The 2018 Ram 1500 equipped with the 5.7L HEMI V8 engine is a powerful full-size pickup built for towing, hauling, and long-distance reliability. Proper oil maintenance is essential to keep the HEMI engine running smoothly and to protect its Multi-Displacement System (MDS).
Using the correct oil type, maintaining proper oil capacity, and following recommended service intervals ensures long engine life and consistent performance under heavy loads.
Why Oil Maintenance Matters for the 5.7L HEMI
The 5.7L HEMI V8 uses advanced valvetrain and cylinder deactivation technology (MDS), which depends on stable oil pressure and clean lubrication. Dirty or incorrect oil can lead to lifter noise, poor fuel economy, and long-term engine wear.
Regular oil changes are critical for maintaining performance, especially in towing or stop-and-go driving conditions.
2018 Ram 1500 5.7 Oil Type (Recommended)
- Primary recommendation: SAE 5W-20 full synthetic oil
- Specification: API SN / SP or Chrysler MS-6395 approved oil
- Alternative (heavy-duty use only): 5W-30 in some conditions (not factory preferred)
Best Choice: Always use high-quality 5W-20 full synthetic oil to ensure proper MDS operation and maximum engine protection.
2018 Ram 1500 5.7 Oil Capacity
Always verify oil level using the dipstick after filling. Slight variation may occur depending on filter brand and drainage conditions.
2018 Ram 1500 Oil Change Interval
- Normal driving: Every 6,000–7,500 miles
- Heavy towing / hauling: Every 4,000–6,000 miles
- Severe conditions (dust, heat, stop-and-go traffic): Every 3,000–5,000 miles
2018 Ram 1500 Oil Change Cost
- DIY: $60 – $110
- Independent shop: $120 – $200
- Dealer service: $200 – $320
Signs You Need an Oil Change
- Lifter tick or engine noise
- Reduced fuel economy
- Dark or dirty engine oil
- Oil pressure fluctuations
- Rough idle or hesitation
- Burning oil smell
Maintenance Tips for Long Engine Life
- Always use Chrysler MS-6395 approved oil
- Replace oil filter at every oil change
- Avoid long oil change intervals with heavy towing
- Check oil level every 1,000–2,000 miles
- Allow engine warm-up before heavy load
- Inspect for leaks regularly
Frequently Asked Questions (FAQ)
What oil does a 2018 Ram 1500 5.7 take?
It requires SAE 5W-20 full synthetic oil for proper HEMI and MDS performance.
How much oil does it hold?
The 5.7L HEMI engine holds approximately 7 quarts with filter change.
Can I use 5W-30 instead of 5W-20?
5W-20 is recommended; 5W-30 may be used in specific cases but is not factory preferred.
How often should I change oil?
Every 6,000–7,500 miles depending on driving conditions.
Is the 5.7 HEMI reliable?
Yes, it is highly reliable when properly maintained with regular oil changes.
Final Thoughts
The 2018 Ram 1500 5.7 HEMI is a strong and durable engine, but it depends heavily on clean, correctly specified engine oil. Following proper oil type, capacity, and maintenance intervals ensures long-term reliability and performance.