6.7L Cummins, 2019–2024 Dodge RAM 2500–5500 models,68157291AA, Mopar

How Much Oil Does the 6.7L Cummins Hold & Maintenance Best Practices

1. Oil Capacity for the 6.7L Cummins

The oil capacity of a 2019–2024 6.7L Cummins engine, including the oil filter, is:

✅ 12 Quarts (11.4 Liters)

This applies to both standard output and high-output versions of the engine. Always measure with the dipstick after an oil change because slight variations can occur based on oil filter type and draining method.

Why it matters: Too little oil causes excessive wear, while too much oil can lead to foaming, loss of lubrication, and even engine damage.

2. Recommended Oil Type

Using the right oil ensures your Cummins engine gets proper lubrication, cooling, and cleaning.

OEM Recommendation:

  • API CK-4 Rated Diesel Engine Oil

Viscosity Options:

  • 5W-40 Full Synthetic – Best for extreme temperatures and heavy towing.

  • 15W-40 – Best for mild climates and standard driving conditions.

Popular Brands:

  • Mopar OEM Diesel Engine Oil

  • Shell Rotella T6 Full Synthetic

  • Valvoline Premium Blue Extreme Diesel Oil

3. Oil Change Intervals

Changing oil on time is the single most important thing you can do for your Cummins.

Normal Service: Every 15,000 miles or 12 months
Severe Service: Every 7,500 miles or 6 months

Severe service conditions include:

  • Frequent towing of heavy loads

  • Excessive idling

  • Driving in dusty or dirty environments

  • Operating in extreme hot or cold weather

4. Step-by-Step Oil Change Guide

Changing the oil yourself can save money and help you understand your truck better.

What You Need:

  • 12 quarts of recommended diesel oil

  • Mopar OEM oil filter (Part #68157291AA or equivalent)

  • Oil drain pan

  • 3/8" or 1/2" ratchet and socket

  • Oil filter wrench

  • Funnel and shop towels

Procedure:

  1. Warm the engine for 3–5 minutes.

  2. Park on level ground and engage the parking brake.

  3. Position oil pan under the drain plug.

  4. Remove the drain plug and drain all oil.

  5. Remove the oil filter with a filter wrench.

  6. Lubricate new filter’s O-ring with fresh oil.

  7. Install the new filter hand-tight, then add 3/4 turn.

  8. Reinstall the drain plug and torque to manufacturer specs.

  9. Pour 12 quarts of fresh oil using a funnel.

  10. Start the engine and check for leaks.

  11. Check oil level and top up if necessary.

5. Signs It’s Time to Change Oil Early

Even if you haven’t reached the mileage or time limit, change your oil if you notice:

  • Black, gritty oil on the dipstick

  • Low oil pressure warning

  • Increased engine noise

  • Fuel smell in oil

  • Overheating

6. Best Practices for Maintaining Your Cummins Engine

  • Always use OEM-quality filters for proper protection.

  • Check oil monthly to ensure correct level.

  • Change fuel and oil filters at the same time for convenience.

  • Keep a maintenance log for warranty and resale value.

  • Avoid overfilling — it’s just as harmful as low oil.

7. Cost of an Oil Change

  • DIY: $70–$120 (oil + filter)

  • Dealership: $150–$250

  • Independent shop: $120–$180

Doing it yourself can save money in the long run — especially if you drive in severe conditions and need more frequent changes.

Conclusion

The 2019–2024 6.7L Cummins holds 12 quarts (11.4 liters) of oil with the filter. Sticking to the recommended oil type, capacity, and maintenance intervals will protect your engine, improve fuel economy, and keep your truck running at peak performance.

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