The 2015 Ram 5.7 oil capacity and type are critical specifications for any owner committed to maintaining the optimal performance and longevity of their Hemi-powered truck. Understanding these details is not merely about routine fluid replacement; it’s about safeguarding one of the most robust and beloved truck engines on the road, ensuring it continues to deliver the power and reliability Ram owners expect. Proper oil maintenance directly impacts everything from engine efficiency to the smooth operation of advanced features like the Multi-Displacement System (MDS).
The Heart of the Beast: Understanding the 5.7L Hemi Engine
The 5.7-liter Hemi V8 engine, a staple in Ram trucks for years, is renowned for its blend of power, torque, and surprising efficiency, thanks in part to technologies like the MDS, which can deactivate cylinders under light load conditions. For such a sophisticated engine to perform at its peak, the correct type and amount of engine oil are paramount. The oil not only lubricates moving parts but also helps cool the engine, clean internal components, and seal piston rings. Using the wrong oil or an incorrect amount can lead to decreased performance, increased wear, and potentially costly repairs.
Getting the Capacity Right: 2015 Ram 5.7 Oil Capacity
For the 2015 Ram 1500, 2500, or 3500 equipped with the 5.7L Hemi engine, the specified engine oil capacity is approximately 7.0 quarts (6.6 liters) when changing the oil and replacing the filter. It’s crucial to always replace the oil filter during an oil change, as this ensures the new oil remains clean and effective for longer.
While 7.0 quarts is the standard guideline, it’s always best practice to:
1. Add slightly less than the full amount: For example, start with 6.5 quarts.
2. Run the engine for a minute: Allow the oil to circulate and fill the new filter.
3. Wait a few minutes: Let the oil drain back into the oil pan.
4. Check the dipstick: Ensure the oil level falls within the safe operating range (between the “min” and “max” marks). Add small amounts as needed until the correct level is reached.
Overfilling can be just as detrimental as underfilling, potentially causing aeration of the oil, increased pressure, and damage to seals. Always verify with the dipstick after an oil change.
Recommended Oil Type for Your 2015 Ram 5.7 Hemi
The choice of oil type is arguably even more critical than the exact capacity, as it directly relates to the engine’s design and operational requirements. For the 2015 Ram 5.7L Hemi engine, the manufacturer explicitly recommends:
Viscosity Grade: SAE 5W-20
API Service Category: API SN, SM, or SP (or equivalent, ensuring it is for gasoline engines)
Chrysler Material Standard: Must meet Chrysler MS-6395
Let’s break down what each of these means and why they are important:
Understanding SAE 5W-20
The “5W-20” designation refers to the oil’s viscosity, or its resistance to flow, at different temperatures.
“5W” (Winter): Indicates how the oil flows in cold temperatures. A lower “W” number means the oil flows more easily at colder temperatures, which is crucial for quick lubrication during cold starts, especially in regions with harsh winters.
“20”: Represents the oil’s viscosity at normal operating temperatures. A lower number here means a thinner oil, which can reduce internal engine friction and improve fuel economy.
For the 5.7L Hemi, the 5W-20 viscosity is specifically chosen to work in harmony with the Multi-Displacement System (MDS). The MDS uses oil pressure to activate and deactivate cylinders, and a specific oil viscosity is required for the system to operate correctly and efficiently. Using an oil that is too thick or too thin can impede MDS function and potentially cause wear.
API Service Category (SN/SP)
The American Petroleum Institute (API) service category denotes the oil’s quality and performance standards.
API SN/SP: These are the latest and most stringent specifications for gasoline engine oils, indicating superior protection against wear, sludge, and piston deposits. They also offer improved fuel economy and better performance with modern emissions control systems. Always choose an oil that meets or exceeds the manufacturer’s recommended API standard.
Chrysler MS-6395 Standard
This is a specific material standard set by Chrysler (now Stellantis) that ensures the oil has been tested and approved to meet their rigorous performance and protection requirements for their engines. This standard often encompasses additive packages and base oil qualities that go beyond general API specifications, tailored precisely for engines like the Hemi. Always look for the MS-6395 designation on the oil bottle to guarantee compatibility and optimal protection for your 2015 Ram.
Why the Right Oil Matters for Your Hemi
Using the correct oil isn’t just a recommendation; it’s a necessity for several reasons:
Engine Longevity: The right oil provides proper lubrication, reducing friction and wear on critical engine components, thus extending the life of your Hemi.
MDS Operation: As mentioned, the MDS system relies on specific oil viscosity and pressure to function correctly. Incorrect oil can lead to issues with cylinder deactivation, affecting fuel economy and potentially causing drivability problems.
Fuel Economy: An engine running with the correct, low-viscosity oil will experience less internal friction, which translates to better fuel efficiency.
Engine Protection: Modern oils with API SN/SP and MS-6395 standards offer superior protection against sludge, varnish, and corrosive byproducts, keeping your engine cleaner and performing better.
Warranty Compliance: Using oil that doesn’t meet manufacturer specifications can, in some cases, void your engine warranty if an oil-related failure occurs.
When to Change Your Oil
For most 2015 Ram 5.7L Hemi trucks under normal driving conditions, the recommended oil change interval is typically 8,000 to 10,000 miles (13,000 to 16,000 km) or 6 to 12 months, whichever comes first. However, this can vary based on several factors:
Driving Conditions: Severe driving conditions (e.g., frequent short trips, towing heavy loads, extreme temperatures, dusty environments, extensive idling) may necessitate more frequent oil changes, often around 4,000 to 5,000 miles (6,500 to 8,000 km) or 3 to 6 months.
Oil Life Monitor: Your 2015 Ram is equipped with an Oil Change Indicator System. This system monitors various engine parameters and driving conditions to determine when an oil change is necessary. It will illuminate a message in your instrument cluster when the oil life is low. Always consult your owner’s manual for specific instructions on how to interpret and reset this system.
DIY Oil Change Tips
If you choose to perform your own oil change, ensure you have:
The correct volume of SAE 5W-20 oil meeting MS-6395 and API SN/SP standards.
A new oil filter (ensure it’s compatible with your 5.7L Hemi).
A wrench for the drain plug and oil filter.
A drain pan with sufficient capacity.
Safety glasses and gloves.
Jack stands for safe vehicle elevation.
Always dispose of used oil responsibly at a certified recycling center.
Conclusion
For 2015 Ram 5.7L Hemi owners, understanding and adhering to the manufacturer’s recommendations for oil capacity and type is non-negotiable for maintaining engine health and performance. Specifically, using approximately 7.0 quarts of SAE 5W-20 oil that meets API SN/SP standards and, critically, the Chrysler MS-6395 material standard, will ensure your Hemi engine continues to deliver reliable power and efficiency for years to come. Always consult your owner’s manual for the most accurate and up-to-date information for your specific vehicle.
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Source:
2015 Ram 1500/2500/3500 Owner’s Manual (specifically the “Maintenance Schedules” and “Fluids, Lubricants and Genuine Parts” sections).