The 2018 Ram 5.7, a popular choice for truck enthusiasts across North America, is celebrated for its robust performance, towing capabilities, and the unmistakable power of its HEMI V8 engine. As with any high-performance engine, proper maintenance, particularly concerning engine oil, is paramount to ensuring its longevity and optimal operation. Understanding the correct oil capacity and type for your 2018 Ram 1500 with the 5.7L HEMI is not just a recommendation; it’s a critical aspect of vehicle care that directly impacts everything from fuel efficiency to engine health. This guide will provide you with all the essential information you need to keep your Ram’s heart beating strong.
The Heart of the Beast: Understanding the 5.7L HEMI
The 5.7-liter HEMI V8 engine has been a cornerstone of Ram trucks for years, known for delivering a potent blend of horsepower and torque. Its distinctive hemispherical combustion chambers contribute to its efficient power delivery and characteristic rumble. For an engine with such a pedigree, specifying the correct lubricants is not an arbitrary choice by the manufacturer; it’s a carefully engineered decision to ensure every internal component is adequately protected against friction, heat, and wear. Using the right oil ensures optimal valve train operation, piston lubrication, and overall engine cleanliness, critical for preventing premature wear and maintaining performance over hundreds of thousands of miles.
2018 Ram 5.7 Oil Capacity: The Numbers You Need
Getting the oil level just right is crucial. Too little oil and components don’t receive adequate lubrication, leading to excessive wear and heat. Too much oil, and you risk aeration, increased crankcase pressure, and potential damage to seals and gaskets.
For the 2018 Ram 5.7L HEMI V8 engine, the recommended oil capacity is 7 quarts (6.6 liters).
It’s important to note that this capacity typically includes the amount of oil needed to fill a new oil filter. When performing an oil change, always ensure you replace the old filter with a new, high-quality one that meets or exceeds OEM specifications. After adding the specified amount of oil, start the engine and let it run for a minute or two to circulate the oil and fill the new filter. Then, shut off the engine, wait a few minutes for the oil to drain back into the pan, and check the oil level using the dipstick. Top off as needed, adding small amounts at a time until the oil level sits between the “MIN” and “MAX” marks on the dipstick.
Choosing the Right Lubricant for Your 2018 Ram 5.7
Selecting the correct oil type is just as important as the quantity. Modern engines, especially those with advanced technologies like cylinder deactivation (MDS – Multi-Displacement System) found in the HEMI, are designed to work with specific oil viscosities and formulations.
The manufacturer’s primary recommendation for the 2018 Ram 5.7L HEMI V8 is SAE 5W-20 full synthetic engine oil.
Here’s a breakdown of what that means and why it’s important:
SAE 5W-20: This refers to the oil’s viscosity. The “W” stands for “winter,” indicating its cold-weather performance. A 5W-20 oil flows easily at cold temperatures (like during a winter start) to quickly lubricate engine parts, reducing wear. At operating temperatures, it maintains a viscosity comparable to a 20-weight oil, providing adequate protection. This specific viscosity is crucial for the HEMI’s MDS system to function correctly, as the system relies on precise oil pressure to activate and deactivate cylinders.
Full Synthetic: While some older engines might tolerate conventional or synthetic blend oils, the 2018 Ram 5.7L HEMI benefits significantly from full synthetic oil. Full synthetics offer superior protection against wear, better resistance to thermal breakdown, and enhanced sludge prevention compared to conventional oils. They also maintain their viscosity more consistently across a wider range of temperatures, which is vital for engine components and systems like MDS.
API Certification and MS-6395 Standard: Always look for oils that carry the latest API (American Petroleum Institute) certification (e.g., API SN, SP) and, crucially, meet Chrysler’s material standard MS-6395. This standard ensures the oil has undergone rigorous testing and meets the specific lubrication requirements of FCA (now Stellantis) engines.
Using an oil that deviates from these specifications can lead to reduced engine efficiency, increased wear, potential issues with the MDS system, and even void your powertrain warranty.
The Importance of Regular Oil Changes for Your Ram
Consistent oil changes are the cornerstone of engine health. Over time, engine oil breaks down, loses its lubricating properties, and accumulates contaminants. For your 2018 Ram 5.7, adhering to the recommended oil change intervals is key.
Standard Driving Conditions: Under normal driving conditions, Ram typically recommends an oil change every 8,000 to 10,000 miles (13,000 to 16,000 km) or every 6 to 12 months, whichever comes first.
Severe Driving Conditions: If your driving habits involve frequent short trips, extensive idling, towing heavy loads, off-road driving, or operation in extremely dusty conditions, more frequent oil changes (e.g., every 3,000-5,000 miles or 3-6 months) may be necessary.
Oil Life Monitor: Your 2018 Ram 1500 is equipped with an Oil Life Monitor (OLM) system. This system continuously monitors engine operating conditions and driving style to determine when an oil change is needed. While a helpful guide, it’s always wise to consult your owner’s manual and adjust based on your specific usage.
Conclusion
Maintaining your 2018 Ram 1500 with the 5.7L HEMI engine is a straightforward process when you know the specifics. By using the correct 7-quart capacity of SAE 5W-20 full synthetic engine oil that meets the MS-6395 standard, and by adhering to a regular oil change schedule, you’re investing in the longevity and reliable performance of your truck. Always consult your owner’s manual for the most accurate and up-to-date information, as specific recommendations can sometimes vary based on regional requirements or slight model variations. Proper oil maintenance is a small effort that yields significant returns in performance, durability, and peace of mind for miles to come.
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Source:
2018 Ram 1500 Owner’s Manual, FCA US LLC. (Referenced for general manufacturer specifications)