Hey there, fellow Jeep enthusiasts and DIYers! Ever felt that little twitch of anxiety when it’s time for an oil change, especially on a rig as capable as your 2020 Jeep Grand Cherokee? You’re not alone. Getting the right oil capacity and type is crucial for your engine’s longevity, whether you’re tackling daily commutes or hitting those demanding off-road trails.
Proper engine lubrication is the lifeblood of any vehicle, and for a powerful SUV like the Grand Cherokee, it’s non-negotiable. Using the correct oil volume ensures everything runs smoothly, prevents costly damage, and keeps your Jeep performing at its peak. Skimping on this vital maintenance or getting it wrong can lead to serious issues, from reduced fuel efficiency to premature engine wear.
In this comprehensive guide, we’re diving deep into everything you need to know about your 2020 Jeep Grand Cherokee oil capacity. We’ll cover specific capacities for each engine type, recommend the right oil viscosity, walk you through a professional DIY oil change, and share some pro tips to keep your WK2 running strong. By the end, you’ll be armed with the knowledge and confidence to handle your next oil service like a seasoned mechanic.
Let’s get that engine happy!
Understanding Your 2020 Jeep Grand Cherokee Oil Capacity by Engine Type
Knowing the precise oil capacity for your 2020 Grand Cherokee is the first and most critical step before any oil change. Jeep offered a range of powerful engines in 2020, and each has a specific requirement. Overfilling or underfilling can both lead to significant engine problems, so always double-check your owner’s manual and the information below.
This section details the specific 2020 Jeep Grand Cherokee oil capacity for the most common engine variants. We’ll also touch on the recommended oil filter type for each.
3.6L Pentastar V6 Oil Capacity
The 3.6L Pentastar V6 is a workhorse, known for its reliability and efficiency. It’s a popular choice for many Grand Cherokee owners.
- Oil Capacity: 6.0 quarts (5.7 liters)
- Recommended Oil Type: 5W-20 full synthetic engine oil
- Oil Filter: Cartridge type (e.g., Mopar 68191349AA or equivalent)
This engine utilizes a cartridge-style oil filter, which is housed in a cap on top of the engine, making it relatively easy to access during an oil change.
5.7L HEMI V8 Oil Capacity
For those who crave more power, the 5.7L HEMI V8 delivers robust performance. This engine requires a slightly different oil specification.
- Oil Capacity: 7.0 quarts (6.6 liters)
- Recommended Oil Type: 5W-20 full synthetic engine oil (ensure it meets Chrysler MS-6395 specification)
- Oil Filter: Spin-on canister type (e.g., Mopar 04892339AB or equivalent)
The HEMI uses a traditional spin-on canister filter, typically located on the side of the engine block. Always ensure the new filter gasket is properly seated before tightening.
6.4L SRT HEMI V8 Oil Capacity
The 6.4L SRT HEMI V8 is built for performance, found in the Grand Cherokee SRT models. Its higher output demands specific lubrication.
- Oil Capacity: 7.0 quarts (6.6 liters)
- Recommended Oil Type: 0W-40 full synthetic engine oil (ensure it meets Chrysler MS-12633 specification)
- Oil Filter: Spin-on canister type (e.g., Mopar 04892339AB or equivalent)
Due to the high-performance nature of the SRT engine, using the exact specified oil weight and type is paramount for optimal performance and protection.
6.2L Supercharged Trackhawk V8 Oil Capacity
The beastly 6.2L Supercharged Trackhawk V8 is in a league of its own, requiring premium lubrication for its extreme power output.
- Oil Capacity: 7.0 quarts (6.6 liters)
- Recommended Oil Type: 0W-40 full synthetic engine oil (ensure it meets Chrysler MS-12633 specification)
- Oil Filter: Spin-on canister type (e.g., Mopar 04892339AB or equivalent)
Trackhawk owners should be particularly diligent about using the correct oil and maintaining strict change intervals. This engine runs hotter and under more stress than standard V8s.
3.0L EcoDiesel V6 Oil Capacity
For those who chose the efficient and torque-rich 3.0L EcoDiesel V6, your oil requirements are distinct from the gasoline engines.
- Oil Capacity: 8.5 quarts (8.0 liters)
- Recommended Oil Type: 5W-30 full synthetic low-ash diesel engine oil (ensure it meets Chrysler MS-11106 specification, typically API CJ-4 or better)
- Oil Filter: Cartridge type (e.g., Mopar 68223044AA or equivalent)
Diesel engines have different additive packages and soot-handling requirements. Using gasoline engine oil in an EcoDiesel can cause severe damage to emissions systems like the Diesel Particulate Filter (DPF).
Why Proper Oil Capacity Matters for Your Grand Cherokee
Getting the oil capacity just right isn’t just a recommendation; it’s a critical factor for your engine’s health. Both underfilling and overfilling can lead to significant issues, impacting performance and potentially causing expensive repairs.
Let’s break down why paying attention to your Grand Cherokee’s oil capacity is so important.
The Dangers of Underfilling
Running your engine with too little oil is a recipe for disaster. Oil is responsible for lubricating moving parts, dissipating heat, and cleaning internal components.
- Insufficient Lubrication: Critical engine parts, like crankshaft bearings and camshafts, won’t receive enough lubrication. This leads to increased friction and rapid wear.
- Overheating: Oil helps carry heat away from the engine. Less oil means less heat dissipation, which can cause components to overheat and warp.
- Engine Damage: Prolonged underfilling can lead to irreversible engine damage, including seized bearings or a complete engine failure. This is especially true for off-roaders who might experience sustained high RPMs or extreme angles.
Always check your oil level regularly, especially before long trips or after demanding off-road excursions.
The Risks of Overfilling
While it might seem counterintuitive, too much oil can be just as damaging as too little. Overfilling introduces several problems that can compromise engine performance and longevity.
- Aeration (Foaming): Excess oil can be whipped into a froth by the crankshaft, creating air bubbles. This aerated oil doesn’t lubricate effectively, leading to metal-on-metal contact.
- Increased Pressure: Too much oil can create excessive pressure within the crankcase, potentially blowing out seals and gaskets, leading to oil leaks.
- Catalytic Converter Damage: If seals fail due to overpressure, oil can get into the combustion chamber and burn. This can foul spark plugs and damage the catalytic converter, a very expensive repair.
- Reduced Fuel Economy: The engine has to work harder to spin the crankshaft through excess oil, leading to decreased fuel efficiency.
When refilling, always add a little less than the specified amount, then check the dipstick and top up slowly until you reach the “full” mark. Patience here pays off.
Choosing the Right Engine Oil for Your 2020 Grand Cherokee
Beyond knowing your 2020 Jeep Grand Cherokee oil capacity, selecting the correct type and specification of engine oil is paramount. Not all oils are created equal, and your Jeep’s engine is engineered to perform best with specific formulations.
Let’s explore the key factors in choosing the right lubricant.
Decoding Oil Viscosity: 5W-20, 0W-40, and More
Oil viscosity refers to its resistance to flow. The numbers on an oil bottle, like “5W-20,” tell you two things:
- The “W” (Winter) Number: This indicates the oil’s viscosity at cold temperatures. A lower number (e.g., 0W, 5W) means the oil flows more easily when cold, providing better protection during startup.
- The Second Number: This indicates the oil’s viscosity at normal operating temperatures (typically 100°C). A higher number (e.g., 20, 30, 40) means the oil maintains a thicker film at hot temperatures, which is important for engine protection under load.
For most 2020 Grand Cherokees (3.6L Pentastar V6, 5.7L HEMI V8), 5W-20 full synthetic is the recommended viscosity. High-performance models (6.4L SRT, 6.2L Trackhawk) require 0W-40 full synthetic. The EcoDiesel needs 5W-30 low-ash synthetic diesel oil.
Always adhere to the viscosity recommended in your owner’s manual to ensure optimal performance and engine longevity.
Synthetic vs. Conventional: What’s Best for Your Jeep?
The debate between synthetic and conventional oil has been ongoing, but for modern vehicles like the 2020 Grand Cherokee, the answer is often clear.
- Conventional Oil: Derived directly from crude oil, it’s less refined and generally less expensive. It provides adequate lubrication for older engines or those with less demanding requirements.
- Full Synthetic Oil: Chemically engineered to have more uniform molecules, synthetic oil offers superior lubrication, better resistance to thermal breakdown, and improved flow in extreme temperatures. It also contains advanced additives for cleaning and protection.
For all 2020 Grand Cherokee engines, full synthetic oil is recommended and often required. Its superior properties are essential for protecting modern, high-performance engines, extending oil change intervals, and maintaining fuel efficiency. While synthetic oil costs more upfront, it’s a wise investment in your engine’s health, especially if you engage in towing or off-roading.
API Certifications and Mopar Standards
Beyond viscosity and synthetic composition, look for specific certifications and standards on the oil bottle. These ensure the oil meets stringent quality and performance requirements.
- API Certification: Look for the “starburst” symbol from the American Petroleum Institute (API) on gasoline engine oils, indicating it meets current engine protection standards (e.g., API SN Plus, SP). For diesel, look for CJ-4 or CK-4.
- Chrysler/Mopar Specifications: Modern Jeep engines often require oil that meets specific Chrysler/Mopar material standards. For example, gasoline engines typically require oil meeting MS-6395, while SRT/Trackhawk engines need MS-12633, and the EcoDiesel requires MS-11106. These specifications ensure the oil contains the correct additive package for your engine’s unique design.
Always verify these specifications in your owner’s manual. Using oil that doesn’t meet these standards can void your warranty and potentially harm your engine over time.
Gathering Your Tools and Supplies for a DIY Oil Change
Ready to tackle your 2020 Grand Cherokee oil change yourself? Excellent! Having the right tools and supplies on hand makes the job smoother, safer, and ensures you don’t get stuck halfway through. Planning ahead is key to a successful DIY project.
Here’s a checklist of what you’ll need.
Essential Tools for the Job
Gather these items before you even start thinking about draining oil:
- Socket Wrench Set: You’ll need the correct size socket for your drain plug (often 13mm, 15mm, or 17mm, depending on engine and aftermarket pans).
- Oil Filter Wrench: Essential for removing the old filter. Cartridge filters (Pentastar, EcoDiesel) need a specific cap wrench (often 24mm or 27mm socket), while spin-on filters (HEMI) might use a band-style or cap-style wrench.
- Torque Wrench: Crucial for tightening the drain plug and oil filter housing to the manufacturer’s specifications. This prevents leaks and damage.
- Jack and Jack Stands: Absolutely mandatory for safely lifting your vehicle. Never work under a vehicle supported only by a jack.
- Wheel Chocks: To prevent the vehicle from rolling.
- Drain Pan: Large enough to hold your entire 2020 Jeep Grand Cherokee oil capacity plus a little extra (8-10 quart capacity minimum is a good idea).
- Funnel: To neatly pour new oil into the engine.
- Gloves: Protect your hands from hot oil and chemicals.
- Rags or Shop Towels: For inevitable spills and clean-up.
- Flashlight or Headlamp: Helpful for seeing under the vehicle.
Having these tools ready will save you time and frustration during the process.
Quality Oil Filters: Don’t Skimp!
Your oil filter is just as important as the oil itself. A cheap, low-quality filter can fail prematurely, leading to contaminated oil and engine wear.
- Mopar OEM Filter: Using a genuine Mopar filter (e.g., 68191349AA for 3.6L, 04892339AB for HEMI, 68223044AA for EcoDiesel) ensures perfect fitment and adherence to factory specifications.
- Premium Aftermarket Filters: If you opt for an aftermarket brand, choose reputable ones like Wix, PurolatorONE, Mobil 1, or K&N. Ensure they meet or exceed OEM specifications.
Always replace the oil filter with every oil change. It’s a small cost for significant engine protection.
Disposing of Used Oil Responsibly
Used engine oil is a hazardous waste and must be disposed of properly. Never pour it down the drain or into the ground.
- Recycle: Most auto parts stores (e.g., AutoZone, O’Reilly Auto Parts) accept used motor oil for recycling free of charge. Some municipal waste facilities also have drop-off points.
- Store Safely: Pour the used oil from your drain pan into empty oil bottles or a sealed container. Label it clearly.
- Used Filter: Allow the old oil filter to drain for a while, then place it in a sealed plastic bag before disposal, often accepted at the same recycling centers.
Being a responsible DIYer includes proper waste disposal. Protect our environment!
Step-by-Step Guide: Performing a 2020 Jeep Grand Cherokee Oil Change
Performing an oil change on your 2020 Grand Cherokee is a rewarding DIY task that can save you money and give you a deeper understanding of your vehicle. Follow these steps carefully, prioritizing safety above all else.
Safety First: Pre-Service Checks
Before you even think about crawling under your Jeep, ensure your safety:
- Warm Up Engine: Drive your Jeep for 5-10 minutes to warm the oil slightly. Warm oil flows better, allowing for a more complete drain.
- Park on Level Ground: Ensure your vehicle is on a flat, stable surface.
- Engage Parking Brake: Always activate your parking brake firmly.
- Chock Wheels: Place wheel chocks behind the rear wheels (if lifting the front) or vice versa.
- Lift Vehicle Safely: Use a floor jack to lift the front of your Grand Cherokee at the designated jack points.
- Secure with Jack Stands: Lower the vehicle onto sturdy jack stands placed under the frame rails or designated support points. Give the vehicle a gentle shake to ensure it’s stable. Never work under a vehicle supported only by a jack.
- Open Hood: Open the hood and locate the oil fill cap. Loosening it slightly can help the oil drain faster.
Your safety is paramount. Do not proceed until the vehicle is securely supported.
Draining the Old Oil
Now that your Jeep is safely elevated, it’s time to get that old, dirty oil out.
- Locate Drain Plug: Position your large drain pan directly underneath the oil drain plug, typically at the lowest point of the oil pan.
- Remove Drain Plug: Using the correct size socket wrench, carefully loosen and remove the drain plug. Be prepared for hot oil to come out immediately.
- Allow to Drain Completely: Let the oil drain for at least 15-20 minutes, or until it’s reduced to a slow drip. This ensures you get as much old oil out as possible.
- Inspect Drain Plug: Check the drain plug and its gasket or O-ring. If the gasket is crushed or damaged, replace it to prevent leaks. Many new oil filters come with a replacement drain plug gasket.
- Reinstall Drain Plug: Once drained, clean the drain plug and the area around the oil pan. Reinstall the drain plug and tighten it to the manufacturer’s torque specifications using your torque wrench (consult your owner’s manual, usually around 20-25 ft-lbs). Do not overtighten, as this can strip the threads!
A clean, tight drain plug is essential to prevent leaks.
Replacing the Oil Filter
While the oil is draining or after the plug is reinstalled, you can tackle the oil filter.
- Locate Oil Filter: Depending on your engine, it will either be a spin-on canister filter (HEMI) or a cartridge filter housing (Pentastar, EcoDiesel).
- Position Catch Pan: Place a smaller catch pan or some rags underneath the filter area, as some oil will spill.
-
Remove Old Filter:
- Spin-on: Use your oil filter wrench to loosen the filter. Once loose, carefully unscrew it by hand.
- Cartridge: Use the appropriate socket to unscrew the plastic housing cap. The filter element will typically come out with the cap.
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Prepare New Filter:
- Spin-on: Apply a thin film of new engine oil to the rubber gasket of the new filter. This helps ensure a good seal. You can also pre-fill the filter with new oil to reduce startup dry time, but be careful not to spill.
- Cartridge: Remove the old filter element and replace the O-rings on the housing cap (new O-rings usually come with the new filter). Insert the new cartridge filter into the housing.
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Install New Filter:
- Spin-on: Screw the new filter on by hand until the gasket makes contact with the engine. Then, tighten an additional 3/4 to 1 full turn (or according to filter instructions). Do not overtighten with a wrench.
- Cartridge: Screw the housing cap back into place and tighten it to the manufacturer’s torque specification with your torque wrench.
A properly installed filter prevents leaks and ensures clean oil circulation.
Refilling with Fresh Oil
With the drain plug secure and a new filter installed, it’s time for the fresh stuff.
- Lower Vehicle: Carefully raise your Jeep slightly with the jack, remove the jack stands, and lower the vehicle back to the ground. It’s crucial to check the oil level on level ground.
- Add New Oil: Place a clean funnel into the oil fill opening on your engine. Slowly pour in approximately 1 quart less than your engine’s specified 2020 Jeep Grand Cherokee oil capacity.
- Check Dipstick: Wait a few minutes for the oil to settle. Remove the dipstick, wipe it clean, reinsert it fully, and then remove it again to check the level.
- Top Off Gradually: Add small amounts of oil (e.g., 1/2 quart at a time), rechecking the dipstick each time, until the oil level reaches the “full” mark. Do not overfill.
- Replace Oil Cap: Securely replace the oil fill cap.
Take your time with this step to avoid overfilling.
Final Checks and Resetting the Oil Life Monitor
You’re almost done! A few final steps will ensure everything is perfect.
- Start Engine: Start your Jeep’s engine. The oil pressure warning light should go out within a few seconds.
- Check for Leaks: While the engine is running, look underneath the vehicle for any signs of oil leaks around the drain plug or oil filter. If you see a leak, shut off the engine and investigate.
- Shut Off Engine: Let the engine run for a minute or two, then shut it off. Wait another 5-10 minutes for the oil to settle.
- Final Dipstick Check: Recheck the oil level one last time on the dipstick. Adjust if necessary.
- Reset Oil Life Monitor: Your Grand Cherokee has an oil life monitoring system. Consult your owner’s manual for the exact procedure, but it typically involves cycling the ignition and pressing the accelerator pedal a few times. This resets the “Change Oil” light.
Congratulations, you’ve successfully changed your oil! Keep a close eye on your oil level and for any leaks over the next few days.
Common Oil Change Questions and Troubleshooting
Even seasoned DIYers can run into questions or minor snags during an oil change. Here are some common queries and quick troubleshooting tips to keep your 2020 Grand Cherokee running smoothly.
“My ‘Change Oil’ Light Won’t Reset!”
This is a common frustration. If you’ve followed the steps in your owner’s manual and the light persists, try these:
- Double-Check Steps: Ensure you’re performing the reset procedure exactly as described. Sometimes the timing of pedal presses or ignition cycles is critical.
- Ignition On, Engine Off: Most resets require the ignition to be “on” (run position) but the engine not running.
- Number of Pedal Presses: The 2020 Grand Cherokee (WK2) typically requires three full accelerator pedal presses within 10 seconds.
- Seek Professional Help: If all else fails, a scan tool at a dealership or independent shop can force the reset.
It’s important to reset this light so the system can accurately track your next oil change interval.
“I Think I Overfilled/Underfilled the Oil!”
Don’t panic, but address this immediately:
- Overfilled: If it’s only slightly over (e.g., 1/4 inch above full on the dipstick), it might be okay. If significantly over, you’ll need to drain some out. You can carefully loosen the drain plug a tiny bit to let some oil trickle out, or use an oil extractor pump through the dipstick tube.
- Underfilled: If the level is below the “add” mark, add oil immediately. Driving with severely low oil can cause rapid engine damage.
Always err on the side of slightly underfilling and topping up, rather than overfilling.
“Why Am I Seeing a Small Oil Leak?”
Leaks after an oil change are usually due to a few common culprits:
- Drain Plug: The drain plug might not be tightened to spec, or its gasket/O-ring is damaged or missing. Always replace the gasket if it looks compromised.
- Oil Filter: The new oil filter might not be tight enough, or the old gasket from the previous filter is still stuck on the engine block, creating a double-gasket situation. Always ensure the mounting surface is clean before installing a new filter.
- Oil Fill Cap: Ensure the oil fill cap is securely tightened after refilling.
Address any leaks promptly to prevent further oil loss and potential engine damage.
Extending Engine Life: Pro Tips for Jeep Owners
Your 2020 Grand Cherokee is a capable machine, and with a little extra care, you can ensure its engine lasts for many years and countless adventures. Beyond understanding your 2020 Jeep Grand Cherokee oil capacity, these pro tips will help you maximize engine health and performance.
Adhere to Recommended Oil Change Intervals
While your oil life monitor is a good guide, don’t blindly follow it if your driving conditions are severe. For most 2020 Grand Cherokees, the recommended interval is typically 10,000 miles or 12 months, whichever comes first, when using synthetic oil.
- Severe Duty: If you frequently tow, off-road, drive in extreme temperatures, or make many short
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