The 2018 Jeep Grand Cherokee oil capacity and type are critical pieces of information for any owner looking to maintain their vehicle’s performance and longevity. As a popular SUV renowned for its blend of luxury, capability, and power, ensuring the right lubrication is paramount to its robust engines. Knowing the specific requirements not only helps in routine maintenance but also in preserving the engine’s health, optimizing fuel efficiency, and upholding the manufacturer’s warranty.
The 2018 model year Grand Cherokee was offered with a diverse range of powerful engines, each with distinct oil specifications. From the efficient Pentastar V6 to the roaring HEMI V8s and the torquey EcoDiesel, understanding these nuances is key. Using the incorrect oil type or an improper amount can lead to decreased performance, premature wear, and potentially costly engine damage.
The Importance of Engine Oil in Your Grand Cherokee
Engine oil is the lifeblood of your vehicle. It performs several vital functions:
Lubrication: Reduces friction between moving parts, preventing wear and tear.
Cooling: Helps dissipate heat generated by combustion and friction.
Cleaning: Carries away contaminants like dirt, metal particles, and sludge to the oil filter.
Sealing: Fills microscopic gaps between engine components like piston rings and cylinder walls, improving compression.
Corrosion Prevention: Contains additives that protect metal surfaces from rust and corrosion.
Given the demanding conditions many Grand Cherokees operate under – from daily commutes to off-road adventures or towing – maintaining the correct oil specifications is non-negotiable.
Detailed Breakdown: 2018 Jeep Grand Cherokee Oil Capacity and Type by Engine
The 2018 Jeep Grand Cherokee offered several engine options, each with its own specific oil requirements. It’s crucial to identify which engine your vehicle has to ensure you use the correct oil. Always consult your owner’s manual for the most accurate and up-to-date information, as specifications can sometimes have minor revisions.
3.6L Pentastar V6 Engine
This popular engine is known for its balance of power and efficiency, found in many Jeep and Chrysler vehicles.
Oil Capacity: Approximately 6 US Quarts (5.7 Liters) with filter.
Recommended Oil Type: SAE 5W-20 Full Synthetic engine oil.
Specification: It must meet Chrysler Material Standard MS-6395. Look for this specification on the oil bottle label. Using oil that meets this standard ensures proper lubrication and protection for the engine’s advanced valvetrain system.
5.7L HEMI V8 Engine
The legendary HEMI provides robust power and towing capability.
Oil Capacity: Approximately 7 US Quarts (6.6 Liters) with filter.
Recommended Oil Type: SAE 5W-20 Full Synthetic engine oil.
Specification: Must meet Chrysler Material Standard MS-6395. The HEMI engines benefit greatly from the stability and protection offered by synthetic oil, especially given their performance characteristics and features like the Multi-Displacement System (MDS).
6.4L SRT HEMI V8 Engine (Grand Cherokee SRT)
For those seeking serious performance, the SRT model features a potent naturally aspirated HEMI.
Oil Capacity: Approximately 7 US Quarts (6.6 Liters) with filter.
Recommended Oil Type: SAE 0W-40 Full Synthetic engine oil.
Specification: Must meet Chrysler Material Standard MS-12633. The higher performance nature of the SRT engine necessitates a more robust oil with a different viscosity to handle increased temperatures and stresses.
6.2L Supercharged HEMI V8 Engine (Grand Cherokee Trackhawk)
The Trackhawk is the pinnacle of Grand Cherokee performance, featuring a supercharged HEMI engine.
Oil Capacity: Approximately 7 US Quarts (6.6 Liters) with filter.
Recommended Oil Type: SAE 0W-40 Full Synthetic engine oil.
Specification: Must meet Chrysler Material Standard MS-12633. The extreme demands placed on the Trackhawk’s engine by its supercharger and immense power output make using the exact specified oil critical for its survival and performance.
3.0L EcoDiesel V6 Engine
The EcoDiesel offers impressive torque and fuel efficiency, particularly for towing.
Oil Capacity: Approximately 10.5 US Quarts (9.9 Liters) with filter.
Recommended Oil Type: SAE 5W-30 Full Synthetic engine oil.
Specification: Must meet Chrysler Material Standard MS-11106. Diesel engines have different lubrication needs compared to gasoline engines, especially concerning soot control and protection for emission system components like the Diesel Particulate Filter (DPF). Using an oil specifically designed for diesel engines meeting this standard is non-negotiable.
Why Full Synthetic Oil?
For all 2018 Jeep Grand Cherokee engines, full synthetic oil is either recommended or required. Synthetic oils are engineered to provide superior performance and protection compared to conventional oils. They offer:
Better temperature stability: Perform well in extreme heat and cold.
Reduced engine wear: Superior lubrication properties.
Improved cleanliness: Better at resisting sludge and deposit formation.
Extended drain intervals: Though always adhere to manufacturer recommended intervals.
While synthetic oil might have a higher upfront cost, the long-term benefits in terms of engine protection, performance, and potentially longer service intervals often outweigh the difference.
Checking and Changing Your Oil
Regular oil checks and changes are vital.
Checking Oil: Check your oil level regularly (e.g., once a month) on a flat surface, with the engine warmed up and then turned off for a few minutes to allow oil to drain back into the pan. Use the dipstick to ensure the level is between the “MIN” and “MAX” marks.
Oil Change Intervals: Your 2018 Grand Cherokee likely has an Oil Change Indicator System that will alert you when service is due. However, generally, service intervals can range from 7,500 to 10,000 miles or 6-12 months, whichever comes first. Refer to your owner’s manual for precise recommendations, and adjust based on driving conditions (e.g., heavy towing, extreme temperatures, dusty environments may require more frequent changes).
Conclusion
Understanding the correct oil capacity and type for your 2018 Jeep Grand Cherokee is a fundamental aspect of responsible vehicle ownership. Whether you drive the versatile Pentastar V6, the powerful HEMI V8, or the efficient EcoDiesel, adhering to the manufacturer’s specifications for oil viscosity and Chrysler Material Standard (MS) number will ensure your Grand Cherokee continues to perform reliably and efficiently for years to come. Always use high-quality, specified full synthetic oil and follow recommended service intervals to protect your investment.
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Source:
2018 Jeep Grand Cherokee Owner’s Manual, available via Mopar.com or Jeep.com. (Always consult your specific vehicle’s owner’s manual for definitive requirements.)