The 2018 Ram 2500 oil capacity and type are crucial specifications for maintaining the longevity and optimal performance of this robust heavy-duty pickup. Understanding these details ensures your truck’s engine remains well-lubricated, clean, and protected, whether you’re hauling a heavy load, navigating tough terrain, or simply commuting. The Ram 2500, known for its formidable power and durability, offers a choice of powerful engines, each with its own specific oil requirements.
Why Engine Oil is Paramount for Your 2018 Ram 2500
Engine oil is often referred to as the lifeblood of your vehicle. In a truck as hardworking as the 2018 Ram 2500, its role is even more critical. Oil performs several vital functions:
1. Lubrication: It reduces friction between moving parts, preventing wear and tear that can lead to costly repairs.
2. Cooling: Oil helps dissipate heat generated by combustion and friction, preventing engine overheating.
3. Cleaning: It carries away dirt, sludge, and microscopic metal particles, keeping the engine’s internal components clean.
4. Sealing: Oil forms a seal between the piston rings and cylinder walls, helping to maintain compression.
5. Corrosion Protection: Additives in the oil protect metal surfaces from rust and corrosion.
Using the correct oil type and capacity ensures all these functions are performed effectively, preserving your engine’s health and maximizing its lifespan.
Understanding the 2018 Ram 2500 Engine Options
For 2018, the Ram 2500 was available with three distinct engine choices, each catering to different needs and, consequently, requiring specific engine oil formulations and capacities:
5.7L HEMI V8 Gasoline Engine: A reliable workhorse, standard on many trims.
6.4L HEMI V8 Gasoline Engine: Offering more power and torque, an excellent upgrade for heavier tasks.
6.7L Cummins Turbo Diesel I6 Engine: The legendary diesel option, renowned for its incredible towing capabilities and efficiency.
Because of the vast differences in how these engines operate – especially between gasoline and diesel – their oil specifications are not interchangeable.
Essential 2018 Ram 2500 Oil Capacity and Type Information by Engine
To help you properly maintain your truck, here’s a breakdown of the specific oil requirements for each engine option in the 2018 Ram 2500. Always refer to your owner’s manual for the most definitive and up-to-date information, as slight variations can occur based on model year, region, or specific vehicle configuration.
5.7L HEMI V8 Gasoline Engine
Oil Capacity: Approximately 7.0 quarts (6.6 liters) with a filter change.
Recommended Oil Type: SAE 5W-20 full synthetic engine oil.
API Service Category: It’s essential to use oil that meets or exceeds API Service Category SN, SP, or a similar Chrysler material standard (e.g., MS-6395). Full synthetic oil is generally recommended for its superior performance and protection.
6.4L HEMI V8 Gasoline Engine
Oil Capacity: Approximately 7.0 quarts (6.6 liters) with a filter change.
Recommended Oil Type: SAE 5W-20 full synthetic engine oil.
API Service Category: Similar to the 5.7L HEMI, look for oil that meets or exceeds API Service Category SN, SP, or Chrysler material standard MS-6395. The slightly larger engine still benefits from the same viscosity for optimal lubrication and fuel efficiency.
6.7L Cummins Turbo Diesel I6 Engine
Oil Capacity: A significantly larger capacity, typically around 12.0 quarts (11.3 liters) with a filter change.
Recommended Oil Type: SAE 15W-40 or SAE 5W-40 heavy-duty diesel engine oil. For colder climates, 5W-40 synthetic offers better cold-start performance.
API Service Category: This is crucial for diesel engines. You must use oil that meets or exceeds API Service Category CJ-4 or CK-4. These specifications are designed for diesel engines with modern emissions systems (like diesel particulate filters) and provide enhanced protection against wear, soot, and acid accumulation. Do not use gasoline engine oil in a diesel engine, as it lacks the necessary additives for diesel operation.
Choosing the Right Oil Beyond Capacity and Type
While capacity and type are primary, a few other factors enhance your oil choice:
Full Synthetic vs. Conventional: While some manufacturers might allow conventional oils, full synthetics offer superior protection, better flow in cold weather, improved resistance to breakdown under high heat, and often allow for extended oil change intervals (though always follow your manual’s recommendations). Given the investment in a Ram 2500, full synthetic is almost always the better choice.
API Certification: Always look for the API “starburst” symbol on gasoline engine oil containers (indicating SN, SP, etc.) or the API service symbol on diesel oil containers (indicating CJ-4, CK-4). This ensures the oil has met rigorous industry standards.
Manufacturer Specifications (MS codes): Chrysler/Ram often specifies their own material standards (e.g., MS-6395 for gasoline engines). If an oil explicitly states it meets these, it’s a strong indicator of suitability.
Recommended Oil Change Intervals
The 2018 Ram 2500, like any modern vehicle, benefits from regular oil changes. The exact interval can vary based on:
Engine Type: Diesel engines often have longer intervals due to their large oil capacity and specific oil formulations.
Driving Conditions: Heavy towing, frequent short trips, dusty environments, or extreme temperatures (hot or cold) can necessitate more frequent oil changes.
Oil Type: Full synthetic oils often allow for longer intervals than conventional oils.
Owner’s Manual: Always consult your 2018 Ram 2500 owner’s manual. It provides the most accurate and conservative recommendations for your specific truck. Many modern vehicles also have an Oil Change Indicator System that monitors driving conditions and engine parameters to recommend when an oil change is due.
As a general guideline:
Gasoline HEMI Engines: Typically every 6,000 to 10,000 miles or 6-12 months, depending on conditions and oil type.
6.7L Cummins Diesel Engine: Often every 10,000 to 15,000 miles or 12 months, though severe duty can reduce this.
The Importance of a Quality Oil Filter
Don’t overlook the oil filter! A high-quality oil filter is just as important as the oil itself. It traps contaminants, preventing them from circulating through your engine. Always replace the oil filter with a new one every time you change the oil. Using genuine Mopar filters or reputable aftermarket equivalents designed for your specific engine is highly recommended.
Conclusion
Understanding the 2018 Ram 2500 oil capacity and type for your specific engine is fundamental to its long-term health and reliability. Whether you drive a HEMI gasoline or a Cummins diesel, using the correct viscosity, API specification, and capacity of engine oil, coupled with regular changes and a quality filter, will ensure your heavy-duty Ram continues to perform powerfully and efficiently for years to come. When in doubt, always consult your owner’s manual or a certified Ram service technician.
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Source:
2018 Ram 2500 Owner’s Manual (consult specific vehicle’s manual for definitive information)
* General Automotive Maintenance Guidelines and API Service Categories