{"id":87098,"date":"2023-07-07T00:45:15","date_gmt":"2023-07-07T07:45:15","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=87098"},"modified":"2026-02-13T22:23:22","modified_gmt":"2026-02-14T06:23:22","slug":"how-and-when-should-you-drain-your-gas-tank","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/how-and-when-should-you-drain-your-gas-tank\/","title":{"rendered":"How and When Should You Drain 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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column87098_660522-56 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column87098_660522-56 > .kt-inside-inner-col,.kadence-column87098_660522-56 > .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-column87098_660522-56 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column87098_660522-56 > .kt-inside-inner-col{flex-direction:column;}.kadence-column87098_660522-56 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column87098_660522-56 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column87098_660522-56{position:relative;}@media all and (max-width: 1024px){.kadence-column87098_660522-56 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column87098_660522-56 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column87098_660522-56 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-8d8f44  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-3b9ea2\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading87098_0653a9-f5, .wp-block-kadence-advancedheading.kt-adv-heading87098_0653a9-f5[data-kb-block=\"kb-adv-heading87098_0653a9-f5\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading87098_0653a9-f5 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading87098_0653a9-f5[data-kb-block=\"kb-adv-heading87098_0653a9-f5\"] 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-heading87098_0653a9-f5 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading87098_0653a9-f5[data-kb-block=\"kb-adv-heading87098_0653a9-f5\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading87098_0653a9-f5 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading87098_0653a9-f5\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Before draining your gas tank, make sure to disconnect the negative battery terminals, find a ventilated area, and prepare fuel storage containers.<\/li>\n\n\n\n<li>You can use a siphon or simply use your fuel tank&rsquo;s drain plug to remove fuel from your tank.<\/li>\n\n\n\n<li>You might need to drain your gas tank if you&rsquo;re correcting a refueling mistake, removing contaminated fuel, fixing a vehicle that&rsquo;s been left in storage, or fuel tank replacement, among other reasons.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Your fuel tank stores the fuel needed by your engine to operate. Most of the time, you&rsquo;ll make sure that the amount of gas in your tank won&rsquo;t fall below a certain level. However, there are times when you&rsquo;ll need to drain it. Here&rsquo;s a quick overview of how to drain your gas tank<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What to Do Before Draining Your Gas Tank<\/h2>\n\n\n\n<p>Before draining your gas tank, here are some things that you should keep in mind and prepare:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Disconnect the Negative Battery Terminals<\/h3>\n\n\n\n<p>Make safety your priority by disconnecting your negative battery terminals. This will ensure that you&rsquo;ll have no issue with sparks and fire while you&rsquo;re trying to drain your battery.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Find a Highly-Ventilated Place<\/h3>\n\n\n\n<p>Fuel is flammable, so it&rsquo;s dangerous to handle it in an enclosed space. Make sure that you keep any flammable materials or electronics that might ignite away from the vehicle.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Prepare Your Storage Containers<\/h3>\n\n\n\n<p>It isn&rsquo;t a bad idea to gather more containers than you actually need. On average, a fuel tank&rsquo;s capacity can be anywhere between 40 and 60 liters. However, this can vary depending on your vehicle&rsquo;s year, make, and model.<\/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\/storage-containers-for-draining-car-fuel-tank-1024x682.jpg\" alt=\"Person,Filling,Gas,Canister,At,Gas,Station\" class=\"wp-image-87110\" style=\"width:1024px;height:682px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/storage-containers-for-draining-car-fuel-tank-1024x682.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/storage-containers-for-draining-car-fuel-tank-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/storage-containers-for-draining-car-fuel-tank-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/storage-containers-for-draining-car-fuel-tank-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/storage-containers-for-draining-car-fuel-tank-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/storage-containers-for-draining-car-fuel-tank-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/storage-containers-for-draining-car-fuel-tank-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/storage-containers-for-draining-car-fuel-tank.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">It isn&rsquo;t a bad idea to gather more containers than you actually need.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Drain a Gas Tank<\/h2>\n\n\n\n<p>There are two ways to drain a fuel tank: siphoning the gas and using the fuel tank drain plug.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Siphoning<\/h3>\n\n\n\n<p>If you&rsquo;re trying to research how to drain gas from a car, you&rsquo;d surely encounter &ldquo;siphoning.&rdquo; This is a method used by seasoned drivers to transfer fuel from one vehicle to another or to a container using a hose and a pump.<\/p>\n\n\n\n<p>You can also purchase a fuel siphon device. It&rsquo;s a clear hose with a valve in the end. You have put the valve end in the fuel tank and push it back and forth. Pushing it forward will allow the valve to open so that fuel can start to make its way up the clear hose. Pulling it back, on the other hand, will close the valve so that air will be blocked. You&rsquo;ll have to repeat this procedure until all the air is gone. This will allow the fuel to drain through the hose.<\/p>\n\n\n\n<p>Some experienced drivers siphon gas using their mouth, but this isn&rsquo;t recommended. You might end up ingesting fuel or inhaling fuel vapors&mdash;both are detrimental to your health.<\/p>\n\n\n\n<p>It&rsquo;s also important to note that modern vehicles can come equipped with an anti-siphon mechanism, making it impossible to suck fuel out of your vehicle.<\/p>\n\n\n\n<p>You can read our <a href=\"https:\/\/www.carparts.com\/blog\/when-and-how-to-siphon-gas-the-complete-guide\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"complete guide on how to siphon gas\">complete guide on how to siphon gas<\/a> to learn more.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use the Fuel Tank Drain Plug<\/h3>\n\n\n\n<p>Some older vehicles come equipped with metal tanks that have drain plugs. If your vehicle has one, you can drain your fuel through the plug.<\/p>\n\n\n\n<p>Here&rsquo;s how to do it:<\/p>\n\n\n\n<p><strong>Step #1<\/strong> Grab your safety glasses and gloves, and, find the location of the gas tank drain plug.<\/p>\n\n\n\n<p><strong>Step #2<\/strong> Chock your front wheels to secure them, and start raising your vehicle using a jack. Make sure that you have enough room to work underneath it.<\/p>\n\n\n\n<p><strong>Step #3<\/strong>&nbsp; Use jack stands to support your vehicle.<\/p>\n\n\n\n<p><strong>Step #4<\/strong> Open the <a href=\"https:\/\/www.carparts.com\/gas-cap\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"gas cap\">gas cap<\/a> to release pressure before trying to loosen the drain plug.<\/p>\n\n\n\n<p><strong>Step #5<\/strong> Put a bucket underneath the tank, and use a ratchet and socket to loosen the plug.<\/p>\n\n\n\n<p>Fuel will now flow freely from your tank to the bucket underneath your vehicle.<\/p>\n\n\n\n<p><strong>Step #6<\/strong>&nbsp; Fuel might spill out of the bucket because of the force of the flow, so make sure you have towels ready to clean it up.<\/p>\n\n\n\n<p><strong>Step #7<\/strong> You can close your gas cap slightly to slow down the flow of fuel.<\/p>\n\n\n\n<p><strong>Step #8<\/strong> Don&rsquo;t forget to replace and tighten the drain plug.<\/p>\n\n\n\n<p>You can also drain your gas tank by disconnecting the fuel supply line from the fuel pump to the engine. Once you turn the key on, fuel will start to push out the line. It&rsquo;ll run for about 30 seconds. Turn the key off again and then turn it back on. If you&rsquo;re not sure about anything, you can always contact a trusted mechanic.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>You can also drain your gas tank by disconnecting the fuel supply line from the fuel pump to the engine. Once you turn the key on, fuel will start to push out the line.<\/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<div class=\"rsi-card\">\n  <div class=\"rsi-thumb\">\n    <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/d_noimage.jpg\/b_white\/e_sharpen,e_auto_brightness,e_auto_contrast\/f_auto\/q_auto:eco,dpr_auto\/w_873,h_873,c_pad\/images\/rm67010002_1\">\n  <\/div>\n  <div class=\"rsi-info\">\n    <span class=\"rsi-title\">The Best Fuel Tank Brands: Smart Picks for Your Fuel System<\/span>\n    <span class=\"rsi-desc\">Compare the top aftermarket fuel tank brands that offer topnotch corrosion resistance and excellent value for your money. <\/span>\n    <a href=\"https:\/\/www.carparts.com\/blog\/the-best-fuel-tank-brands-smart-picks-for-your-fuel-system-quickref\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Discover Your Options\">Discover Your Options<\/a>\n  <\/div>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">When Is It Necessary to Drain Your Gas Tank?<\/h2>\n\n\n\n<p>There can be several reasons why you&rsquo;ll need to drain your tank. Removing wrong or contaminated fuel, sharing your fuel with another vehicle, fuel tank replacement, and tank cleaning are some of the common reasons why it has to be done.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Correcting a Refueling Mistake<\/h3>\n\n\n\n<p>It isn&rsquo;t uncommon for drivers to pump the wrong type of fuel into their vehicles. For example, new drivers can mistakenly top up with gas instead of diesel.<\/p>\n\n\n\n<p>Using the wrong type of fuel can significantly damage your vehicle, so you&rsquo;ll have to drain the wrong fuel to correct the error.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Removing Contaminated Fuel<\/h3>\n\n\n\n<p>Your fuel can be contaminated due to flooding. Water and debris can get into your fuel tank, and you&rsquo;ll have no choice but to drain the fuel.<\/p>\n\n\n\n<p>Take note, however, that even if you drain your fuel, there&rsquo;s no assurance that your vehicle will go back to its optimum condition. You&rsquo;ll have to get it assessed by a trusted mechanic. You can read this <a href=\"https:\/\/www.carparts.com\/blog\/what-to-do-if-your-car-gets-flooded\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"article\">article<\/a> to know more about what to do with a flooded car.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fixing a Vehicle That&rsquo;s Been Left in Storage<\/h3>\n\n\n\n<p>You&rsquo;ll also have to drain your tank if your vehicle was left unused for a long period. If your ride uses unleaded fuel, you&rsquo;ll have to replace it after 3 to 6 months. If you&rsquo;re using diesel, you&rsquo;ll have 6 to 12 months before you&rsquo;ll have to drain and replace the fuel.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Transferring Fuel From One Vehicle to Another<\/h3>\n\n\n\n<p>When you&rsquo;re stuck in the middle of nowhere with no gas station in sight, it&rsquo;s a blessing to meet a stranger who&rsquo;s willing to give you fuel. Before doing anything, make sure that the gas you&rsquo;re about to put in your vehicle is compatible with your make and model.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fuel Tank Replacement<\/h3>\n\n\n\n<p>Some repairs need to be done with an empty tank.&nbsp; A mechanic might also opt to remove the fuel because of health issues. Remember that fuel vapors, when inhaled in large doses, can be very bad for your health.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Tank Cleaning<\/h3>\n\n\n\n<p>This is common for cars that were built in the 1900s. Metal tanks were still used in these times, so it was common for them to rust. Rust can also cause sludge build-up, which can contaminate your fuel. Luckily, modern vehicles usually come with plastic tanks.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Proper Fuel Disposal<\/h2>\n\n\n\n<p>Take your old fuel to your local hazardous waste disposal center. Never pour fuel down your sink because it&rsquo;ll contaminate the sewage system. It&rsquo;s also a bad idea to dispose of it in rivers and ponds because it&rsquo;ll pollute the environment.&nbsp; Be a responsible vehicle owner, and dispose of old or unused fuel properly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Shop For A Replacement Fuel Tank With Just A Few Clicks<\/h2>\n\n\n\n<p>You&rsquo;ll need to drain your fuel tank whenever you need to make necessary repairs. One of these repairs might be replacing an old gas tank or replacing the fuel sending unit or fuel pump. If you need replacement fuel tank components, look no further than CarParts.com.<\/p>\n\n\n\n<p>CarParts.com is a trusted source when it comes to all sorts of vehicle parts. We offer a wide variety of parts for all sorts of makes and models from the most trustworthy aftermarket manufacturers. You can be confident that our parts will fit and function in your vehicle perfectly, as they&rsquo;re made in high-tech manufacturing facilities to the precise specifications of the original part. All our products come with a warranty period of a minimum of 60 days for your peace of mind.<\/p>\n\n\n\n<p>You can replace fuel-related components without breaking the bank. Check out our selection of competitively-priced <a href=\"https:\/\/www.carparts.com\/fuel-pump\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel pumps\">fuel pumps<\/a>, <a href=\"https:\/\/www.carparts.com\/fuel-tank\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel tanks\">fuel tanks<\/a>, and <a href=\"https:\/\/www.carparts.com\/fuel-sending-unit\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel sending units\">fuel sending units<\/a> here at CarParts.com today!<\/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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Your fuel tank stores the fuel needed by your engine to operate. Most of the time, you&rsquo;ll make sure that&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/how-and-when-should-you-drain-your-gas-tank\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":87112,"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":[2607,3742],"class_list":{"0":"post-87098","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 v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How and When Should You Drain Your Gas Tank? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Your fuel tank stores the fuel needed by your engine. 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