{"product_id":"donaldson-dbf6776-blue-fuel-filter-cummins-x15-isx","title":"Donaldson DBF6776 Blue® Fuel Filter | Premium Secondary Fuel Filter for Cummins X15 \u0026 ISX Engines","description":"\u003ch2\u003eDonaldson DBF6776 Blue® Secondary Fuel Filter for Cummins X15 \u0026amp; ISX Engines\u003c\/h2\u003e\n\u003cp\u003eThe Donaldson DBF6776 Blue® Fuel Filter is a premium secondary fuel filter engineered to provide maximum injector protection and superior fuel cleanliness for Cummins X15 and ISX diesel engines. Built with Donaldson's advanced Synteq XP™ synthetic media technology, the DBF6776 delivers significantly cleaner fuel than conventional fuel filters, helping protect expensive fuel system components while reducing maintenance costs and downtime.\u003c\/p\u003e\n\u003cp\u003eModern common rail fuel systems operate under extremely high pressures, making fuel cleanliness more important than ever. The Donaldson Blue® DBF6776 is designed to capture and retain injector-damaging contaminants while maintaining optimal fuel flow and performance. Donaldson states its Blue® fuel filters with Synteq XP™ media can provide fuel up to four times cleaner than leading competitor filters, helping maximize injector life and engine reliability. :contentReference[oaicite:0]{index=0}\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for severe-duty commercial trucking applications, the DBF6776 is a premium upgrade over the standard P555776 fuel filter and is trusted by owner-operators, fleets, and diesel performance shops seeking the highest level of fuel system protection available.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium Donaldson Blue® fuel filter\u003c\/li\u003e\n\u003cli\u003eAdvanced Synteq XP™ synthetic filtration media\u003c\/li\u003e\n\u003cli\u003eProvides fuel up to 4x cleaner than leading competitors\u003c\/li\u003e\n\u003cli\u003eSuperior injector protection\u003c\/li\u003e\n\u003cli\u003eExcellent contaminant retention under vibration\u003c\/li\u003e\n\u003cli\u003eDesigned for severe-duty environments\u003c\/li\u003e\n\u003cli\u003eHelps reduce costly fuel system repairs\u003c\/li\u003e\n\u003cli\u003eSpin-on design for easy installation\u003c\/li\u003e\n\u003cli\u003eFleet-proven Donaldson Blue® performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDonaldson highlights that Blue® fuel filters are designed for superior contaminant capture and retention, especially in demanding heavy-duty applications where vibration can cause inferior filters to release trapped contaminants back into the fuel system.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e DBF6776\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Donaldson Blue®\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Type:\u003c\/strong\u003e Secondary Fuel Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Spin-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Synteq XP™ Synthetic Media\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e M90 x 2 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 118 mm (4.65\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 224 mm (8.82\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Cummins X15 \u0026amp; ISX Engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFleetPride lists the DBF6776 as a 4.65-inch OD spin-on secondary fuel filter with M90 x 2 mm threads designed for heavy-duty diesel fuel systems. \u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eBenefits of Upgrading to Donaldson Blue®\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuperior injector protection\u003c\/li\u003e\n\u003cli\u003eCleaner fuel delivery\u003c\/li\u003e\n\u003cli\u003eReduced fuel system wear\u003c\/li\u003e\n\u003cli\u003eImproved fuel system reliability\u003c\/li\u003e\n\u003cli\u003eExtended component life\u003c\/li\u003e\n\u003cli\u003eReduced maintenance costs\u003c\/li\u003e\n\u003cli\u003eMaximum fleet uptime\u003c\/li\u003e\n\u003cli\u003eEnhanced performance in severe-duty environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCummins X15 Engines\u003c\/li\u003e\n\u003cli\u003eCummins ISX Engines\u003c\/li\u003e\n\u003cli\u003eFreightliner Cascadia\u003c\/li\u003e\n\u003cli\u003ePeterbilt 579\u003c\/li\u003e\n\u003cli\u003ePeterbilt 389\u003c\/li\u003e\n\u003cli\u003eKenworth T680\u003c\/li\u003e\n\u003cli\u003eKenworth W990\u003c\/li\u003e\n\u003cli\u003eKenworth W900\u003c\/li\u003e\n\u003cli\u003eInternational LT Series\u003c\/li\u003e\n\u003cli\u003eWestern Star Trucks\u003c\/li\u003e\n\u003cli\u003eCommercial Fleet Operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDonaldson specifically references Cummins X15 and ISX applications for the DBF6776 platform. \u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eMajor Cross Reference Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDonaldson P555776\u003c\/li\u003e\n\u003cli\u003eCummins 5365988\u003c\/li\u003e\n\u003cli\u003eCummins 4331007\u003c\/li\u003e\n\u003cli\u003eFleetguard FF1219\u003c\/li\u003e\n\u003cli\u003eBaldwin BF9885\u003c\/li\u003e\n\u003cli\u003eTruckPro DNDBF6776\u003c\/li\u003e\n\u003cli\u003eDonaldson P556776\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe DBF6776 serves as the premium Donaldson Blue® upgrade for the standard P555776 fuel filter used in many Cummins fuel system applications. \u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhy Premium Fuel Filtration Matters\u003c\/h3\u003e\n\u003cp\u003eFuel injectors for modern Cummins X15 and ISX engines can cost thousands of dollars to replace. Even microscopic contaminants can damage injector tips, reduce fuel atomization, and negatively impact fuel economy and performance. Premium synthetic media filtration helps remove these contaminants before they reach sensitive fuel system components.\u003c\/p\u003e\n\u003cp\u003eMany diesel technicians recommend premium filtration and shorter service intervals as one of the most effective ways to extend fuel system life and prevent expensive repairs. Community discussions among diesel owners frequently emphasize the importance of maintaining clean fuel and replacing fuel filters before restriction becomes excessive.\u003c\/p\u003e\n\u003chr\u003e\n\u003cdiv style=\"background: #f8f8f8; padding: 25px; border-left: 4px solid #ff6a00; margin: 25px 0;\"\u003e\n\u003ch3\u003e🔥 High Conversion Add-On: Upgrade Beyond Standard Fuel Filters\u003c\/h3\u003e\n\u003cp\u003eThe Donaldson DBF6776 is not simply a replacement fuel filter—it's a premium upgrade designed for operators who demand maximum fuel system protection. With advanced Synteq XP™ synthetic media, the DBF6776 helps deliver cleaner fuel, improved injector protection, and greater reliability than conventional fuel filters.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e✔ Premium Donaldson Blue® Technology\u003c\/li\u003e\n\u003cli\u003e✔ Synteq XP™ Synthetic Media\u003c\/li\u003e\n\u003cli\u003e✔ Cummins X15 \u0026amp; ISX Compatible\u003c\/li\u003e\n\u003cli\u003e✔ Superior Injector Protection\u003c\/li\u003e\n\u003cli\u003e✔ Extended Fuel System Life\u003c\/li\u003e\n\u003cli\u003e✔ Fleet-Proven Performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cdiv style=\"background: #fff7ef; padding: 20px; border: 1px solid #ffb366; border-radius: 8px; margin-top: 20px;\"\u003e\n\u003ch3\u003e🚛 Frequently Purchased Together\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✔ Donaldson DBL7900 Blue® Oil Filter\u003c\/li\u003e\n\u003cli\u003e✔ Donaldson P583177 Fuel Filter\u003c\/li\u003e\n\u003cli\u003e✔ Donaldson P559674 Service Kit\u003c\/li\u003e\n\u003cli\u003e✔ Cummins X15 Air Filters\u003c\/li\u003e\n\u003cli\u003e✔ Crankcase Ventilation Filters\u003c\/li\u003e\n\u003cli\u003e✔ Premium Diesel Engine Oil\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eComplete your preventive maintenance service with premium Donaldson Blue® filtration for maximum engine and fuel system protection.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Donaldson","offers":[{"title":"Default Title","offer_id":66908465365037,"sku":null,"price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/4526\/0845\/files\/donaldson-dbf6776-blue-fuel-filter-premium-secondary-fuel-filter-for-cummins-x15-isx-enginesdonaldsonperformance-diesel-group-6569395.jpg?v=1782860946","url":"https:\/\/performancedieselgroup.com\/products\/donaldson-dbf6776-blue-fuel-filter-cummins-x15-isx","provider":"Performance Diesel Group","version":"1.0","type":"link"}