2026 Ram 2500 Maintenance Schedule
Complete Service Intervals for 6.4L HEMI V8 & 6.7L Cummins Turbo Diesel Powertrains
Proudly serving Brevard, Asheville, Hendersonville, Fletcher & Cherokee NC
Ram 2500 Scheduled Maintenance Overview
The Ram 2500 heavy-duty pickup offers two engines: the 6.4L HEMI V8 (gas) and the legendary 6.7L Cummins Turbo Diesel I-6 in standard or high-output tune. Each has very different oil specs, capacities, and intervals. Cummins owners should pay particular attention to oil and filter quality. Our Mopar-certified team handles both gas and diesel service with OEM-spec parts.
Ram 2500 uses the Stellantis Oil Change Indicator System. Cummins owners: severe-duty use (heavy towing, frequent idling, dusty conditions) shortens intervals to 7,500 miles maximum. Stellantis specifies never exceeding 10,000 miles or 12 months on HEMI; Cummins follows its own oil-life indicator with intervals up to 15,000 miles for light use, 7,500 for severe.
Oil & Filter
HEMI: every OLM
Cummins: 7,500-15,000 mi
Tire Rotation
Every 6,000-8,000 mi
(LT-rated HD)
Air & Fuel Filter
Cabin 24,000 mi
Cummins fuel/water sep every 15,000 mi
DEF (Cummins)
Topped off at every service
~15,000 mi tank
Complete Maintenance Schedule by Mileage
| Mileage Interval | Services Performed |
|---|---|
| Every Oil Change | Change engine oil & filter • Rotate tires & inspect tread • Multi-point inspection • Inspect brake pads, rotors & hoses • Inspect transmission fluid level • Inspect transfer case & 4WD system • Inspect cooling system • (Cummins) Drain water separator • Top off DEF • Inspect air filter • (Cummins) Inspect turbo & exhaust brake operation |
| 15,000 Miles (Cummins) | All of the above + Replace fuel filter and water separator (Cummins) |
| 30,000 Miles | All of the above + Replace cabin and engine air filter • Inspect transfer case & axle vent tubes |
| 60,000 Miles (Severe / Tow) | All of the above + Change transfer case fluid (severe) • Change front & rear differential fluid (severe / heavy tow) • Change automatic transmission fluid (severe / heavy tow) |
| 100,000 Miles | All of the above + Replace spark plugs (HEMI) • (Cummins) Crankcase ventilation filter service • Inspect accessory drive belt |
| 150,000 Miles | All of the above + Change automatic transmission fluid (normal) • Change all driveline fluids (normal) • (Cummins) DEF system inspection |
| Engine Coolant | Mopar OAT coolant: HEMI 10/150K first then 5/100K. Cummins follows its own coolant schedule — see service book. |
Time-Based Service
Brake fluid: Replace every 2-3 years for HD truck use. Coolant: Mopar OAT (HEMI); Cummins-specific coolant (yellow OAT) for diesel. Cummins DEF: Topped off at every service.
Engine-Specific Maintenance Details
The 2026 Ram 2500 offers gas HEMI V8 or Cummins Turbo Diesel I-6 in standard or high-output. Cummins is the popular HD choice but adds diesel-specific service items.
| Specification | 6.4L HEMI V8 (Gas) | 6.7L Cummins Turbo Diesel (Standard) | 6.7L Cummins Turbo Diesel (HO) |
|---|---|---|---|
| Oil Type | SAE 0W-40 Full Synthetic | SAE 15W-40 CES 20081 (or 5W-40 synthetic) | SAE 15W-40 CES 20081 (or 5W-40 synthetic) |
| Oil Capacity | 7.0 qt (with filter) | 12.0 qt (with filter) | 12.0 qt (with filter) |
| Oil Filter | Mopar MO-491 | Cummins LF16035 (Fleetguard) | Cummins LF16035 (Fleetguard) |
| Spark Plugs / Glow Plugs | Mopar SPLZAR14LR-13 (x16) | Glow plugs (diesel; per service book) | Glow plugs (diesel; per service book) |
| Spark Plug / Glow Plug Interval | 100,000 miles | Per service manual | Per service manual |
| Transmission Fluid | Mopar 8-Speed ATF | Mopar HD ATF | Aisin 6-Speed ATF (HO) |
| Additional Notes | 410 hp / 429 lb-ft | 370 hp / 850 lb-ft; DEF required | 430 hp / 1,075 lb-ft; DEF required; Aisin transmission |
Cummins Diesel, Towing & Heavy-Duty Maintenance
The Cummins 6.7L Turbo Diesel is the heart of the Ram 2500 heavy-duty experience. Diesel ownership adds maintenance items not present on gas trucks — fuel filter and water separator service, DEF (Diesel Exhaust Fluid) refills, exhaust brake operation, and proper warm-up procedures.
- Use only diesel-spec oil meeting CES 20081 — never substitute light-duty gas-engine oil.
- Fuel filter and water separator service every 15,000 miles. Drain water separator at every fill-up if running biodiesel blends.
- DEF (Diesel Exhaust Fluid) is required — use only ISO 22241 spec fluid; avoid generic urea solutions.
- DEF tank typically lasts 15,000 miles between refills under normal driving.
- Cummins exhaust brake reduces friction brake wear on downhill descents — use it for extended Western NC descents.
- Cold-start in winter: let the Cummins warm up before high-load operation. Glow plug systems work but cold oil flows slowly.
- Towing 17,000+ lbs is heavy-duty severe-use — shorten all fluid intervals accordingly.
- Aisin transmission (HO Cummins) has its own service schedule — see service manual.
Severe & Special Operating Conditions
Stellantis and Cummins define severe operating conditions as any of the items below. Most HD truck owners qualify for at least one.
- Towing heavy loads regularly (15,000+ lbs)
- Extended idling (waiting in trailer queues, etc.) — common HD truck use
- Operating in dusty conditions or gravel forest roads
- Sustained mountain grade driving (Western NC routes)
- Frequent short trips that prevent engine warm-up
- Extreme cold weather (below 0°F) or extreme heat (above 100°F)
- Heavy stop-and-go traffic
- Off-road duty or jobsite operation
Service for Ram 2500 Owners Across Western NC
Ram 2500 owners across Western NC use these trucks for serious work — hauling materials around Brevard, towing campers and equipment to Asheville and Hendersonville, climbing mountain grades to Fletcher and Cherokee NC, plus heavy-duty fleet operations across the region. Mountain grade descents stress brakes (use the Cummins exhaust brake!). Heavy towing stresses transmission. Cold winter starts stress the Cummins. Our Mopar-certified team includes diesel-trained technicians who know the 6.7L Cummins inside and out.
Monthly & Semi-Annual Owner Checks
Between scheduled service visits, a few quick owner checks help catch problems before they become repairs. These take only a couple of minutes and apply to every Ram 2500.
- Tire pressure — check before every loaded run; LT-rated HD tires have specific load-and-pressure curves.
- Engine oil level — check every fuel fill-up for Cummins; HEMI weekly.
- Coolant level — verify monthly; Cummins overheating causes major damage.
- DEF level — check at every fuel fill-up; running out of DEF will derate the truck.
- Brake fluid level — check monthly; HD braking systems benefit from inspection.
- Trailer hitch and electrical connections — inspect at each tow trip.
- Fuel water separator — drain at every fill-up if water present.
- Visual underbody check — fluid leaks, damaged exhaust components after any heavy work.
Note on Pricing: Ram 2500 service pricing varies significantly between HEMI and Cummins. Cummins fuel filter and water separator service is recurring. DEF refills add to operating cost. Aisin transmission service (HO Cummins) is higher than standard 8-speed. Call (828) 492-2121 for engine-specific quotes.
Schedule Your Ram 2500 Maintenance at Mahon CDJR
Mahon CDJR is your authorized Ram service center for the HD 2500. Our Mopar-certified team includes diesel-trained technicians for Cummins service and HD gas technicians for the 6.4L HEMI. Schedule online or call our service team.
Created June 22, 2026 by MM Dealer Advocates