What oil goes into a 3.7 liter Ram truck?
The 3.7-liter Ram V6 typically uses a light engine oil that meets Chrysler’s specifications. In practice, most owners opt for 5W-20 or 5W-30 oil that meets API SN or newer and Mopar’s MS-6395 standard, with either conventional or synthetic formulations. Climate and model year can influence the exact choice, so it’s best to verify in the owner’s manual or on the oil cap.
Recommended oil grades and specifications
To help you choose, these are the standard viscosity and specification options you’ll encounter on jugs and in manuals for the 3.7L Ram engine.
- 5W-20 viscosity that meets API SN (or newer) and Mopar MS-6395 approval. Suitable for most climates; can be conventional or synthetic as long as it meets the MS-6395 spec.
- 5W-30 viscosity that meets API SN (or newer) and Mopar MS-6395 approval. Recommended for hotter climates or heavier loads, and also usable if your manual specifies it.
- Oil type: Conventional, full synthetic, or synthetic blend, provided the oil carries API SN (or newer) and MS-6395 approval. Synthetic options often offer easier cold starts and longer service intervals.
- Do not use oils that lack the MS-6395 approval or API SN/newer; using unapproved oils can affect protection and warranty coverage.
In practice, 5W-20 is the common default for many 3.7L Ram applications, with 5W-30 reserved for warm climates or specific conditions outlined in the owner's manual.
Maintenance considerations and intervals
Oil change intervals depend on whether you run conventional or synthetic oil, and on driving conditions. The following guidance reflects typical ranges and should be adjusted per your manual and usage.
- Conventional oil: Change roughly every 3,000–5,000 miles (4,800–8,000 km) or as recommended by your manual, especially in severe service conditions.
- Synthetic oil or synthetic blend: Change roughly every 5,000–7,500 miles (8,000–12,000 km) or per the manual’s guidance; synthetics generally offer longer intervals and better high-mileage protection.
- General maintenance tips: Always replace the oil filter at each change, check for proper oil level when the engine is off and on level ground, and use the correct filter part number specified for the 3.7L engine.
Always confirm the exact interval and oil specification for your vehicle’s year and trim level in the owner’s manual, or by checking the hood oil-fill sticker. Driving style, climate, and operating conditions can shift these recommendations.
Summary
For the 3.7-liter Ram V6, the standard oil choice is a 5W-20 or 5W-30 viscosity that meets API SN or newer and Mopar MS-6395, with either conventional or synthetic formulations acceptable as long as the specification is met. Climate and model year influence the exact grade, so verify in the manual or on the cap. Use the recommended interval for your oil type, replace the filter with every change, and monitor oil level regularly to maintain engine protection.
