2011-2016 F-Super Duty – 6.7L Diesel – First Fit (FF) Markings on Diesel Fuel Conditioning Module (DFCM) – Fuel Filter Usage And/Or Replacement
2011-2016 Model Year F-250-550 Super-Duty trucks equipped with 6.7L Engines have Diesel Fuel Conditioning Module (DFCM) filters marked with Factory Installed FI identification on the filter end cap.
Factory Installed FI filters are only available as original equipment filters in the DFCM from vehicle production assembly plant or in new DFCM service assemblies.
Factory Installed FI fuel filter identification should be used by Dealers to confirm customers are following required DFCM filter change intervals.
Frame mounted DFCM filter should be replaced to recommended service interval and/or depending on vehicle usage profile (Normal/Severe/Extreme) and fuel quality.
Reference Diesel Supplement for required vehicle filter maintenance intervals and information.
- The world’s #1 fuel additive for both gasoline and diesel engines
- A great tune-up in a bottle – treats gasoline, diesel fuel and increases MPG
- Cleans and lubricates the fuel system, including fuel injectors, carburetor and combustion chamber
- Improves fuel economy by burning excess exhaust emissions
- Increases power and acceleration by improving fuel flow and reducing deposit buildup
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API
- Stiction Eliminator for engine oil reduces wear while restoring compression and power
- Stiction Eliminator protects rings, injectors and turbo - anything that the oil touche
- Diesel Extreme cleans injector tips and disperses moisture
- Diesel Extreme fuel system cleaner restores throttle and boosts cetane up 7 points
Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
- Prevents fuel gelling
- Protects against fuel-filter icing
- Boosts cetane for faster cold starts
- Contains Slickdiesel Lubricator to protect fuel pumps and injectors from increased wear caused by poor quality Ultra Low Sulfur Diesel (ULSD) fuel
- Effective in all diesel fuels, including ULSD and biodiesel blends
Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API
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