Doc's Diesel Filter Maintenance Kit for 6.7L Cummins RAM 2013–2018 — Fuel, Oil, Engine & Cabin Filters, OE-fit

Doc's Diesel Filter Maintenance Kit is a complete, vehicle-specific service set that replaces fuel water separators, oil, engine air, and cabin air filters for 2013–2018 6.7L Cummins RAM trucks.

This maintenance kit groups all the filtration components needed for a typical service into one matched package so you can refresh your truck's filtration system in a single visit. Each filter in the set is designed and tested to meet or exceed original equipment standards for fit and filtration efficiency. The kit saves time on parts sourcing and reduces the risk of mixing incompatible filter types while providing measurable particle and water removal performance.

What exactly comes in this kit and why is each part included?

The kit includes the fuel water separators DGF410 and DGF401, oil filter D5335, engine air filter DPA6314, and cabin air filter D3705. These components cover fuel conditioning, crankcase protection, intake air cleanliness, and in-cab air quality—so a single order completes the scheduled maintenance for the 6.7L Cummins application.

• DGF410 & DGF401 fuel water separators — remove water and particulates from diesel before the injectors.
• D5335 oil filter — captures fine metal and soot particles to protect engine bearings and components.
• DPA6314 engine air filter — prevents dust and debris from entering the combustion chamber.
• D3705 cabin air filter — improves in-cab air quality and HVAC performance.

How effective are the filters at removing contaminants?

Each filter in this lineup has documented lab performance: the fuel water separators are independently tested for high efficiency down to small particle sizes, and the oil filter captures the majority of fine contaminants to help protect internal engine parts. These efficiencies reflect the filters’ ability to trap particulate and separate water from diesel before it reaches sensitive systems.

• Fuel/water separators tested to approximately 96.92% efficiency down to 3 microns.
• Oil filter rated to about 99% efficiency for fine particle capture.
• Engine air and cabin filters engineered to block common road dust and pollen.

How often should I change these filters on my 2013–2018 6.7L Cummins?

Follow your vehicle manufacturer’s intervals for warranty compliance, but typical guidance for separators and fuel filters is more frequent service in heavy-duty or contaminated-fuel environments. Fuel/water separators often require change every 5,000–10,000 miles, with a practical maximum of 15,000 miles depending on conditions and fuel quality.

• Check owner’s manual for oil and air filter intervals tied to mileage and driving conditions.
• Replace fuel/water separators every 5,000–10,000 miles under normal conditions.
• Shorten intervals if you frequently operate in dusty environments or with uncertain fuel sources.

Will these filters fit my specific RAM configuration?

The kit is built for 6.7L Cummins-equipped Ram trucks from model years 2013 through 2018, and each component is matched to that application for proper fit and function. Before ordering, use the fitment verification tool on the product page to confirm year and exact configuration so you receive the correct parts.

• Designed to meet or exceed OE fit and filtration specifications for 2013–2018 6.7L Cummins.
• Includes a fitment card recommendation—verify year and configuration prior to purchase.
• One kit covers all common service filters for a full maintenance session.

Who is this for: This maintenance kit is intended for owners, fleet managers, and technicians who service 2013–2018 Ram trucks equipped with the 6.7L Cummins engine and want a single, tested kit to complete scheduled filtration maintenance. It’s particularly useful for those who value matched components, verified efficiencies, and the convenience of one-stop purchasing for fuel, oil, engine air, and cabin air filters.