Doc's Diesel Fuel Water Separator for 6.7L Cummins RAM 2013–2018 — 2-Pack High‑Efficiency Water & Particulate Filtration

Doc's Diesel Fuel Water Separator is a direct-fit replacement that removes water and particulate from diesel fuel for 2013–2018 RAM 6.7L Cummins trucks.

If you own a 2013–2018 RAM 2500, 3500, 4500, or 5500 with the 6.7L Cummins, this pair of Doc's Diesel fuel/water separators is built to match factory fit and filtration performance. Each kit includes two separators and covers common OEM cross-references like Mopar 68157291AA, Wix 33255, Fram CS11037, Baldwin PF9870, Premium Guard DF8606, and Purolator F36294. Independently tested efficiency numbers show DGF410 at 98.49% down to 4 microns and DGF401 at 93.48% down to 3 microns, delivering reliable contaminant removal while maintaining fuel flow for heavy-duty use.

How does this separator protect my Cummins fuel system?

The separator captures free water and filters out particles that can damage injectors, pumps, and sensors. Removing water prevents corrosion and microbial growth in fuel lines while the filter media traps dirt and rust.

• Dual function: water separation plus particulate filtration
• Lab-tested micron efficiency: DGF410 and DGF401 ratings
• Reduces injector wear and fuel system corrosion risk

Will this part fit my RAM 2500/3500/4500/5500 6.7L Cummins?

Doc's Diesel engineered these separators as direct-fit replacements for 2013–2018 6.7L Cummins models. Fitment covers a range of RAM heavy-duty chassis, but you should verify your year and configuration with the fitment card on the product page before ordering.

• Designed for 2013–2018 RAM 6.7L Cummins applications
• Compatible with listed OEM cross-reference SKUs
• Includes two separators to support scheduled servicing

How often should I replace the fuel/water separator?

Service frequency depends on driving conditions and manufacturer recommendations. Typical replacement intervals are every 5,000–10,000 miles, with 15,000 miles being the maximum interval under light conditions; inspect more often if you use low-quality or biodiesel blends.

• Standard recommendation: 5,000–10,000 miles
• Maximum under light use: 15,000 miles
• Check and replace sooner if fuel contamination or water is detected

What does the package include and how does it compare to OEM options?

The kit ships with two Doc's Diesel fuel/water separators built to match OEM dimensions and filtration performance. Independent testing shows high micron-capture rates comparable to premium aftermarket and OEM parts, offering dependable protection at competitive pricing.

• Includes two separators: DGF410 and DGF401 equivalents
• Cross-references to Mopar, Wix, Fram, Baldwin, Premium Guard, Purolator
• Tested efficiencies provided for performance transparency

Who is this for: This product is intended for RAM owners and fleet managers running 6.7L Cummins engines from model years 2013–2018 who need a reliable, direct-fit fuel/water separator to protect their fuel system. It's suitable for daily drivers, work trucks, and fleets that follow manufacturer maintenance intervals or operate in regions where fuel contamination and water ingress are concerns. Use the fitment card to confirm compatibility before purchase and replace per recommended service intervals to maintain fuel system reliability.