Essential Guide to 2018 Ram 1500 Oil: Capacity, Type, and Maintenance
2018 Ram 1500 oil capacity and type are critical specifications for maintaining the longevity and optimal performance of your truck’s engine. Understanding these details ensures that your Ram operates efficiently, protects vital engine components, and adheres to manufacturer warranty requirements. This guide will break down the specific oil requirements for each of the popular engine options available in the 2018 Ram 1500 lineup, helping you make informed decisions about your truck’s maintenance.
The engine oil in your Ram 1500 performs several crucial functions: it lubricates moving parts to reduce friction and wear, helps cool the engine by transferring heat away from critical areas, cleans the engine by suspending dirt and contaminants, and provides a seal between the piston rings and cylinder walls. Using the correct type and amount of oil is paramount to these functions.
Understanding Your 2018 Ram 1500’s Engine Options
The 2018 Ram 1500 was available with a few robust engine choices, each with its unique oil requirements. These included:
3.6L Pentastar V6: A reliable and fuel-efficient gasoline engine, standard on many trims.
5.7L HEMI V8: A powerful gasoline engine known for its torque and towing capabilities.
3.0L EcoDiesel V6: A torque-rich, fuel-efficient diesel engine, offering impressive towing and highway mileage.
Each of these engines demands specific oil characteristics to perform at its best and last for years.
3.6L Pentastar V6: Oil Capacity and Type
The 3.6L Pentastar V6 engine, a staple in many Ram 1500 models, is renowned for its balance of power and efficiency.
Oil Capacity: For the 3.6L Pentastar V6, the typical oil capacity is 5.9 quarts (5.6 liters) when performing an oil and filter change. Always ensure you check the dipstick after adding oil to confirm the correct level.
Oil Type: The recommended engine oil for the 3.6L Pentastar V6 is SAE 5W-20 full synthetic engine oil. It’s crucial that the oil meets Chrysler’s material standard MS-6395 and carries the American Petroleum Institute (API) certification mark (e.g., API SN or SP, and ILSAC GF-5 or GF-6). Synthetic oil provides superior protection against wear, better cold-start performance, and improved resistance to breakdown under high temperatures compared to conventional oils.
5.7L HEMI V8: Oil Capacity and Type
The legendary 5.7L HEMI V8 engine is a popular choice for those seeking maximum power and towing capability from their 2018 Ram 1500.
Oil Capacity: The 5.7L HEMI V8 typically requires 7.0 quarts (6.6 liters) of oil during an oil and filter change. As with any engine, verify the oil level with the dipstick after filling.
Oil Type: For the 5.7L HEMI V8, the recommended oil is SAE 5W-20 full synthetic engine oil. Similar to the Pentastar, it must meet Chrysler material standard MS-6395 and have the appropriate API certification (e.g., API SN or SP, and ILSAC GF-5 or GF-6). Some owners’ manuals or service bulletins might indicate an option for 0W-20 in certain conditions, but 5W-20 is the most commonly specified viscosity for the 2018 model year. The specific low viscosity is essential for the HEMI’s Multi-Displacement System (MDS), which allows the engine to deactivate cylinders for improved fuel economy.
3.0L EcoDiesel V6: Specialized Oil Requirements
The 3.0L EcoDiesel V6 stands out with its impressive torque and fuel efficiency, but it also has very specific and critical oil requirements due to its diesel particulate filter (DPF) and other emissions control systems.
Oil Capacity: The 3.0L EcoDiesel V6 has a larger oil capacity, typically requiring 10.5 quarts (9.9 liters) of oil during an oil and filter change. Due to the precision required for diesel engines, always double-check the dipstick.
Oil Type: This is where the EcoDiesel’s oil requirements significantly diverge from the gasoline engines. It demands a specialized synthetic low-ash engine oil, specifically SAE 5W-30. Critically, this oil must meet Chrysler material standard MS-11106 and ACEA C3 specifications. The “low-ash” characteristic (C3) is paramount for protecting the Diesel Particulate Filter (DPF) from clogging. Using the wrong type of oil can lead to premature DPF failure, costly repairs, and potential warranty voidance. Do NOT use standard gasoline engine oil or conventional diesel engine oil that does not meet the specified low-ash and Chrysler standards.
Why Choosing the Right Oil is Crucial for Your 2018 Ram 1500
Using the correct oil type and capacity isn’t just a recommendation; it’s a necessity for several reasons:
1. Engine Longevity: The right oil provides optimal lubrication, reducing wear and tear on pistons, bearings, and other critical engine components.
2. Performance & Fuel Efficiency: Correct viscosity ensures the oil flows properly at various temperatures, contributing to efficient engine operation and potentially better fuel economy. In HEMI engines, it’s vital for the MDS system.
3. Emissions System Protection: For the EcoDiesel, the specific low-ash oil is critical to prevent damage and clogging of the Diesel Particulate Filter (DPF), which is an expensive component to replace.
4. Warranty Compliance: Using oil that doesn’t meet manufacturer specifications can void your vehicle’s powertrain warranty.
5. Preventing Sludge & Deposits: High-quality synthetic oils, as recommended, resist thermal breakdown and help prevent the formation of harmful sludge and carbon deposits.
Oil Change Intervals and Best Practices
While specific intervals can vary based on driving conditions and your truck’s oil life monitoring system, a general guideline for the 2018 Ram 1500 is typically 7,500 to 10,000 miles or 6 to 12 months for gasoline engines, and often 10,000 miles or 12 months for the EcoDiesel (or as indicated by the oil life monitor).
Consult Your Owner’s Manual: Always refer to your 2018 Ram 1500’s owner’s manual for the most definitive and up-to-date information regarding oil capacity, type, and recommended change intervals. It is the ultimate authority for your specific vehicle.
Use Quality Filters: Always pair the correct oil with a high-quality oil filter that meets or exceeds OEM specifications. A good filter is just as important as the oil in keeping your engine clean.
Check Oil Level Regularly: Even between changes, it’s a good practice to check your oil level periodically, especially before long trips or heavy towing.
By adhering to these guidelines for your 2018 Ram 1500’s oil capacity and type, you’ll ensure your truck continues to perform reliably, efficiently, and powerfully for many miles and years to come.
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Source:
2018 Ram 1500 Owner’s Manual and Service Information
Manufacturer’s Recommended Service Specifications