The Ram Cummins 6.7 requires a synthetic diesel oil change every 15,000 miles or 12 months. This extended interval applies to standard highway towing and local hauling throughout the Tuscaloosa region. Protect your heavy-duty powertrain and schedule your certified Ram maintenance today.
The available High-Output 6.7-liter Cummins Turbo Diesel Inline-6 is a commercial-grade engine that demands specialized fluid management. Because this engine generates up to 1,075 lb-ft of torque to achieve a maximum towing capacity of 36,610 pounds when properly equipped, it operates under immense thermal stress. Utilizing the correct factory-grade synthetic diesel oil ensures that the turbocharger remains properly lubricated while preventing oil breakdown during heavy hauling up steep grades.
If you are a commercial contractor utilizing your truck in highly dusty environments or spending countless hours idling on Northport job sites, you must follow the severe duty schedule. This requires shortening your oil change and fuel filter intervals to prevent particulate buildup. For a complete understanding of how this engine dictates your hauling capabilities, read our 2026 Ram 3500 heavy-duty overview.
Maintaining a diesel truck involves strict adherence to fuel filter replacements. The Cummins engine utilizes both an engine-mounted fuel filter and a rear chassis-mounted water separator. Replacing these filters on schedule prevents water and debris from damaging your highly sensitive fuel injectors.
As your commercial truck tackles years of punishing job sites and approaches the 100,000-mile mark, replacing worn heavy-duty components can become an expensive operational cost. When major chassis or transmission services arise, you can seamlessly evaluate your Ram trade-in value to determine if upgrading your fleet is a more profitable business decision.
| Mileage Interval | Required Heavy-Duty Maintenance |
|---|---|
| 15,000 Miles | Synthetic diesel oil and filter change, rotate dual rear wheels (if applicable). |
| 30,000 Miles | Replace engine-mounted fuel filter, replace chassis-mounted water separator. |
| 60,000 Miles | Replace AISIN 6-speed automatic transmission fluid and filter. |
| 100,000 Miles | Flush heavy-duty engine coolant, inspect diesel particulate filter (DPF). |
| 150,000 Miles | Inspect accessory drive belts, extensive powertrain and suspension diagnostic. |
To keep your fleet running without interruption, it is vital to stay current with any Stellantis software patches or active safety campaigns. You can check your specific vehicle identification number through the National Highway Traffic Safety Administration recall database to ensure all systems are fully compliant. You can also review recommended service protocols directly on the official Ram owner portal.
If your 12-inch digital cluster displays a water-in-fuel warning light, do not ignore it. Contact our specialized service advisors immediately to drain the separator and protect your engine.
* The advertised price does not include sales tax, vehicle registration fees, other fees required by law, finance charges and any documentation charges. All vehicles that are registered in another state other than Alabama will be accessed a $275 fee to properly handle that state's DMV paperwork.
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