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What kind of oil does a 2013 6.7 Cummins take?

The 2013 Ram heavy‑duty trucks with the 6.7-liter Cummins turbodiesel use a full‑synthetic diesel engine oil with a viscosity of 5W‑40, and it must meet API CJ‑4 (CK‑4 is acceptable) and Cummins CES specifications (current or newer, such as CES 20081).

In practice, this means you should select a high-quality, full‑synthetic diesel engine oil that is specifically formulated for late‑model Cummins diesels. The oil not only lubricates the moving parts but also protects the exhaust aftertreatment system and keeps critical clearances stable under heavy use, such as towing or hauling. Always verify the exact spec on your vehicle’s manual or with the manufacturer if you’re unsure about a particular oil label.

Oil specifications for the 2013 6.7 Cummins

The engine requires a diesel oil that provides robust protection under high combustion temperatures and active aftertreatment systems. The key is to choose a 5W‑40 full‑synthetic oil that carries the correct API service category and Cummins certification.

Core requirements

Viscosity: 5W-40

Oil type: Full synthetic diesel engine oil

API service category: CJ-4 (CK-4 is also acceptable for many engines)

Cummins specification: Meets Cummins CES 20081 or newer

These criteria ensure proper lubrication during both normal operation and demanding driving conditions, and they help maintain the performance of the engine and its emissions systems. If you cannot find CES 20081 specifically listed, oils that meet CJ-4/CK-4 and API diesel service standards are generally compatible; always confirm with the latest owner’s manual.

Recommended oil brands and products

Several reputable brands offer 5W‑40, full‑synthetic diesel oils that meet CJ‑4/CK‑4 and Cummins CES specs. The following options are commonly used by owners and service centers for the 6.7L Cummins:

Mobil Delvac 1 ESP 5W-40

Shell Rotella T6 5W-40

Amsoil Signature Series 5W-40 Diesel

Valvoline Premium Blue Extreme 5W-40 Diesel

When shopping, always read the label to confirm it lists API CJ-4 or CK-4 and Cummins CES certification. Regional product labeling can vary, so verify before purchasing.

Maintenance and interval notes

Oil-change intervals depend on driving conditions, loads, and duty cycle. Follow the vehicle’s manual or the built‑in oil life monitor for the recommended service intervals. In severe service—such as frequent towing, extreme temperatures, or many short trips—adhere to the shorter end of the recommended range and use the specified 5W‑40 formulation to protect the engine and aftertreatment system.

Summary

For a 2013 6.7 Cummins, choose a full‑synthetic diesel oil with 5W‑40 viscosity that meets API CJ‑4 (CK‑4 acceptable) and Cummins CES specifications (CES 20081 or newer). Commonly used options include Mobil Delvac 1 ESP 5W‑40, Shell Rotella T6 5W‑40, Amsoil Signature Series 5W‑40, and Valvoline Premium Blue Extreme 5W‑40. Always verify labeling to ensure the exact specifications are met and follow the owner’s manual for oil-change intervals.

What oil should I run in my 6.7 Cummins?

For a 6.7L Cummins, use either 15W-40 (common for older models or warm climates) or 5W-40 (synthetic recommended for cold starts). For 2019 and newer models, 10W-30 or 5W-40 are often recommended, with synthetic versions providing superior protection. Always use a low-ash oil that meets API CJ-4 or CK-4 and Cummins CES 20081 standards, and check your owner's manual for the precise specifications for your year and climate.
Oil viscosity and type

2019 and newer: 10W-30 or 5W-40.
2007–2018: 15W-40 or 5W-40.
General use: 15W-40 is a common year-round option, especially for warmer climates or heavy towing.
Synthetic vs. conventional: Synthetic oils generally offer better protection, especially in extreme temperatures, and can extend oil change intervals.

Key specifications

API Service Category: Look for oils meeting CJ-4 or CK-4 standards.
Cummins Specification: The oil should meet the Cummins CES 20081 standard.

Recommended brands

AMSOIL OE Synthetic 5W-40
Shell Rotella T6 5W-40 Full Synthetic
Valvoline Premium Blue Extreme 5W-40
Mobil 1 Turbo Diesel Truck 5W-40

Important considerations

Check your owner's manual: Always confirm the specific requirements for your truck's model year.
Change intervals: Adhere to the recommended service intervals to maintain engine health.
Towing: If you frequently tow heavy loads, a 15W-40 or 5W-40 is often recommended to handle the extra stress.

Can I put 15w40 in my 6.7 Cummins?

You can put 15W-40 in a 6.7 Cummins, but only for pre-2019 models, as it is not recommended for newer models. Newer 2019 and later 6.7 Cummins engines require a thinner oil, such as 10W-30 or 5W-40, because the thicker 15W-40 can cause deposits on hydraulic lifters and lead to slow pressurization. Always use a low-ash diesel oil that meets API CJ/CK-4 and Cummins CES 20081 standards.
For 6.7 Cummins engines

2007–2018 models: Use 15W-40 or 5W-40, depending on your climate.
2019+ models: Use 10W-30 or 5W-40. 15W-40 is not recommended and can cause issues.

Before you use 15W-40

Check your owner's manual: This is the most definitive source for your specific truck.
Consider the climate: If you operate in consistently cold temperatures, a thinner oil like 5W-40 is a better choice even for older models.
Use the correct specifications: Regardless of the viscosity, ensure the oil is a low-ash diesel oil that meets API CJ/CK-4 and Cummins CES 20081 standards.

How many quarts of oil does a 2013 6.7 take?

A 2013 6.7L engine typically has an oil capacity of 13 quarts (12.3 liters) when changing the oil and filter. Some sources specify a slightly higher capacity of 13.1 quarts. It is always best to start with around 13 quarts and then check the dipstick to add more if needed, as recommended in the owner's manual.

Capacity: 13 quarts or 12.3 liters (with filter)
Starting point: Begin with approximately 13 quarts and adjust as needed after checking the dipstick.
Verification: Consult your owner's manual for the exact capacity and oil type for your specific vehicle.

What kind of oil does a 2013 Ram 2500 6.7 Cummins take?

Rotella T6 5W-40: A proven synthetic oil that provides excellent cold start protection and outstanding engine cleanliness, reducing deposits and wear over time.

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.