For the 2015 Ram 1500 with a 5.7 HEMI, the recommended oil is SAE 5W-20, typically synthetic or synthetic-blend, meeting API SN or newer and Mopar/Chrysler approval. The engine oil capacity is about 7 quarts (with filter).
This article explains the official specification, the reasoning behind the viscosity choice, and practical guidance for selecting the right oil based on climate, maintenance schedules, and certification. It also covers how to read oil labels, typical change intervals, and tips to ensure you stay within factory guidelines while protecting the 5.7 HEMI engine.
Recommended oil types
The following list summarizes the acceptable oil types for the 5.7 HEMI engine, focusing on viscosity, certification, and brand alignment with Chrysler specs.
- Mopar/Synthetic or Synthetic Blend 5W-20 that meets API SN or newer and Chrysler MS-6395 certification.
- Other brand oils labeled 5W-20 that meet API SN or newer and carry a Chrysler/MS-6395 approval on the label.
- Full synthetic 5W-20 or synthetic-blend 5W-20 from reputable brands (e.g., Castrol, Pennzoil, Shell, Valvoline) that explicitly state API SN/ILSAC GF-5 and Chrysler/Mopar compatibility.
Conclusion: The key requirement is 5W-20 viscosity with an API SN or newer rating and Chrysler/MS-6395 certification. Choose a brand you trust as long as the spec is clearly met on the bottle.
Viscosity and climate considerations
While 5W-20 is the standard recommendation for the 5.7 HEMI in a 2015 Ram 1500, climate and driving conditions can affect the optimal choice. In extremely hot climates or for frequent heavy towing, some owners opt for a higher-viscosity oil if approved by the manual or dealer guidance, but 5W-20 remains the baseline for this engine in normal conditions.
- Cold weather: 5W-20 ensures easier cold start and quicker oil flow.
- Warm to hot climates: 5W-20 still works well; consider synthetic for protection during high temps.
- Heavy towing or severe service: consult the dealer about whether a 5W-30 option is permitted for your vehicle’s exact configuration.
Conclusion: Always check the owner’s manual or with a dealership for climate-specific guidance. The default recommendation is 5W-20, with flexibility only if explicitly approved for your use case.
Oil capacity and change intervals
Knowing the capacity and maintenance schedule helps you plan oil changes accurately.
- Oil capacity: About 7 quarts (with filter); verify the exact figure in your owner's manual for your specific trim and drain setup.
- Change interval with synthetic oil: Typically around 7,500 miles (12,000 km) under normal driving conditions.
- Change interval with conventional oil: Generally 3,000–5,000 miles (4,800–8,000 km) depending on driving habits and conditions.
- Oil life monitor: The 2015 Ram uses an oil life monitoring system that prompts service when needed; follow its readings for best results.
Conclusion: Use the indicated capacity and adhere to the recommended intervals, adjusting for your driving style and oil type. Reset the monitor after every oil change and keep receipts as part of maintenance records.
What to look for on the oil bottle
When shopping for oil, verify these specifications on the label to ensure compatibility with the 5.7 HEMI.
- Viscosity: 5W-20
- API service designation: SN or newer
- ILSAC rating: GF-5 or newer
- Chrysler/MS-6395 certification or Mopar approval on the bottle
Conclusion: If the bottle lists all four items clearly, it meets the required spec for the 2015 Ram 1500 5.7 HEMI. Avoid oils that do not carry these certifications or viscosity ratings.
Practical tips for maintenance
To keep your 5.7 HEMI running smoothly, follow these practical steps when selecting oil and planning changes.
- Stick to 5W-20 unless the manual or dealer approves an alternative for your climate or usage.
- Choose a reputable brand with Mopar/MS-6395 certification for peace of mind.
- Record oil type, batch, and change date in your maintenance log for warranty and resale considerations.
Conclusion: Consistency in oil type and change intervals helps maintain engine protection, fuel efficiency, and engine longevity.
Summary
The 2015 Ram 1500 with a 5.7 HEMI is designed to run on SAE 5W-20 motor oil, preferably synthetic or synthetic-blend, that meets API SN or newer and carries Mopar/Chrysler MS-6395 certification. Expect about 7 quarts of oil per change, with recommended intervals around 7,500 miles for synthetic oil and shorter intervals for conventional oil. Always verify viscosity, certification, and API/ILSAC ratings on the oil bottle, and consult your dealer for climate-specific guidance or any dealer-approved alternatives.