{"id":122158,"date":"2026-02-12T16:10:03","date_gmt":"2026-02-12T14:10:03","guid":{"rendered":"https:\/\/vetus.com\/blog\/blog-marine-diesel-engine-maintenance-guide\/"},"modified":"2026-03-04T14:06:24","modified_gmt":"2026-03-04T12:06:24","slug":"blog-marine-diesel-engine-maintenance-guide","status":"publish","type":"page","link":"https:\/\/vetus.com\/fi\/blog\/blog-marine-diesel-engine-maintenance-guide\/","title":{"rendered":"Blog: M-LINE maintenance guide"},"content":{"rendered":"\n<section class=\"section  \">\n    \n\n<section id=\"section-text-block-block_1791b34b069f186296c0e6c7bc321065\" class=\"section text-block \">\n                    <div class=\"section section__body\">\n            <div class=\"text-block\">\n                <div class=\"container\">\n                    <div class=\"row\">\n                        <div class=\"col-lg-8 offset-lg-2\">\n                                                            <div class=\"section__content single__content hentry\">\n                                    <p>Regular maintenance is essential to keep your <strong>VETUS marine diesel engine<\/strong> running smoothly, efficiently, and reliably. One of the most important service tasks is replacing the <strong>oil filter, fuel filter, and air filter<\/strong> at the recommended intervals.<\/p>\n<p>In this guide, we explain how to replace oil, fuel, and air filters on a VETUS marine diesel engine, why it matters, and how to avoid common mistakes.<\/p>\n                                <\/div>\n                            \n                                                            <div class=\"section__actions text-block__actions actions\">\n                                    <div class=\"btn-group d-flex flex-wrap justify-content-center\">\n                                                                                    <a href=\"https:\/\/webshop.vetus.com\/en\/products\/spare-parts\/engine-spare-parts\" class=\"btn btn-primary\" title=\"\" target=\"\">\n                                                <span>View VETUS engine service kit<\/span>\n                                            <\/a>\n                                        \n                                                                            <\/div>\n                                <\/div>\n                                                    <\/div>\n                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/section><\/section>\n\n<section class=\"section section--colored bg-light content-blocks bg-light   \">\n    \n\n<section id=\"section-text-block-block_55e0de4f4b8db4077b28d30916e3f3ae\" class=\"section text-block \">\n                    <div class=\"section section__body\">\n            <div class=\"text-block\">\n                <div class=\"container\">\n                    <div class=\"row\">\n                        <div class=\"col-lg-8 offset-lg-2\">\n                                                            <div class=\"section__content single__content hentry\">\n                                    <h4><strong>Why is filter replacement important for a marine diesel engine?<\/strong><\/h4>\n<p>Your marine diesel engine operates in a demanding environment. Clean oil, fuel, and air are critical for optimal performance and longevity.<\/p>\n<ul>\n<li><strong>Oil filter<\/strong> \u2013 Removes contaminants and metal particles from engine oil.<\/li>\n<li><strong>Fuel filter<\/strong> \u2013 Protects the fuel injection system from dirt and water.<\/li>\n<li><strong>Air filter<\/strong> \u2013 Prevents debris and dust from entering the combustion chamber.<\/li>\n<\/ul>\n<p>Failing to replace these filters can lead to:<\/p>\n<ul>\n<li>Reduced engine performance<\/li>\n<li>Higher fuel consumption<\/li>\n<li>Increased engine wear<\/li>\n<li>Hard starting or engine failure<\/li>\n<\/ul>\n<p>Routine marine diesel engine maintenance prevents costly breakdowns at sea.<\/p>\n<h4><strong>How often should you replace filters on a VETUS marine diesel engine?<\/strong><\/h4>\n<p>Service intervals may vary by model, but general recommendations are:<\/p>\n<ul>\n<li><strong>Engine oil &amp; oil filter<\/strong>: Every 100 operating hours or once per year<\/li>\n<li><strong>Fuel filter<\/strong>: Annually or sooner if contaminated fuel is suspected<\/li>\n<li><strong>Air filter<\/strong>: Inspect during every service and replace when dirty<\/li>\n<\/ul>\n<p>Always refer to your specific VETUS engine manual for exact service intervals.<\/p>\n                                <\/div>\n                            \n                                                    <\/div>\n                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/section><\/section>\n\n\n<section class=\"section  \">\n    \n<section id=\"content-block-1-block_b82640c9ecfe796879f784c57abfa3ff\" class=\"section content-block content-block--image \">\n    <div class=\"container\">\n        <div class=\"row d-flex align-items-center flex-md-row-reverse\">\n\n            <div class=\"col-md-6 col-lg-7 offset-lg-1\">\n                                    <div class=\"content-block__visuals\">\n                        <div class=\"content-block__media media--clipped media ratio\">\n                            <div class=\"media__wrapper\">\n                                <img decoding=\"async\" width=\"690\" height=\"388\" src=\"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-690x388.png\" class=\"media__source img-fit\" alt=\"\" srcset=\"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-690x388.png 690w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-300x169.png 300w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-768x432.png 768w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-210x118.png 210w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-330x186.png 330w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-431x242.png 431w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-507x285.png 507w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-530x298.png 530w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-930x523.png 930w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981-1170x658.png 1170w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h34m06s981.png 1280w\" sizes=\"auto, (max-width: 575.98px) 431px, (max-width: 767.98px) 530px, (max-width: 991.98px) 330px, (max-width: 1279.98px) 530px, (max-width: 1899.98px) 690px, 930px\" loading=\"lazy\" \/>                            <\/div>\n                        <\/div>\n                    <\/div>\n                            <\/div>\n\n            <div class=\"col-md-6 col-lg-4\">\n                <div class=\"content-block__body\">\n                    \n                    \n                                            <h4><strong>Step-by-step: Replacing the oil and oil filter<\/strong><\/h4>\n<h5><strong>Tools and materials needed<\/strong><\/h5>\n<ul>\n<li>Genuine VETUS oil filter<\/li>\n<li>Marine diesel engine oil (correct grade)<\/li>\n<li>Oil extraction pump or drain pan<\/li>\n<li>Oil filter wrench<\/li>\n<li>Clean rags<\/li>\n<li>Protective gloves<\/li>\n<\/ul>\n<h5><strong>Step 1: Drain the engine oil<\/strong><\/h5>\n<ol>\n<li>Run the engine briefly to warm the oil.<\/li>\n<li>Turn off the engine.<\/li>\n<li>Extract the oil using a pump or drain via the sump.<\/li>\n<li>Dispose of used oil according to environmental regulations.<\/li>\n<\/ol>\n<p>Proper disposal of marine engine oil is essential for environmental protection.<\/p>\n<h5><strong>Step 2: Replace the oil filter<\/strong><\/h5>\n<ol>\n<li>Remove the old oil filter using a filter wrench.<\/li>\n<li>Check that the old gasket is not stuck to the engine block.<\/li>\n<li>Lightly coat the new filter gasket with clean engine oil.<\/li>\n<li>Install the new filter hand-tight (do not overtighten).<\/li>\n<li>Refill the engine with fresh oil.<\/li>\n<li>Start the engine and check for leaks.<\/li>\n<\/ol>\n<p>Recheck oil level and top up if necessary.<\/p>\n                    \t\t\t\t\t\n                                    <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/section><\/section>\n\n<section class=\"section section--colored bg-light content-blocks bg-light   \">\n    \n<section id=\"content-block-1-block_bce40e396a945f498806597b12ea4a27\" class=\"section content-block content-block--image \">\n    <div class=\"container\">\n        <div class=\"row d-flex align-items-center\">\n\n            <div class=\"col-md-6 col-lg-7\">\n                                    <div class=\"content-block__visuals\">\n                        <div class=\"content-block__media media--clipped media ratio\">\n                            <div class=\"media__wrapper\">\n                                <img decoding=\"async\" width=\"690\" height=\"388\" src=\"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-690x388.png\" class=\"media__source img-fit\" alt=\"\" srcset=\"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-690x388.png 690w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-300x169.png 300w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-768x432.png 768w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-210x118.png 210w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-330x186.png 330w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-431x242.png 431w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-507x285.png 507w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-530x298.png 530w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-930x523.png 930w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110-1170x658.png 1170w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h06m17s110.png 1280w\" sizes=\"auto, (max-width: 575.98px) 431px, (max-width: 767.98px) 530px, (max-width: 991.98px) 330px, (max-width: 1279.98px) 530px, (max-width: 1899.98px) 690px, 930px\" loading=\"lazy\" \/>                            <\/div>\n                        <\/div>\n                    <\/div>\n                            <\/div>\n\n            <div class=\"col-md-6 col-lg-4 offset-lg-1\">\n                <div class=\"content-block__body\">\n                    \n                    \n                                            <h4><strong>Step-by-step: Replacing the fuel filter<\/strong><\/h4>\n<h5><strong>Why fuel filter maintenance is critical in marine diesel engines<\/strong><\/h5>\n<p>Marine diesel engines are highly sensitive to air in the fuel system. After replacing the fuel filter, the system must be properly bled to ensure smooth operation.<\/p>\n<h5><strong>Step 1: Remove the old fuel filter<\/strong><\/h5>\n<ol>\n<li>Close the fuel shut-off valve if fitted.<\/li>\n<li>Remove the old filter.<\/li>\n<li>Clean the mounting surface.<\/li>\n<\/ol>\n<h5><strong>Step 2: Install the new fuel filter<\/strong><\/h5>\n<ol>\n<li>Pre-fill the new filter with clean diesel if recommended.<\/li>\n<li>Lubricate the gasket with diesel fuel.<\/li>\n<li>Install the filter hand-tight.<\/li>\n<\/ol>\n<h5><strong>Step 3: Bleed the fuel system<\/strong><\/h5>\n<ol>\n<li>Use the manual priming pump.<\/li>\n<li>Pump until fuel flows without air bubbles.<\/li>\n<li>Start the engine.<\/li>\n<li>Inspect for leaks and smooth running.<\/li>\n<\/ol>\n<p>Air in the fuel system can cause hard starting or stalling.<\/p>\n                    \t\t\t\t\t\n                                    <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/section><\/section>\n\n\n<section class=\"section  \">\n    \n<section id=\"content-block-1-block_55eb78981f19f576354f255e5efe721f\" class=\"section content-block content-block--image \">\n    <div class=\"container\">\n        <div class=\"row d-flex align-items-center flex-md-row-reverse\">\n\n            <div class=\"col-md-6 col-lg-7 offset-lg-1\">\n                                    <div class=\"content-block__visuals\">\n                        <div class=\"content-block__media media--clipped media ratio\">\n                            <div class=\"media__wrapper\">\n                                <img decoding=\"async\" width=\"690\" height=\"388\" src=\"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-690x388.png\" class=\"media__source img-fit\" alt=\"\" srcset=\"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-690x388.png 690w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-300x169.png 300w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-768x432.png 768w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-210x118.png 210w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-330x186.png 330w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-431x242.png 431w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-507x285.png 507w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-530x298.png 530w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-930x523.png 930w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800-1170x658.png 1170w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-12h38m33s800.png 1280w\" sizes=\"auto, (max-width: 575.98px) 431px, (max-width: 767.98px) 530px, (max-width: 991.98px) 330px, (max-width: 1279.98px) 530px, (max-width: 1899.98px) 690px, 930px\" loading=\"lazy\" \/>                            <\/div>\n                        <\/div>\n                    <\/div>\n                            <\/div>\n\n            <div class=\"col-md-6 col-lg-4\">\n                <div class=\"content-block__body\">\n                    \n                    \n                                            <h4><strong>Step-by-step: Replacing the air filter<\/strong><\/h4>\n<p>The air filter replacement is quick but essential.<\/p>\n<ol>\n<li>Remove the air filter housing cover.<\/li>\n<li>Take out the old filter.<\/li>\n<li>Clean the housing if necessary.<\/li>\n<li>Install the new air filter.<\/li>\n<li>Secure the housing properly.<\/li>\n<\/ol>\n<p>A clean air filter ensures proper combustion and optimal fuel efficiency.<\/p>\n                    \t\t\t\t\t\n                                    <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/section><\/section>\n\n<section class=\"section section--colored bg-light content-blocks bg-light   \">\n    \n\n<section id=\"section-text-block-block_5cf6841af1510abec482ffd39c0d612a\" class=\"section text-block \">\n                    <div class=\"section section__body\">\n            <div class=\"text-block\">\n                <div class=\"container\">\n                    <div class=\"row\">\n                        <div class=\"col-lg-8 offset-lg-2\">\n                                                            <div class=\"section__content single__content hentry\">\n                                    <h5><strong>Common mistakes to avoid during marine engine maintenance<\/strong><\/h5>\n<ul>\n<li>Overtightening filters<\/li>\n<li>Forgetting to lubricate gaskets<\/li>\n<li>Not bleeding the fuel system<\/li>\n<li>Using incorrect oil specifications<\/li>\n<li>Skipping post-service leak checks<\/li>\n<\/ul>\n<p>Attention to detail ensures reliable marine diesel engine performance.<\/p>\n                                <\/div>\n                            \n                                                    <\/div>\n                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/section><\/section>\n\n\n<section class=\"section  \">\n    \n\n<section id=\"section-text-block-block_c633143ef1ef88f42234faa3026f31e6\" class=\"section text-block \">\n                    <div class=\"section section__body\">\n            <div class=\"text-block\">\n                <div class=\"container\">\n                    <div class=\"row\">\n                        <div class=\"col-lg-8 offset-lg-2\">\n                                                            <div class=\"section__content single__content hentry\">\n                                    <h3><strong>Frequently asked questions (FAQ)<\/strong><\/h3>\n<p><strong>Can I replace VETUS marine diesel filters myself?<\/strong><\/p>\n<p>Yes, replacing oil, fuel, and air filters is a manageable DIY task if you follow the proper steps and use genuine parts.<\/p>\n<p><strong>Should I use original VETUS filters?<\/strong><\/p>\n<p>Using genuine VETUS filters ensures proper fit, optimal filtration, and maintains warranty compliance.<\/p>\n<p><strong>What happens if I don\u2019t bleed the fuel system?<\/strong><\/p>\n<p>Air trapped in the fuel system can prevent the engine from starting or cause rough running.<\/p>\n<p>&nbsp;<\/p>\n<h4><strong>Conclusion: Keep your VETUS marine diesel engine reliable<\/strong><\/h4>\n<p>Replacing the oil, fuel, and air filters on your VETUS marine diesel engine is essential preventive maintenance. Regular servicing improves performance, extends engine life, and reduces the risk of breakdowns while underway.<\/p>\n<p>By following these steps, you ensure your marine engine remains reliable season after season.<\/p>\n                                <\/div>\n                            \n                                                            <div class=\"section__actions text-block__actions actions\">\n                                    <div class=\"btn-group d-flex flex-wrap justify-content-center\">\n                                                                                    <a href=\"https:\/\/webshop.vetus.com\/en\/products\/spare-parts\/engine-spare-parts\" class=\"btn btn-primary\" title=\"\" target=\"\">\n                                                <span>View VETUS engine service kit<\/span>\n                                            <\/a>\n                                        \n                                                                            <\/div>\n                                <\/div>\n                                                    <\/div>\n                    <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/section><\/section>\n\n\n<section class=\"section  \">\n    \n<section id=\"content-block-2-block_4de4edac81d649b897c412a2add144ad\" class=\"section content-block content-block--video \">\n    <div class=\"container\">\n        <div class=\"row d-flex align-items-center\">\n            <div class=\"col-md-6 col-lg-7\">\n\n                <div class=\"content-block__visuals\">\n                                            <div class=\"content-block__media media ratio\">\n                            <div class=\"media__wrapper\" x-data=\"video\">\n                                <div class=\"video-overlay video-overlay--cookies\" x-show=\"!cookiesAccepted\" x-cloak>\n                                    <span class=\"d-flex\">Please <a href=\"#\" class=\"mx-1\" @click.prevent=\"acceptCookies()\">accept<\/a> the advertisement cookie.<\/span>\n                                <\/div>\n                                <div class=\"video-overlay\" :class=\"{ 'is-hidden' : isPlaying }\" @click.prevent=\"playVideo\">\n                                    <button class=\"video-overlay__button btn btn-lg btn-outline-primary btn-icon-only\" type=\"button\">\n                                        <span class=\"sr-only\">Toista video<\/span>\n                                        <i class=\"icon icon-play_arrow\"><\/i>\n                                    <\/button>\n                                    <img decoding=\"async\" width=\"690\" height=\"388\" src=\"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-690x388.png\" class=\"media__source img-fit\" alt=\"\" srcset=\"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-690x388.png 690w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-300x169.png 300w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-768x432.png 768w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-210x118.png 210w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-330x186.png 330w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-431x242.png 431w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-507x285.png 507w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-530x298.png 530w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-930x523.png 930w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-1170x658.png 1170w, https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940.png 1280w\" sizes=\"auto, (max-width: 575.98px) 431px, (max-width: 767.98px) 530px, (max-width: 991.98px) 330px, (max-width: 1279.98px) 530px, (max-width: 1899.98px) 690px, 930px\" loading=\"lazy\" \/>                                <\/div>\n                                <div class=\"video video--youtube\" data-video=\"OszAlv3dGYc\"><\/div>\n                            <\/div>\n                        <\/div>\n                                    <\/div>\n            <\/div>\n\n            <div class=\"col-md-6 col-lg-4 offset-lg-1\">\n                <div class=\"content-block__body\">\n                                            <h3 class=\"content-block__title\">\n                            Discover all the details in our video                        <\/h3>\n                    \n                    \n                                            <p>Want to see the full process in action? Watch our complete step-by-step video tutorial.<\/p>\n<p><em><strong data-start=\"247\" data-end=\"286\">Technical validation and execution: <\/strong>Geert-Jan: Instructor &amp; Technical Trainer at VETUS<\/em><\/p>\n                    \n                    \n                <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/section><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":26,"featured_media":0,"parent":59196,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"tpl-blog-large-header.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-122158","page","type-page","status-publish","hentry"],"acf":{"image":{"ID":121860,"id":121860,"title":"vlcsnap-2026-02-12-14h31m00s940","filename":"vlcsnap-2026-02-12-14h31m00s940.png","filesize":1186007,"url":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940.png","link":"https:\/\/vetus.com\/fi\/blog\/blog-marine-diesel-engine-maintenance-guide\/vlcsnap-2026-02-12-14h31m00s940-2\/","alt":"","author":"26","description":"","caption":"","name":"vlcsnap-2026-02-12-14h31m00s940-2","status":"inherit","uploaded_to":122158,"date":"2026-02-12 13:31:20","modified":"2026-02-12 13:31:20","menu_order":0,"mime_type":"image\/png","type":"image","subtype":"png","icon":"https:\/\/vetus.com\/wp-includes\/images\/media\/default.png","width":1280,"height":720,"sizes":{"thumbnail":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-150x150.png","thumbnail-width":150,"thumbnail-height":150,"medium":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-300x169.png","medium-width":300,"medium-height":169,"medium_large":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-768x432.png","medium_large-width":768,"medium_large-height":432,"large":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940.png","large-width":1024,"large-height":576,"1536x1536":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940.png","1536x1536-width":1280,"1536x1536-height":720,"2048x2048":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940.png","2048x2048-width":1280,"2048x2048-height":720,"210w":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-210x118.png","210w-width":210,"210w-height":118,"330w":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-330x186.png","330w-width":330,"330w-height":186,"431w":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-431x242.png","431w-width":431,"431w-height":242,"507w":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-507x285.png","507w-width":507,"507w-height":285,"530w":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-530x298.png","530w-width":530,"530w-height":298,"690w":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-690x388.png","690w-width":690,"690w-height":388,"930w":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-930x523.png","930w-width":930,"930w-height":523,"1170w":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940-1170x658.png","1170w-width":1170,"1170w-height":658,"gform-image-choice-sm":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940.png","gform-image-choice-sm-width":300,"gform-image-choice-sm-height":169,"gform-image-choice-md":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940.png","gform-image-choice-md-width":400,"gform-image-choice-md-height":225,"gform-image-choice-lg":"https:\/\/vetus.com\/wp-content\/uploads\/vlcsnap-2026-02-12-14h31m00s940.png","gform-image-choice-lg-width":600,"gform-image-choice-lg-height":338}},"introduction":"A Step-by-Step Guide to VETUS Marine Diesel Engine Maintenance\r\n","person":false,"title":"How to Replace Oil, Fuel, and Air Filters"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Blog: M-LINE maintenance guide - VETUS<\/title>\n<meta name=\"description\" content=\"Discover a practical step-by-step guide to marine diesel engine maintenance. 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