The 2018 Ram 1500 5.7L HEMI V8 is one of Chrysler’s most popular and durable engines, widely used for towing, highway driving, and heavy-duty performance. Proper engine oil selection is essential to maintain its Multi-Displacement System (MDS), reduce engine wear, and ensure long-term reliability.
Because the HEMI operates under high heat and load conditions, using the correct viscosity and full synthetic formulation is critical for protecting lifters, camshaft components, and maintaining smooth performance.
2018 Ram 1500 5.7 HEMI Oil Type
The recommended oil type for the 2018 Ram 1500 5.7 HEMI is:
- SAE 5W-20 full synthetic engine oil (factory recommended)
- Must meet Chrysler MS-6395 specification
5W-20 synthetic oil is engineered for proper lubrication of the HEMI engine’s variable valve timing and MDS system, ensuring smooth cylinder deactivation and optimal fuel efficiency.
Best Choice: SAE 5W-20 full synthetic oil meeting MS-6395 standard for maximum engine protection.
2018 Ram 1500 Oil Capacity (5.7 HEMI)
Oil capacity includes a full oil and filter change. Always verify dipstick level after refilling.
Always avoid overfilling. Excess oil can affect MDS operation and may lead to performance issues or increased oil consumption.
Best Oil for Ram 1500 5.7 HEMI
High-quality full synthetic oil is essential for protecting the HEMI engine under towing, highway cruising, and hot climate conditions.
Recommended Oil Brands
- Pennzoil Platinum 5W-20
- Mobil 1 Extended Performance
- Valvoline Advanced Full Synthetic
- Castrol EDGE 5W-20
- Mopar OEM Synthetic Oil
Benefits of Synthetic Oil
- Improved MDS lifter protection
- Better high-temperature stability
- Reduced engine wear under towing
- Cleaner engine internals
- Improved fuel efficiency
- Longer oil life
Oil Change Interval
Oil change intervals depend on driving conditions and usage intensity.
2018 Ram 1500 Oil Change Cost
Oil change cost varies depending on service type, oil brand, and location.
- DIY Oil Change: $50 – $90
- Independent Workshop: $90 – $150
- Dealership Service: $150 – $230
Using OEM-spec synthetic oil is slightly more expensive but essential for protecting the HEMI engine and extending its lifespan.
Frequently Asked Questions
What oil does a 2018 Ram 1500 5.7 HEMI use?
It uses SAE 5W-20 full synthetic oil meeting Chrysler MS-6395 specification.
How much oil does the 5.7 HEMI take?
It takes approximately 7 quarts of engine oil with filter change.
Can I use 5W-30 instead of 5W-20?
5W-20 is the factory-recommended oil. Some users use 5W-30, but it is not officially recommended for MDS-equipped engines.
How often should oil be changed?
Every 6,000–8,000 miles under normal use, or sooner for heavy towing or severe driving conditions.
What happens if oil is not changed on time?
It can cause sludge buildup, MDS lifter issues, reduced performance, and long-term engine damage.
Final Thoughts
The 2018 Ram 1500 5.7 HEMI performs best when maintained with proper 5W-20 full synthetic oil and regular service intervals. Correct oil maintenance is essential to protect the MDS system and ensure long engine life under demanding conditions.