The 6.4L HEMI V8 engine (also known as the 392 HEMI) is a high-performance naturally aspirated engine used in Dodge, Jeep, Chrysler, and RAM vehicles. It is known for its powerful output, strong torque, and long-lasting durability when properly maintained.
In this guide, you will learn everything about the 6.4 HEMI engine including oil type, oil capacity, oil change interval, maintenance cost, common issues, and reliability insights.
6.4 HEMI Engine Overview
The 6.4 HEMI (392 cubic inch) is part of Chrysler’s third-generation HEMI engine family. It is widely used in performance cars like the Dodge Charger and Challenger Scat Pack, as well as heavy-duty trucks like the RAM 2500 and Jeep SRT models.
It delivers between 410 to 485 horsepower depending on the application, making it one of the most powerful naturally aspirated V8 engines in its class.
6.4 HEMI Engine Oil Type
The recommended engine oil for the 6.4 HEMI is SAE 0W-40 full synthetic oil that meets Chrysler MS-12633 specification. In some heavy-duty applications, SAE 5W-40 may also be used.
This engine is highly sensitive to oil quality because it uses advanced systems like VVT and MDS, which depend on stable oil pressure.
6.4 HEMI Oil Capacity
Oil capacity varies slightly by vehicle, but most 6.4 HEMI engines require:
- 7 quarts (6.6 liters) with oil filter change
- Always check dipstick after filling to avoid overfilling
6.4 HEMI Oil Change Interval
To maintain performance and prevent engine wear, regular oil changes are critical.
Driving Condition | Oil Change Interval |
|---|---|
Normal Driving | 5,000 – 7,500 miles |
Heavy Load / Towing | 3,000 – 5,000 miles |
Performance / Aggressive Driving | 3,000 – 4,500 miles |
Severe Conditions | 4,000 miles or less |
6.4 HEMI Oil Change Cost
- DIY oil change: $50 – $90
- Independent workshop: $100 – $160
- Dealer service: $150 – $220
Cost depends on oil brand, filter quality (Mopar OEM recommended), and labor charges.
Best Oil Brands for 6.4 HEMI
- Pennzoil Ultra Platinum 0W-40
- Mobil 1 Supercar 0W-40
- Valvoline European Vehicle 0W-40
- Castrol EDGE 0W-40
- Amsoil Signature Series 0W-40
Common 6.4 HEMI Engine Problems
- HEMI tick (lifter noise)
- Oil consumption in high-mileage engines
- Valve lifter and camshaft wear
- Carbon buildup in intake valves
- Oil pressure sensitivity issues
Maintenance Tips for Long Engine Life
- Always use 0W-40 full synthetic oil
- Never extend oil change intervals too long
- Replace oil filter every oil change
- Avoid prolonged idling
- Monitor oil level frequently
- Use OEM or high-quality filters (Mopar recommended)
Frequently Asked Questions (FAQs)
What oil does a 6.4 HEMI take?
The 6.4 HEMI engine requires SAE 0W-40 full synthetic oil that meets MS-12633 specification.
How much oil does a 6.4 HEMI hold?
It holds approximately 7 quarts (6.6 liters) with an oil filter change.
Is the 6.4 HEMI engine reliable?
Yes, it is reliable when properly maintained with high-quality synthetic oil and regular service intervals.
What is the oil change interval for 6.4 HEMI?
Typically every 5,000–7,500 miles, or sooner under heavy use conditions.
Final Thoughts
The 6.4 HEMI engine is a powerful and durable V8 that delivers excellent performance when maintained correctly. Using 0W-40 full synthetic oil, following proper oil change intervals, and using OEM filters ensures long-term reliability and peak performance.