water in Your Gas Tank<\/h2>\n\n\n\n<p>Gasoline weighs approximately six pounds per gallon, whereas water weighs about seven pounds per gallon. Water will visibly separate from gasoline when the two are mixed together.<\/p>\n\n\n\n<p>There are commercial test kits available that allow you to check for water contamination in gasoline. Another less expensive method is to take a fuel sample and place it in a clear container. If there&rsquo;s water in the gasoline, you&rsquo;ll likely see the two liquids separate after sitting for a while, as demonstrated in the video below.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Car Maintenance Tips &amp; Tricks : How to Fix a Car With Water in the Gas Tank\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/yvua0NYdsFw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>Here is another video that demonstrates a different take on the same basic test method:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Testing for Water in Gasoline\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/GFi8Pm4ZJIc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Protect Yourself From Water-Contaminated Gasoline<\/h2>\n\n\n\n<p>There are steps that you can take to protect your car and your wallet against water-contaminated gasoline.<\/p>\n\n\n\n<p>First of all, it&rsquo;s a good idea to purchase your gasoline from busy fueling stations with a high turnover rate. The gasoline at these facilities is more likely to be fresh and free from water contamination.<\/p>\n\n\n\n<p>You&rsquo;ll also want to avoid purchasing gasoline when the tanker is refilling the fueling station&rsquo;s storage tanks. The refilling procedure often stirs up water and other contaminants lingering in the bottom of the underground containers.<\/p>\n\n\n\n<p>Finally, always get a receipt from the fueling station after you purchase gasoline. Doing so will provide you with a path of recourse if you get stuck with water-contaminated fuel.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/woman-refuelling-in-a-gas-station-1024x683.jpg\" alt=\"woman refuelling in a gas station\" class=\"wp-image-38652\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/woman-refuelling-in-a-gas-station-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/woman-refuelling-in-a-gas-station-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/woman-refuelling-in-a-gas-station-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/woman-refuelling-in-a-gas-station-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/woman-refuelling-in-a-gas-station-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/woman-refuelling-in-a-gas-station.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Purchase your gasoline from busy fueling stations with a high turnover rate as they are more likely to be fresh and free from water contamination.<\/figcaption><\/figure>\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>Adding water to your car&rsquo;s gas tank can cause a variety of problems. What&rsquo;s more, it&rsquo;s easier for water to&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/what-can-happen-if-theres-water-in-your-gas-tank\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":38647,"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":[52,3743],"tags":[1198],"ppma_author":[2607,2855],"class_list":{"0":"post-38639","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-maintenance","9":"tag-fuel-tank-2","10":"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 Can Happen if There\u2019s Water in Your Gas Tank? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Water contamination in gasoline doesn&#039;t happen often, but it is still something you need to be aware of. Read on for more info.\" \/>\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-can-happen-if-theres-water-in-your-gas-tank\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Can Happen if There\u2019s Water in Your Gas Tank? - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Water contamination in gasoline doesn&#039;t happen often, but it is still something you need to be aware of. Read on for more info.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/what-can-happen-if-theres-water-in-your-gas-tank\/\" \/>\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=\"2021-05-04T10:09:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-30T06:18:30+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/05\/man-refuelling-car-gas-tank-1024x635.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"635\" \/>\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=\"5 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-can-happen-if-theres-water-in-your-gas-tank\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-can-happen-if-theres-water-in-your-gas-tank\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"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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