Understanding the 2018 Ram 3500 oil capacity is fundamental for any owner who values long-term engine durability and peak performance. This heavy-duty pickup truck is engineered to handle substantial loads and tow demanding trailers, placing unique stress on the powertrain. Ensuring the correct volume of lubricant maintains proper oil pressure, reduces friction, and keeps the engine running cool under strenuous conditions. This guide provides specific details on the fill capacity and offers practical advice for maintenance.
2018 Ram 3500 Engine Oil Specifications
The heart of the 2018 Ram 3500 is its robust powertrain, and the oil serves as its lifeblood. The specific capacity varies slightly depending on whether the truck is equipped with the gasoline-powered 6.7-liter Cummins I6 or the available 6.4-liter Hemi V8. Utilizing the recommended viscosity, such as 15W-40 for the diesel or 5W-30 for the gasoline variants, is just as critical as measuring the correct amount. Always refer to the exact specifications outlined in your vehicle’s owner’s manual to match the engine design and ensure optimal protection.
Oil Capacity for the 6.7L Cummins Diesel
For workhorses equipped with the 6.7-liter Cummins turbodiesel engine, the oil system is designed for durability and extended drain intervals. When performing a complete oil change, including the replacement of the oil filter, the total fill capacity generally falls between 14 and 15 quarts. This higher volume is necessary to adequately lubricate the larger displacement and support the advanced emissions components found in modern diesel engines.
6.7L Oil Change Tips
Use a high-quality diesel-specific oil meeting CJ-4 specifications.
Replace the drain plug gasket and oil filter gasket during every service.
Torque the oil drain plug to the manufacturer’s specifications to prevent stripping.
Check the oil level after the engine has been turned off for several minutes to allow the oil to settle.
Oil Capacity for the 6.4L Hemi V8
Drivers opting for the gasoline-powered 6.4-liter Hemi V8 will find a different oil capacity requirement compared to the diesel variant. This powerhouse typically requires between 6 and 7 quarts of oil for a full refill after the filter is replaced. While the volume is lower, the importance of maintaining clean, high-performance oil remains critical for managing the heat and power output of the V8 configuration.
6.4L V8 Maintenance Notes
Adhere to the recommended SAE 5W-30 viscosity for general driving conditions.
Consider upgrading to a performance oil filter for improved filtration and flow.
Allow the engine to reach operating temperature before checking the oil to ensure an accurate reading.
Monitor for any signs of increased oil consumption between scheduled changes.
Factors Influencing Oil Consumption
While the specifications provide a baseline, real-world conditions can influence how quickly the 2018 Ram 3500 consumes oil. Severe driving environments, such as frequent towing in mountainous terrain or stop-and-go traffic in extreme heat, can degrade oil quality faster than normal highway cruising. Aggressive driving habits also contribute to thermal breakdown, potentially requiring more frequent top-offs between standard oil change intervals.
Best Practices for Checking and Adding Oil
Maintaining the correct oil level is a simple process that yields significant returns in vehicle longevity. Owners should park the truck on a level surface to ensure an accurate reading on the dipstick. After inserting the dipstick fully and wiping it clean, observe both the level and the condition of the oil. Dark, gritty oil indicates it is time for a change, whereas clean oil suggests the current maintenance schedule is effective.
