2027 Ram 2500 Maintenance Schedule, Service Costs & Ownership Guide
The 2027 Ram 2500 factory maintenance schedule has not yet been published for the Cummins diesel or HEMI V8. Ram's official owner's manual is the authoritative source until the schedule is indexed. This guide covers what owners can expect now, with inventory at Johnsons of Kingfisher.
Maintenance Schedule
Ram has not yet released the official 2027 Ram 2500 factory maintenance schedule. No owner's manual or Ram-published service interval document has been indexed as of this writing.
What we can confirm from the verified 2027 Ram 2500 specification sheets:
6.4L HEMI V8
- Oil capacity: 7.0 quarts (6.6 liters)
- Coolant capacity: 16.6 quarts (15.75 liters)
- Fuel requirement: Unleaded regular, 87 octane
6.7L Cummins HO Turbo Diesel I-6
- Oil capacity: 12.0 quarts (11.3 liters) with filter
- Coolant capacity: 23.8 quarts (22.50 liters)
- Fuel requirement: Ultra-low sulfur diesel
- Emission controls: Selective catalytic reduction (SCR), requiring Diesel Exhaust Fluid (DEF)
For specific oil change intervals, transmission service intervals, brake fluid intervals, spark plug replacement schedules, DEF fill intervals, and any other service milestones, consult your 2027 Ram 2500 owner's manual directly or speak with the service team at Johnsons of Kingfisher. Applying intervals from a prior model year is not recommended, as powertrain updates can change factory-specified service points.
Service Costs & What to Expect
Because the official service schedule is pending, specific service cost projections tied to mileage intervals are not available here. However, owners can plan around several known service categories based on the 2027 Ram 2500's confirmed powertrains and equipment.
Diesel Exhaust Fluid (DEF), Cummins diesel models
The 6.7L Cummins HO Turbo Diesel uses selective catalytic reduction (SCR) for emissions control. DEF is a consumable fluid that requires periodic refilling. The Power Wagon diesel features underbody skid plate protection for the DEF tank. DEF fill intervals depend on driving conditions and load; your owner's manual or the dealership service team can give you a current fill-interval estimate based on your specific use pattern.
Oil and Filter Service
The 6.4L HEMI V8 carries 7.0 quarts and the 6.7L Cummins carries 12.0 quarts with filter. Heavy-duty diesel engines have larger oil capacities than comparable gas engines, which can affect per-service material costs. Owners who tow near the 20,000-lb maximum or operate in dusty Oklahoma conditions may require more frequent service than owners who use the truck primarily for lighter duty.
Brake Service
The 2027 Ram 2500 uses 14.2-inch front disc brakes and 14.1-inch rear disc brakes. Brake wear rate varies significantly by towing frequency and load. Diesel-equipped models use hydro-boost power assist; gas models use a dual-rate tandem diaphragm vacuum system. Brake inspection intervals should follow the owner's manual recommendation.
Transmission and Transfer Case
Both the TorqueFlite HD 8HP75 (HEMI V8) and the TorqueFlite HD 8AP1075 (Cummins diesel) are eight-speed automatics. Transfer case service for the BW 44-46/47 and BW 44-48 units should follow Ram-published intervals in the owner's manual.
Electrical System Maintenance
HEMI V8 models use a single Group 65 battery (730 CCA). Cummins diesel models use dual Group 65 batteries (730 CCA each). Dual-battery systems on diesel trucks require both batteries to be inspected and, when needed, replaced together to maintain proper charging balance.
For a precise service estimate on any of the items above, the service advisors at Johnsons of Kingfisher can pull current Ram service bulletins and provide a written estimate.
Warranty & Coverage
Ram provides separate warranty coverage depending on powertrain choice. The following applies to 2027 Ram 2500 trucks; consult Ram's official warranty documentation for complete terms, as the details below reflect the coverage categories advertised for this model.
| Powertrain | Coverage | What to Confirm |
|---|---|---|
| Gas Powertrain (6.4L HEMI V8) | Ram advertises a Gas Powertrain Limited Warranty and Gas Roadside Assistance for HEMI-equipped models. | Specific term lengths and mileage limits should be confirmed with Johnsons of Kingfisher or via Ram's official warranty guide, as no specific year/mileage figures have been published in the verified 2027 documentation provided for this page. |
| Diesel Powertrain (6.7L Cummins HO Turbo Diesel) | Ram advertises a Diesel Powertrain Limited Warranty and Diesel Roadside Assistance for Cummins-equipped models. | As with the gas warranty, specific term lengths and mileage limits should be confirmed directly with the dealership or Ram's official warranty documentation. |
Roadside assistance is a meaningful benefit for owners who use the Ram 2500 in remote or off-road situations. The Power Wagon diesel, with its estimated 600-mile range on a 31-gallon tank, is purpose-built for extended overlanding and backcountry work where roadside assistance coverage carries real value.
Ram 2027 warranty documentation
Common Ownership Questions
How reliable is the 6.7L Cummins HO Turbo Diesel?
The Cummins inline-six has a long track record in Ram heavy-duty trucks dating back decades, and the 6.7L HO variant is the most powerful version offered. The 2027 Power Wagon diesel produces 430 hp and 1,075 lb-ft of torque at 1,800 rpm. Owners who maintain the diesel properly, including timely DEF refills, oil changes, and coolant maintenance, typically report long service life from the Cummins platform.
What makes the Power Wagon diesel different to own versus the HEMI V8?
The Cummins diesel requires DEF in addition to ultra-low sulfur diesel fuel, adds dual batteries, and uses a hydro-boost brake system instead of vacuum assist. Oil capacity is 12.0 quarts versus 7.0 quarts for the HEMI V8. The diesel also weighs more due to its compacted graphite iron (CGI) block and cast-iron head, which affects fuel economy and suspension wear patterns compared to the gas truck.
How does towing affect service intervals?
Sustained heavy towing, particularly near the 20,000-lb maximum diesel towing rating, accelerates wear on brakes, transmission fluid, engine oil, and cooling systems. Ram's owner's manual will specify a severe-duty service schedule for trucks that tow frequently or operate in extreme temperatures. Oklahoma summers and the dusty conditions common across Kingfisher County qualify as conditions worth discussing with your service advisor.
Does the Power Wagon's off-road suspension require special maintenance?
The Power Wagon uses Bilstein monotube shocks front and rear, a class-exclusive electronic disconnecting front sway bar, and a five-link coil rear suspension. These components require periodic inspection for leaks, wear, and proper function. The front axle disconnect actuator and rear electronic-locking differential (E-locker) should also be inspected per the owner's manual. The Power Wagon diesel rides on 34-inch all-terrain tires mounted to 20-inch Satin Black wheels; tire rotation and balancing schedules are particularly important with larger, heavier rubber.
When does the 2027 Ram 2500 arrive at dealerships?
Ram has confirmed the 2027 Ram 2500 Heavy Duty will be in dealerships in August 2025. The Power Wagon with Cummins turbo diesel arrives in the second half of 2026.
Why Service at Johnsons of Kingfisher
Johnsons of Kingfisher stocks Ram 2500 trucks and supports them with factory-trained technicians who know the specific service requirements of the 6.4L HEMI V8 and 6.7L Cummins HO Turbo Diesel. Using genuine OEM parts matters on a truck with this level of engineering complexity, from the hydro-boost brake system on diesel models to the dual-battery electrical setup and the Bilstein-tuned Power Wagon suspension.
For Ram owners in Kingfisher and the surrounding area, servicing your 2500 at the selling dealer means your truck's service history is tied directly to the dealership that knows your configuration, your options, and your ownership pattern. That matters when warranty claims arise, when Ram issues service bulletins, and when resale time comes.
The service team at Johnsons of Kingfisher can pull current Ram technical service bulletins, provide a written estimate for any service need, and advise you on the correct service schedule based on your specific powertrain, trim, and use case before the official 2027 owner's manual becomes widely available. Ram Heavy Duty overview
Get Your 2027 Ram 2500 Serviced Right at Johnsons of Kingfisher
The 2027 Ram 2500 is one of the most capable heavy-duty trucks built, with up to 1,075 lb-ft of Cummins diesel torque and a 20,000-lb towing rating. Keeping that capability intact starts with proper maintenance from technicians who know the platform. Johnsons of Kingfisher is the Ram dealer serving Kingfisher, OK, with factory-trained service and genuine OEM parts for every 2500 configuration. Contact the service department to get on the schedule or to ask specific questions about your powertrain's maintenance requirements.
Frequently Asked Questions
Has Ram published the 2027 Ram 2500 maintenance schedule yet?
Consult the owner's manual when it becomes available, or contact Johnsons of Kingfisher for the most current service guidance.
What oil capacity does the 6.7L Cummins diesel require?
The 6.7L Cummins HO Turbo Diesel requires 12.0 quarts (11.3 liters) with filter. The 6.4L HEMI V8 requires 7.0 quarts (6.6 liters).
Does the 2027 Ram 2500 diesel require DEF?
Yes. The 6.7L Cummins HO Turbo Diesel uses selective catalytic reduction (SCR) for emissions control, which requires Diesel Exhaust Fluid (DEF). The Power Wagon diesel's DEF tank is protected by an underbody skid plate. Refill intervals depend on load and driving conditions; your owner's manual or service advisor can provide specifics.
What fuel does the 2027 Ram 2500 use?
The 6.4L HEMI V8 runs on unleaded regular gasoline (87 octane minimum). The 6.7L Cummins HO Turbo Diesel requires ultra-low sulfur diesel fuel.
How many batteries does the 2027 Ram 2500 diesel have?
The Cummins diesel-equipped Ram 2500 uses dual Group 65 maintenance-free batteries, each rated at 730 CCA. The HEMI V8 uses a single Group 65 battery at 730 CCA.
What warranty comes with the 2027 Ram 2500?
Ram provides separate warranty programs for gas and diesel powertrains. Gas models are covered by a Gas Powertrain Limited Warranty with Gas Roadside Assistance. Diesel models are covered by a Diesel Powertrain Limited Warranty with Diesel Roadside Assistance. Specific term lengths should be confirmed with Johnsons of Kingfisher or through Ram's official warranty documentation.
When will the 2027 Ram 2500 be available at Johnsons of Kingfisher?
Ram has confirmed the 2027 Ram 2500 Heavy Duty will reach dealerships in August 2026. The Power Wagon with the Cummins turbo diesel is confirmed for the second half of 2026. Contact Johnsons of Kingfisher to get on the notification list.
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