The 2017 Ram 2500 and Ram 3500 equipped with the 6.7L Cummins Turbo Diesel engine are known for exceptional towing power, durability, and long-term reliability. Whether used for heavy-duty hauling, commercial work, towing trailers, or daily driving, proper oil maintenance is critical for protecting this high-performance diesel engine.
Using the correct engine oil helps reduce wear, protect turbocharger components, improve fuel efficiency, minimize soot buildup, and extend overall engine life. Because the 6.7 Cummins operates under high heat and heavy loads, choosing high-quality diesel engine oil is especially important.
What Oil Does a 2017 6.7 Cummins Use?
The recommended oil type for the 2017 6.7 Cummins is typically SAE 15W-40 diesel engine oil that meets API CJ-4 or CK-4 specifications. This viscosity provides excellent lubrication and engine protection under heavy-duty operating conditions.
For colder climates and winter operation, many owners use SAE 5W-40 full synthetic diesel oil because it improves cold-weather starting and maintains excellent protection at low temperatures.
High-quality synthetic diesel oil is highly recommended for towing, commercial use, and long highway driving because it offers superior resistance to heat, oxidation, and soot buildup.
Best Overall Choice: SAE 5W-40 full synthetic diesel oil provides excellent cold-start performance, turbocharger protection, and high-temperature durability for the 2017 6.7 Cummins engine.
2017 6.7 Cummins Oil Capacity
The 6.7L Cummins diesel engine requires a large oil capacity to properly lubricate and cool internal engine components during heavy operation.
Important: Always verify oil level after refilling and replacing the oil filter because improper oil levels can affect turbocharger performance and engine protection.
Best Oil for 2017 6.7 Cummins
Premium synthetic diesel oil helps reduce engine wear, improve turbocharger durability, and maintain cleaner engine internals during heavy towing and hauling.
Recommended Diesel Oil Brands
- Shell Rotella T6 5W-40
- Valvoline Premium Blue
- Mobil Delvac 1300 Super
- Castrol GTX Diesel
- Chevron Delo 400
- Amsoil Heavy-Duty Diesel Oil
Benefits of Synthetic Diesel Oil
- Improved turbocharger protection
- Better cold-weather starting
- Reduced soot buildup
- Better high-temperature stability
- Longer oil life
- Reduced engine wear
2017 6.7 Cummins Oil Change Interval
Oil change intervals may vary depending on towing conditions, driving style, and oil type used.
Maintenance Tip: Heavy towing and long idle times increase soot contamination in diesel oil, making regular oil changes extremely important.
2017 6.7 Cummins Oil Change Cost
Oil changes for diesel trucks cost more than gasoline engines because of the larger oil capacity and specialized diesel oil requirements.
How to Change Oil in a 2017 6.7 Cummins
Common 6.7 Cummins Engine Problems
Turbocharger Wear
Dirty oil or delayed oil changes may accelerate turbocharger wear and reduce performance.
Excessive Soot Buildup
Heavy towing and short trips can increase soot contamination inside the oil system.
Oil Consumption
High-mileage diesel engines may develop increased oil consumption over time.
Cold Start Issues
Incorrect oil viscosity or weak glow plugs can affect winter starting performance.
Signs Your 6.7 Cummins Needs an Oil Change
- Dark or excessively dirty oil
- Engine knocking or ticking
- Reduced fuel economy
- Increased exhaust smoke
- Oil pressure warning light
- Rough engine operation
- Excessive idling hours
- Frequent heavy towing
Maintenance Tips for Longer Engine Life
- Use high-quality diesel oil
- Replace oil filters regularly
- Allow turbocharger cool-down after towing
- Check oil level frequently
- Use quality diesel fuel
- Replace fuel filters on schedule
- Avoid excessive engine idling
- Monitor coolant and transmission temperatures
Frequently Asked Questions
What oil does a 2017 6.7 Cummins use?
The 2017 6.7 Cummins typically uses SAE 15W-40 diesel engine oil meeting API CK-4 or CJ-4 specifications.
How much oil does a 2017 6.7 Cummins hold?
The 6.7L Cummins diesel engine holds approximately 12 quarts of engine oil with a filter change.
Can I use 5W-40 synthetic oil in a 6.7 Cummins?
Yes. SAE 5W-40 full synthetic diesel oil is highly recommended, especially in colder climates and heavy towing conditions.
How often should oil be changed in a 6.7 Cummins?
Oil should generally be changed every 7,500 to 15,000 miles depending on towing, driving conditions, and oil type used.
What is the best oil for towing with a 6.7 Cummins?
Full synthetic 5W-40 diesel oil provides excellent protection for heavy towing and high-temperature operation.
Final Thoughts
The 2017 6.7 Cummins diesel engine is built for durability and heavy-duty performance, but regular oil maintenance is critical for maximizing reliability and engine lifespan.
For the best overall protection, most owners should use SAE 5W-40 full synthetic diesel engine oil along with high-quality oil filters and scheduled maintenance intervals.
Quick Summary
- Recommended Oil: SAE 15W-40 or 5W-40
- Oil Capacity: Approximately 12 Quarts
- Preferred Oil: Full Synthetic Diesel Oil
- Oil Change Interval: 7,500–15,000 Miles
- Oil Specification: API CK-4/CJ-4
- Best Maintenance Tip: Change oil more frequently when towing