Best Fuel Filters for Diesel of 2026

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 21, 2026

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Fuel filters for diesel are essential components in any diesel engine. They are designed to prevent harmful contaminants such as dirt, rust, and water from entering the engine and causing damage. Diesel fuel filters work by trapping these contaminants and preventing them from reaching the engine. This not only prolongs the life of the engine but also improves its performance and fuel efficiency. Fuel filters for diesel come in different types, including spin-on filters, cartridge filters, and inline filters. They are easy to install and replace, making them an affordable and convenient maintenance solution for diesel engines.

At a Glance: Our Top Picks

Doc's Diesel Fuel/Water Separator Cover #TOP 1
Doc's Diesel Fuel/Water Separator
ftb score rating icon 9.9
Doc's Diesel 6.6L Duramax Fuel Filter Cover #TOP 2
Doc's Diesel 6.6L Duramax Fuel Filter
ftb score rating icon 9.8
Fuel Filters for Ram Truck 6.7L Cummins Diesel Cover #TOP 3
Fuel Filters for Ram Truck 6.7L Cummins Diesel
ftb score rating icon 9.6

Top 10 Fuel Filters for Diesel

#TOP 1

Doc's Diesel Fuel/Water Separator

DF-4625
Pack of 1
Doc's Diesel Fuel/Water Separator Cover
Doc's Diesel Fuel Filter DFD4625 | Compatible with Ford 6.7L Powerstroke F250, F350, F450 2017+ | Replaces FD4625

Doc's Diesel Filter is designed to offer top-notch performance for your 2017-2022 Ford F250/F350 with a 6.7L Powerstroke engine. This filter meets or exceeds the original equipment manufacturer's standards, ensuring high-quality filtration for your diesel fuel. Its durable three-layer media effectively captures contaminants, providing peace of mind while driving. Additionally, it easily replaces Motorcraft FD4625 and Wix WF10458 filters, simplifying your maintenance process. By choosing Doc's, you benefit from a reliable and efficient solution that enhances your vehicle's performance.

What We Like
Easy installation process
Great value for money
Good fit and compatibility
Durable and reliable performance
Comparable to OEM quality
What We Don't Like
Occasional gasket issue
#TOP 2

Doc's Diesel 6.6L Duramax Fuel Filter

DFD429
Doc's Diesel 6.6L Duramax Fuel Filter Cover
Doc's Diesel Fuel Filter DGF429 | Compatible with Chevrolet/GMC 6.6L Duramax 2500HD, 3500HD 2017-2019, Chevrolet/GMC 3.0L Duramax 2500HD, 3500HD 2020+ | Replaces TP1015

The Doc's Diesel Fuel Filter is designed to keep your engine running smoothly by removing harmful contaminants like dirt and debris. This premium filter enhances fuel flow and pressure, which can lead to improved acceleration and better fuel economy for your vehicle. Installation is straightforward and typically takes 30 to 60 minutes, making it convenient for you to maintain your vehicle’s performance. Additionally, changing the filter every 5,000 to 10,000 miles ensures that your fuel system remains in top condition, ultimately prolonging the lifespan of your engine.

What We Like
Fits 2021 GMC Sierra Elevation
High quality parts
Reasonable price
What We Don't Like
Possible sealing issue
May not fit all models
#TOP 3

Fuel Filters for Ram Truck 6.7L Cummins Diesel

68157291AA and 68436631AA
Fuel Filters for Ram Truck 6.7L Cummins Diesel Cover
Fuel Filters 68157291AA and 68436631AA for a 2019-2024 Ram Truck 6.7L Cummins Diesel

This Fuel Filter is a genuine Mopar part that is specifically designed to fit your 2019-2020 Ram Truck 6.7L Cummins Diesel. It comes with Part Number: 68157291AA and is manufactured to meet the specifications for fit, form, and function.

What We Like
OEM quality assurance
Easy installation process
Cost savings over dealership
Good fit and compatibility
Includes new seals
What We Don't Like
Occasional packaging issues
Rare defective product
#TOP 4

Mopar OEM Filter Set for Dodge Ram 6.7L

68197867AB, 68157291AA, 05083285AA
Shell
Mopar OEM Filter Set for Dodge Ram 6.7L Cover
Mopar Genuine OEM Filters Bundle, Dodge Ram 6.7L Cummins Diesel Filter set; Fuel/Water Separator Filter Kit, Fuel Filter & Engine Oil Filter. Fits 2013-2019 Ram 2500 and 3500

The Mopar Filter Set is specifically designed for your Dodge Ram 6.7L Cummins Diesel. Made in the United States, this OEM part ensures a perfect fit for your vehicle, unlike aftermarket options. You can trust its quality as it contains cellulose filter media, effectively removing contaminants from fuel and water. This means not only better performance but also enhanced engine longevity. Using genuine Mopar parts gives you peace of mind, knowing you are using components that meet the original specifications of your vehicle.

What We Like
OEM quality
Lower cost than dealership
Recommended by manufacturer
Reliable fit for most models
Better than aftermarket filters
What We Don't Like
Occasional fitment issues
Price slightly high
#TOP 5

Doc's 2019-23 DODGE RAM 6.7L CUMMINS DIESEL FILTER SET

DGF430+DGF401
Doc's 2019-23 DODGE RAM 6.7L CUMMINS DIESEL FILTER SET Cover
Doc's Diesel Fuel/Water Separator DGF430+DGF401 | Compatible with RAM 6.7L Cummins 2500, 3500, 4500, 5500 2019-2024 | Replaces 68157291AA, 68436631AA

The Doc's 2019-23 DODGE RAM 6.7L CUMMINS DIESEL FILTER SET is an efficient and reliable replacement for OEM 68436631AA 68157291AA fuel filters. The filter set is made with high-efficiency 3 layer media paper that ensures a 99.5% efficiency with a 3 Micron Rating. It meets and exceeds Dodge's warranty requirements, making it a reliable option for your vehicle.

What We Like
Perfect OEM fit
High quality material
Cost savings
Fast shipping
No performance issues
What We Don't Like
Packaging could improve
Occasional damaged seal
#TOP 6

AirDog WS100 & FF100-2 Fuel & Water Filter Combo

FF100-2 & WS100
AirDog WS100 & FF100-2 Fuel & Water Filter Combo Cover
AirDog Pre-Filter WS100 and Fuel Filter FF100-2 Combo Pack

The AirDog Fuel & Water Filter combo is designed specifically for diesel engines, offering you reliable fuel purification. This set includes a water separator and a fuel filter, which work together to protect your engine by removing water and contaminants from your fuel. It’s important to note that this package contains only the replacement filters, so it’s perfect for those who already have an AirDog fuel system and just need to replace worn parts. By using this combo, you help ensure your engine runs smoothly and efficiently, preventing damage and improving performance.

What We Like
OEM quality and fit
Effective filtration performance
Easy to install
Reliable sealing, no leaks
Good packaging for most units
What We Don't Like
Occasional dents or scratches
Inconsistent packaging protection
#TOP 7

6.7L Cummins Fuel Filter Water Separator

KP9131FT19-20
6.7L Cummins Fuel Filter Water Separator Cover
6.7 Cummins Fuel Filter Water Separator Set Fits for 2019 2020 2021 2022 2023 2024 Dodge Ram 2500 3500 4500 5500 6.7L Diesel Turbo Engines, Replaces# 68157291AA and 68436631AA

Protect your engine from harmful particles with this Fuel Filter Water Separator Set, designed as a replacement for 2019-2022 Ram 2500, 3500, 4500, 5500 6.7L Turbo Diesel Engines. Made of high-quality and durable material, this set meets or exceeds OEM quality standards. Plus, it comes with a 6-month warranty for worry-free buying.

What We Like
OEM-like fit and performance
Significantly lower price
Includes required gaskets
Long-lasting durability
Fast delivery and good packaging
What We Don't Like
Occasional minor o-ring leak
#TOP 8

Mopar OEM Filters Bundle for 2020-2024 Ram 6.7L Cummins

68436631AA, 68157291AA, 05083285AA
Mopar OEM Filters Bundle for 2020-2024 Ram 6.7L Cummins Cover
Mopar Genuine OEM Filters Bundle, Dodge Ram 6.7L Cummins Diesel Filter set; Fuel/Water Separator Filter Kit, Fuel Filter & Engine Oil Filter. Fits 2020-2024 Ram 2500 and 3500

The Mopar Ram Diesel Filters are designed specifically for Ram trucks from 2020 to 2024, including models 2500, 3500, 4500, and 5500. This set includes essential filters like the fuel filter, water separator, and engine oil filter, helping you maintain your truck’s engine performance and reliability. These filters ensure clean fuel and oil flow, which protects your engine from contaminants and extends its life. Keep in mind, this kit does not fit Ram models from 2013 to some 2019 years, so it’s important to check your truck’s year before purchasing. With this set, you get a convenient, all-in-one solution for your diesel engine’s filtration needs.

What We Like
Genuine Mopar OEM quality
Fast, reliable delivery
Secure, well-packaged shipment
Good value bundle pricing
Easy installation process
#TOP 9

Doc's Diesel Fuel Filter DCS8629OE for Ford 7.3L Super Duty

DCS8629OE
Doc's Diesel Fuel Filter DCS8629OE for Ford 7.3L Super Duty Cover
Doc's Diesel Fuel Filter DCS8629OE | Compatible with Ford 7.3L Super Duty F250, F350, F450, F550 1999-2003 | Replaces FD4596

The Doc's Diesel Fuel Filter is designed to keep your Ford 7.3L Super Duty running smoothly by removing harmful contaminants like water, dirt, rust, and debris from your fuel. This helps protect vital fuel system parts and ensures your engine performs at its best. It also improves fuel flow and pressure, which can boost your truck’s acceleration and fuel efficiency. The filter maximizes the filtration surface area for better cleaning and comes with all necessary o-rings for easy installation. Tested for high efficiency, this filter provides reliable protection for your vehicle’s fuel system.

What We Like
OEM-like perfect fit
Excellent build quality
Easy installation process
Great value for price
Reliable engine protection
What We Don't Like
Occasional missing cap
Tight fit for some models

EVIL ENERGY Inline Fuel Filter 10 Micron with 6AN 8AN 10AN Adapter&Bracket Clamp 50MM Universal

EV07153BK
Black
10 Micron
EVIL ENERGY Inline Fuel Filter 10 Micron with 6AN 8AN 10AN Adapter&Bracket Clamp 50MM Universal Cover
EVIL ENERGY Inline Fuel Filter 10 Micron with 6AN 8AN 10AN Adapter&Bracket Clamp 50MM Universal

EVIL ENERGY Fuel Filter is a universal filter with adapters for various applications. The aluminum alloy can and stainless steel filter element ensure durability. The tight seal o-ring prevents leaks. This fuel filter can be used for gasoline, diesel, E85, etc., capturing particles of 10 microns and above to protect your vehicle's fuel system. The removable design allows for easy cleaning or filter replacement, keeping your engine running smoothly.

What We Like
Durable aluminum housing
Multiple hose fittings
Easy installation and cleaning
Effective debris filtration
High-performance compatibility
What We Don't Like
Possible leakage without extra o-ring
May contain minor manufacturing debris
Buying Guide Image

Factors to Consider when Choosing Fuel Filters for Diesel

Filtration Efficiency

Look for fuel filters that have a high filtration efficiency to ensure that they effectively remove contaminants from diesel fuel. Filters with a micron rating of 2 or lower are considered highly efficient in trapping even the smallest particles that can cause damage to the fuel system.

Water Separation

Diesel fuel can often contain water, which can cause corrosion and damage to the engine. Opt for fuel filters that have effective water separation capabilities. Look for filters with features like water drain valves or water sensors that can help remove water from the fuel and prevent it from entering the engine.

Compatibility

Ensure that the fuel filter you choose is compatible with your diesel engine. Different engines may have specific requirements for fuel flow rate, size, or filter type. Refer to your engine's manufacturer guidelines or consult with a professional to select a filter that meets the necessary specifications.

Durability

Consider the durability and longevity of the fuel filter. Look for filters made from high-quality materials that can withstand the harsh conditions and contaminants commonly found in diesel fuel. A durable filter will provide long-lasting performance and protection for your engine.

Maintenance

Check if the fuel filter requires regular maintenance or replacement. Some filters may need frequent changes, while others offer longer service intervals. Consider your preferences and the convenience factor when selecting a fuel filter that suits your needs.

Frequently Asked Questions (FAQs)

1. How often do diesels need fuel filters?

Diesels typically require a fuel filter change every 10,000 to 15,000 miles. In comparison, modern gasoline fuel filters can last over 100,000 miles before needing a change. Most diesel truck applications will have two fuel filters that need to be serviced.

2. What are the symptoms of a dirty diesel fuel filter?

A dirty diesel fuel filter can cause various symptoms, although they may not be specific. These can include engine stuttering, jerking or stalling during acceleration, and even complete engine shutdown. These issues are often more noticeable at high engine speeds and, in severe cases, can prevent the vehicle from starting.

3. What are the two types of diesel fuel filters?

There are two types of diesel fuel filters commonly found in most diesel engines. The primary filter is located between the fuel tank and the engine, cleaning the fuel before it reaches the fuel transfer pump. The secondary filter, located near the engine, provides a final cleaning of the fuel before it reaches the fuel injectors.

4. What happens if you don't change a diesel fuel filter?

Failing to change a diesel fuel filter on time can result in clogging. When the differential pressure on the filter becomes too high, the filter media can bend or break, allowing unfiltered particles to enter the engine or cabin. This can lead to engine performance issues and potential damage.

5. Does a K&N filter make a difference on a diesel?

Using a K&N diesel air filter or diesel air intake system can improve diesel performance by increasing horsepower and torque output. These filters reduce restrictions in the air intake system, allowing for improved airflow and enhanced engine performance.

6. How do I know which fuel filter to buy?

When purchasing a fuel filter, consider the following factors: the location of the filter on the vehicle, the presence of a sensor or electrical connector for a sensor, and the number of connectors the sensor has. Additionally, the vehicle's manufacturing date (not the registration date) is important to ensure compatibility with the specific model.

Editor's Notes

During our fuel filter for diesel research, we found 24 fuel filter for diesel products and shortlisted 10 quality products. We collected and analyzed 23,470 customer reviews through our big data system to write the fuel filters for diesel list. We found that most customers choose fuel filters for diesel with an average price of $44.33.

The fuel filters for diesel are available for purchase. We have researched hundreds of brands and picked the top brands of fuel filters for diesel, including Doc's Diesel, Mopar, Airdog, KOROP, EVIL ENERGY. The seller of top 1 product has received honest feedback from 442 consumers with an average rating of 4.8.

Written by
Robert Reyes Avatar

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.

Fuel Filters for Diesel Comparison Table

#TOP1
#TOP2
#TOP3
#TOP4
#TOP5
#TOP6
#TOP7
#TOP8
#TOP9
#TOP10
Brand Doc's Diesel Doc's Diesel Mopar Mopar Doc's Diesel Airdog KOROP Mopar Doc's Diesel EVIL ENERGY
Product Grade Replacement Part Replacement Part Replacement Part New Replacement Part Replacement Part Replacement Part New Replacement Part Tuning
Outer Material Metal Carbon Steel Carbon Steel Plastic Metal Plastic Metal Plastic Carbon Steel Aluminum, Stainless Steel
Vehicle Service Type Truck Truck Truck Truck Truck Passenger Car, SUV, Truck, Van Truck Truck Truck Passenger Car, Truck, ATV, Lawn Mower, Snowmobile, Bus, UTV, Motorcycle, Scooter, Van, Watercraft, Go-Kart, Light Truck, SUV, Golf Cart, Moped, RV
Item Weight - 0.38 Kilograms - 3.96 Pounds 0.48 Kilograms 1.8 Pounds 0.65 Kilograms - 0.34 Kilograms -
FTB Score
ftb score rating icon 9.9
ftb score rating icon 9.8
ftb score rating icon 9.6
ftb score rating icon 9.5
ftb score rating icon 9.3
ftb score rating icon 9.1
ftb score rating icon 8.9
ftb score rating icon 8.9
ftb score rating icon 8.9
ftb score rating icon 8.8
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