The 2018 Grand Cherokee offers a refined blend of comfort, technology, and capability that many midsize luxury SUVs still struggle to match. Owners and shoppers often focus on the powertrain lineup and available oil filter housing materials when evaluating long term reliability and maintenance needs.
Below you will find a detailed overview of the 2018 Grand Cherokee, with key specifications, trims, and oil related maintenance guidance presented in a scannable format.
| Trim Level | Key Engine Option | Drivetrain | Notable Oil System Feature |
|---|---|---|---|
| Laredo | 3.6 L Pentastar V6 | Front-Wheel Drive | Standard full synthetic oil fill, long life oil system |
| Limited | 3.6 L Pentastar V6 or 5.7 L HEMI V8 | Selec-Terrain Traction Management | Enhanced oil cooler on V8 models, extended oil change intervals |
| Overland | 5.7 L HEMI V8 or 6.4 L HEMI V8 | Quadra-Drive II AWD | High capacity oil filter, upgraded oil pump for towing |
| Summit | 6.4 L HEMI V8 | Quadra-Drive II AWD | Performance-tuned oil system, premium synthetic fill |
2018 Grand Cherokee Powertrain Lineup and Oil Compatibility
Gas and Mild Hybrid Options
The 2018 Grand Cherokee primarily uses refined gasoline powered engines rather than a hybrid powertrain for this model year. The base trim typically pairs the 3.6 L Pentastar V6 with a responsive eight speed automatic transmission that delivers smooth power delivery and decent fuel efficiency for daily driving. Above that, the 5.7 L HEMI V8 and available 6.4 L HEMI V8 provide robust towing capacity and confident highway passing. For buyers interested in electrification, later model years introduced a mild hybrid system, but the 2018 Grand Cherokee relies on conventional engine oil with synthetic blend or full synthetic recommendations depending on powertrain choice.
Synthetic Oil and Extended Change Intervals
J.D. Power and real world owner feedback highlight that using the correct oil viscosity and type is essential for maintaining the precision valvetrain and turbocharging components if equipped. Most 2018 models call for full synthetic 5W-30 or 5W-20 oil, which helps protect components between scheduled service visits. The long life oil system on many trims supports extended intervals, provided the proper oil filter and capacity are used. This approach reduces long term ownership costs while keeping warranty compliance intact for certified ownership.
Fuel Economy, Efficiency, and Real World MPG
EPA Estimates and Driving Dynamics
Fuel efficiency varies across the 2018 Grand Cherokee lineup, with the efficient 3.6 L Pentastar V6 achieving competitive city and highway MPG for its class. The available 5.7 L and 6.4 L HEMI V8 models trade higher fuel consumption for exceptional low end torque and confident trailer towing. AWD systems, while adding capability, can reduce average MPG compared to front-wheel drive variants. Buyers balancing daily drivability and spirited weekends often accept these tradeoffs for the brand renowned ride comfort and refined interior.
Pricing, Value, and Long Term Cost of Ownership
Depreciation, Reliability, and Maintenance Planning
Analysis from sources such as J.D. Power and Kelley Blue Book indicates that the 2018 Grand Cherokee holds its value better than many competitors in the midsize luxury segment. Routine services, including oil changes, filter replacements, and inspections, contribute to sustained reliability. Choosing OEM recommended oil capacities and high quality filters minimizes the risk of leaks and extends engine life. When shopping used, checking service records for oil type and change intervals offers insight into how previous owners maintained the powertrain.
Reliability, Maintenance Logs, and What to Check
Inspecting Oil Service History and Components
For those considering a 2018 Grand Cherokee, reviewing maintenance logs is crucial to confirm consistent oil service. Look for records that specify the correct oil viscosity, capacity, and filter part numbers aligned with the factory fill specifications. Pay attention to signs such as oil leaks around the oil filter housing or signs of infrequent oil changes, which can lead to increased wear. A well documented service history typically correlates with smoother acceleration, quieter cabin noise, and fewer unexpected repairs.
Key Takeaways for 2018 Grand Cherokee Ownership
- Use factory recommended oil type and viscosity for your engine and climate
- Follow extended oil change intervals only when using full synthetic oil and approved filters
- Check oil level regularly and watch for leaks after oil filter replacements
- Review service records when buying a used 2018 Grand Cherokee
- Consider the balance between upfront fuel costs and long term reliability when choosing trim and engine options
FAQ
Reader questions
What oil type does a 2018 Grand Cherokee need for optimal performance?
Most 2018 Grand Cherokee trims perform best with full synthetic 5W-30 or as recommended by the owner manual for the specific engine and climate. Using the correct viscosity and a high quality oil filter supports the long life oil system and helps maintain the warranty compliant service schedule.
Can I use synthetic blend oil instead of full synthetic in my 2018 Grand Cherokee?
Yes, synthetic blend oil is acceptable for many trims, especially for budget conscious buyers who still want better protection than conventional mineral oil. However, if your vehicle uses an extended interval oil system or a turbocharged engine, full synthetic is typically recommended to ensure consistent performance and durability.
How often should I change the oil in my 2018 Grand Cherokee with the 5.7 HEMI V8?
Owners of the 5.7 HEMI V8 should follow the factory recommended intervals, which often allow for extended oil change intervals when using full synthetic oil. Regular checks of oil level and condition, combined with timely filter replacements, help protect the larger displacement engine and support consistent towing capability.
What signs indicate my oil system needs attention in a 2018 Grand Cherokee?
Watch for dashboard oil pressure warnings, unusual engine noise, or visible oil leaks around the oil filter housing. If you notice a burning oil smell, reduced fuel efficiency, or a significant drop in oil level between services, schedule an inspection promptly to avoid potential engine damage.