Gasoline versions of the 2015 RAM 1500 typically use synthetic oil in 0W-20 for the 3.6L Pentastar and 5W-20 for the 5.7L HEMI, while the EcoDiesel 3.0L requires a full-synthetic diesel oil such as 5W-40. Always check the owner’s manual or with a dealer for the exact viscosity and specification for your engine and climate.
Engine-specific oil requirements
Gasoline engines
The 2015 RAM 1500 offered several gasoline options. The following are the typical oil specifications you should look for, with capacity estimates noted:
- 3.6L Pentastar V6 — Synthetic motor oil, viscosity 0W-20; meets Mopar MS-6395 (or equivalent API/SN rating); approximate capacity about 5 quarts with filter.
- 5.7L HEMI V8 — Synthetic motor oil, viscosity 5W-20; meets Mopar MS-6395 (or equivalent API/SN rating); approximate capacity about 7 quarts with filter.
These values reflect the common factory recommendations used by FCA for the 2015 RAM 1500 lineup. Always confirm the exact specification for your particular build and climate since some dealers may permit a narrow range of viscosities.
Diesel engine
The EcoDiesel option for the 2015 RAM 1500 uses a different oil standard. The typical specification is:
- 3.0L EcoDiesel V6 — Full-synthetic diesel oil, viscosity 5W-40; API CK-4 or CJ-4 compliant; appropriate for VM Motori engines; approximate capacity around 7 quarts with filter.
Diesel engines have stricter requirements due to exhaust aftertreatment, so it’s important to use oil that specifically meets CK-4/CJ-4 and any VM Motori or FiatChrysler requirements noted in your manual.
Oil change intervals and service tips
Oil-change intervals vary by engine and driving conditions. In general, synthetic oil enables longer intervals, but you should follow the schedule in the owner’s manual and consider your driving habits. The guidance below reflects common practice for the 2015 RAM 1500 lineup.
Gasoline engines oil-change intervals
- Under normal driving conditions: about every 7,500 miles (12,000 km) or every 12 months, whichever comes first, when using synthetic 0W-20 (3.6L) or 5W-20 (5.7L).
- Under severe or high-stress conditions (towing, heavy loads, frequent short trips): more frequent changes, typically 3,000–5,000 miles (5,000–8,000 km).
Diesel engine oil-change intervals
- For the 3.0L EcoDiesel, a longer interval is common when using CK-4/CJ-4 diesel oil, often around 7,500–10,000 miles (12,000–16,000 km) or 12 months, whichever comes first. In severe service, follow the manual guidance, which may call for shorter intervals.
Tip: Always monitor oil life indicators if equipped, and adjust intervals for extreme temperatures, frequent towing, or prolonged idling.
What to look for when buying oil
Choosing the right oil isn’t just about viscosity. Look for the following specifications to ensure compatibility with a 2015 RAM 1500:
- Viscosity: 0W-20 for the 3.6L Pentastar; 5W-20 for the 5.7L HEMI; 5W-40 for the EcoDiesel.
- Quality standards: API SN or better; ILSAC GF-5 or newer; and Mopar MS-6395 for FCA gasoline engines.
- Type: Full synthetic motor oil is commonly recommended for all three engines to maximize protection and extend oil-change intervals.
When in doubt, choose a product labeled as full synthetic, meeting MS-6395 for FCA gasoline engines or CK-4/CJ-4 for the EcoDiesel, and verify compatibility with your specific engine model and climate.
Bottom line for owners
For a 2015 RAM 1500, use synthetic oil that matches your engine's specification: 0W-20 for the 3.6L Pentastar, 5W-20 for the 5.7L HEMI, and 5W-40 CK-4/CJ-4 for the EcoDiesel. Adhere to the change intervals in your manual, adjust for severe service, and keep an eye on oil life indicators to maintain performance and longevity.
Summary
The 2015 RAM 1500 requires engine-specific synthetic oils: 0W-20 for the 3.6L Pentastar, 5W-20 for the 5.7L HEMI, and 5W-40 CK-4/CJ-4 for the EcoDiesel. Follow FCA’s MS-6395 guidelines for gasoline engines and CK-4/CJ-4 guidelines for the diesel, and consult your owner’s manual for exact intervals and climate considerations. Regular maintenance and using the correct oil will help keep the truck performing reliably for years to come.
What oil does a 2015 RAM 1500 take?
RAM 1500 Oil Specifications by Model Year
| Engine | Years Available | Oil Type |
|---|---|---|
| 5.7L V8 HEMI | 2011-2012 | 5W-20 Conventional or Synthetic |
| 5.7L V8 HEMI | 2013-2021 | 5W-20 Full Synthetic |
| 5.7L V8 HEMI eTorque | 2022-2024 | 0W-20 Full Synthetic |
| 5.7L V8 HEMI eTorque | 2026 | 0W-20 Full Synthetic (MS-6395) |
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How much oil does a 2015 RAM 1500 5.7 V8 use?
7 quarts
Oil Grade: SEO11
| Viscosity: | 5W-20 (All TEMPS) |
|---|---|
| Capacity: | 7 quarts (with filter). After refill check oil level. |
| Torque: | 25 ft/lbs (Oil Drain Plug) |
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What is the best oil for RAM 1500 5.7 HEMI?
SAE 5W-20 full
RAM 1500 Oil Type Recommended by the Manufacturer
If you own a RAM 1500 with a gasoline engine, the manufacturer recommends SAE 0W-20 full synthetic oil for the 3.6L V6 gasoline engine. Use the SAE 5W-20 full synthetic oil if your truck has the 5.7L V8 HEMI gasoline engine.
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Is the RAM 1500 0w20 or 5w20?
2019-newer Ram 1500 trucks with the 5.7L HEMI require 0W-20 synthetic oil meeting Chrysler MS-6395 specifications, while 2009-2018 models typically use 5W-20.
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