Magnetic Diesel Fuel Cap + DEF Cap Combo Pack for Dodge RAM 2013-2018

In this review of the Magnetic Diesel Fuel Cap + DEF Cap Combo Pack the bottom line is simple: this is for Dodge Ram owners who want a durable, tidy solution to keep contaminants out of a capless fuel fill while adding an OEM-looking accessory. The combo includes both a green diesel fuel cap with a strong rare earth magnet and a blue DEF cap machined from aircraft grade aluminum, so the biggest reason to buy is reliable tank protection plus a secure place to park the cap during fill-ups. It is a compact, well-built pair that feels like a factory upgrade and saves money versus buying each cap separately.

Key Features

• Combo value: Includes one diesel fuel cap and one DEF cap so buyers save compared to purchasing each item separately and get matched styling.
• Magnetic mount: A strong rare earth magnet on the diesel cap holds it to any metal surface on the truck during refueling so it stays out of the way and does not roll off.
• Sealing O-rings: Diesel-compatible rubber O-rings provide a snug seal to keep dirt and water out of the fuel fill area for cleaner fuel delivery.
• Aircraft grade build: Both caps are machined from aircraft grade aluminum and anodized green and blue for corrosion resistance and clear visual differentiation of fluids.
• Smooth DEF handle: The DEF cap features a smooth, easy-to-grip handle that slides and locks into place for comfortable use and to reduce the chance of cross-contamination.
• Capless system compatibility: Designed specifically for capless Dodge Ram diesel fuel fills from 2013 onward (may not fit 2019 models), making it a targeted replacement accessory.

Who It's For

The combo is ideal for owners of Dodge Ram trucks with the capless fuel system (model years 2013 through 2018) who want a simple, durable way to prevent dirt and water from entering the tank and a convenient magnetic place to park the cap during refueling. It appeals to drivers who prefer machined metal accessories that look OEM and who appreciate clear color coding between diesel and DEF.

It is less suitable for owners of Ram trucks outside the specified years (notably possible incompatibility with some 2019 models) or for those who prefer a keyed lock-style cap rather than a magnetic/unthreaded replacement. If you need model-specific locking security, consider a locking fuel cap solution instead.

Pros & Cons

Pros

• Well-machined aluminum construction gives a premium, OEM-like appearance and durable finish.
• Strong magnet holds the diesel cap securely to metal surfaces during fill-ups, preventing loss or contamination risks.
• Diesel-compatible O-rings and tight sealing reduce the chance of dirt and water entering the fuel tank.
• Combo saves money and provides matched styling for both diesel and DEF ports.

Cons

• Fitment is specific to capless Dodge Ram diesels 2013+ and may not fit some 2019 models, so buyers must confirm compatibility.
• Not a keyed locking cap, so it provides protection from contaminants rather than theft deterrence.

Specifications

Included items	1 diesel fuel cap (Easy Grip) and 1 DEF cap
Compatibility	Capless Dodge Ram diesel trucks 2013+ (may not fit 2019)
Material	Machined aircraft grade aluminum
Finish	Anodized green (diesel) and blue (DEF) with laser logo
Seal	Diesel-compatible rubber O-rings (green cap includes two O-ring sizes)
Mounting feature	Strong rare earth magnet on diesel cap
DEF handle	Smooth, easy to grip and locks into place

Our Verdict

For Ram owners with a capless diesel fuel system, this combo pack is a practical, attractive upgrade that protects the tank from dirt and water while offering a convenient magnetic parking spot for the cap. The aircraft grade construction and matched anodized colors make it a durable, value-minded choice for drivers who want function and a factory look without buying separate parts.

Frequently Asked Questions

Will this fit my Ram truck?
This set is designed for capless Dodge Ram diesel trucks from 2013 onward; check fit for 2019 models as compatibility may vary.

Does the diesel cap stay in place while driving?
The strong rare earth magnet is intended to hold the diesel cap to metal surfaces like the fuel door hinge during fill-ups and customers report secure retention.

Are replacement O-rings included?
The green diesel cap ships with two sizes of diesel-compatible O-rings so you can choose the best seal for your truck.