Keeping your 2018 Jeep Grand Cherokee running at peak performance requires more than just following a standard maintenance schedule; it demands the use of high-quality synthetic lubricants designed to withstand the rigors of modern driving. The 3.6L Pentastar V6 engine in this vehicle is renowned for its power, but like any complex internal combustion engine, it thrives on superior protection against wear, heat, and deposit formation. Whether you are navigating city traffic, tackling off-road trails, or towing heavy loads, the fluids you choose play a critical role in extending the lifespan of your powertrain and ensuring reliable starts in extreme temperatures.
Recommended AMSOIL Products
- AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil – The premier choice for maximum engine protection, offering superior resistance to horsepower loss and wear with extended drain intervals up to 25,000 miles.
- AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil – An excellent option for those seeking a balance of cleaning power and protection, providing up to 20,000 miles of guaranteed service.
- AMSOIL OE 0W-20 100% Synthetic Motor Oil – Formulated to outperform conventional oils while meeting original equipment specifications, effectively fighting sludge and deposits.
- AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil – Specifically engineered for engines with over 75,000 miles, featuring boosted detergents to clean and reduced sludge for longer engine life.
- AMSOIL Oil Filter – Provides superior filtration efficiency and higher capacity for contaminants compared to standard filters, ensuring the oil remains clean.
- WIX Oil Filter – A reliable OEM-equivalent option featuring premium media that offers improvements over standard manufacturer-branded filters.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A phosphate and silicate-free formulation that offers up to 150,000 miles or 5 years of protection for the cooling system.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated, eco-friendly option that offers extended service life for passenger cars and light trucks.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Designed to withstand heavy towing, elevated temperatures, and challenging terrain while maintaining fluidity in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective synthetic solution that protects against wear and promotes smooth, shudder-free shifts.
- AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube – Provides advanced protection for differentials and transfer cases, controlling thermal runaway and reducing operating temperatures.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS and traction-control responsiveness with a stable viscosity across a wide temperature range.
Ensuring Optimal Engine Performance
The heart of your 2018 Jeep Grand Cherokee, the 3.6L Pentastar V6, demands a fluid that can handle a wide variety of driving conditions. From the stress of towing up mountain passes to the stop-and-go nature of daily commutes, the engine operates under varying loads. Standard conventional oils may break down under these stresses, leading to increased wear and potential sludge buildup. AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil flows freely at cold start to minimize wear during the most critical moments. With a capacity of 5.9 quarts including the filter, it is essential to choose an oil that not only meets but exceeds the manufacturer’s specifications.
For owners of vehicles with over 75,000 miles, the AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil is an excellent choice. This specific product features a unique chemistry designed to condition seals, reduce oil consumption, and clean up existing sludge, helping the engine perform better and last longer. The AMSOIL Oil Filter (EA15K19-EA) complements this protection by filtering out 99 percent of contaminants at 20 microns, keeping the engine parts lubricated and reducing the risk of wear. If you prefer a filter option that is widely recognized for its reliability, the WIX Oil Filter (WL10010-EA) also offers premium media that surpasses many original equipment filters in terms of flow and particle capture.
Comprehensive Transmission and Drivetrain Care
The drivetrain of the Jeep Grand Cherokee is another critical area that benefits significantly from premium synthetic fluids. The 2018 model typically comes equipped with an 8-speed automatic transmission (models like the 845RE, 8HP45, or 850RE), which requires a fluid capable of handling high temperatures and heavy loads. Using a synthetic automatic transmission fluid like the AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid helps the transmission remain fluid even in sub-zero temperatures while providing reserve protection during heavy use. The AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is also highly effective, ensuring smooth shifts and protecting against the wear and sludge that can plague transmissions over time.
For models equipped with a transfer case or differentials, the choice of lubricant is equally vital. The transfer case often requires a fluid compatible with Mopar ATF+4 specifications, making the AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid or the AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid suitable choices. These fluids withstand the rigors of 4WD systems, providing protection against wear and ensuring reliable operation in extreme conditions. Furthermore, the front and rear differentials, which require synthetic GL-5 lubricants, should be serviced with AMSOIL AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube. This gear lube is formulated to control thermal runaway, a common issue in differentials under load, and contains friction modifiers specifically beneficial for limited-slip applications. Whether your vehicle has the 195FIA front diff, the 195RIA rear diff, or the 230RIA rear diff, this synthetic gear lube offers the necessary protection and longevity.
Cooling Systems and Fluid Safety
Maintaining the cooling system of your Jeep is essential for preventing overheating and ensuring the longevity of internal components. The 2018 Grand Cherokee requires approximately 10.5 quarts of coolant. For those looking for the best in corrosion protection and extended service life, the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is an ideal choice. This phosphate-, nitrate-, and silicate-free formula is safe for all cooling system metals and hoses, offering up to 150,000 miles of protection. Alternatively, the concentrated AMSOIL Propylene Glycol Antifreeze and Engine Coolant is an eco-friendly option that meets rigorous standards for metallic corrosion and erosion resistance, making it a robust solution for the cooling system.
Brake safety should never be compromised. The hydraulic brake fluid in your Jeep should be replaced with a high-quality synthetic option to ensure consistent performance. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid provides a stable viscosity over a wide temperature range, ensuring excellent responsiveness from your ABS and traction-control systems. This synthetic formulation helps prevent the fluid from boiling under heavy braking, maintaining safety and control in critical driving situations.
About the Vehicle
The 2018 Jeep Grand Cherokee represents a significant achievement in the mid-size luxury SUV segment, continuing a legacy that dates back to the late 1990s. Known for its blend of rugged off-road capability and refined on-road comfort, the Grand Cherokee has consistently ranked highly among consumers who need a versatile vehicle for both work and play. The 3.6-liter Pentastar V6 engine, introduced in 2012, has become the industry benchmark for reliability and efficiency in non-turbocharged V6 powerplants. This engine delivers ample torque for towing and hauling while maintaining respectable fuel economy, making it the most popular choice for owners of the 2018 model year.
When it comes to the driving character, the Grand Cherokee offers a smooth and composed ride, thanks in part to its available adaptive damping suspension systems. Owners appreciate the vehicle’s quiet cabin, which isolates passengers from road noise, and the spacious interior that accommodates up to five adults comfortably. The platform is known for its robust construction, which contributes to its reputation for durability and long-term value. However, like any complex vehicle with advanced electronics and a high-performance engine, it requires diligent maintenance to avoid common issues that can arise over time.
Owners of the 2018 Grand Cherokee should be aware of a few potential concerns that can be mitigated with the use of high-quality synthetic lubricants. One common issue is the accumulation of carbon deposits in the engine, particularly in the intake ports, which can lead to pre-ignition or “knock.” This is a known characteristic of Direct Injection (GDI) engines, including the 3.6L Pentastar. Regular use of AMSOIL P.i.® Performance Improver can help restore fuel injectors and control carbon buildup, maintaining engine efficiency and power. Another issue to monitor is oil consumption or sludge buildup in the valve train, which can be exacerbated by extended driving cycles or stop-and-go traffic. High-quality synthetic motor oils provide superior resistance to oxidation and thermal breakdown, keeping the valve train clean and reducing the risk of sludge formation. Additionally, the transfer case and differential seals can sometimes develop leaks due to heat and friction over time. Using synthetic gear lubes and ATF fluids helps condition seals and reduces the friction that leads to premature seal wear. Finally, brake fluid can absorb moisture over time, lowering its boiling point and potentially affecting ABS performance. Regular flushing with a high-quality synthetic brake fluid ensures that the braking system remains responsive and safe, even under the most demanding conditions.
In summary, the 2018 Jeep Grand Cherokee with the 3.6L V6 is a capable and beloved vehicle that rewards owners with its blend of utility and comfort. By adhering to a rigorous maintenance schedule and utilizing AMSOIL synthetic lubricants, owners can significantly extend the life of their vehicle, improve performance, and enjoy peace of mind on every journey. From the engine oil that protects the heart of the machine to the gear lube that ensures smooth power delivery, every fluid plays a crucial role in the overall health of your Grand Cherokee.