Every Jeep owner knows the heart of their off-road beast or daily driver is its engine. Keeping that engine running smoothly requires proper care, and few tasks are as fundamental as a regular oil change. But what’s the right amount? Understanding your 2018 Jeep Cherokee oil capacity and the specifics of its lubrication system is key to its longevity and performance.
Here at FatBoysOffroad, we’re all about empowering you to tackle your own maintenance with confidence. This comprehensive guide will walk you through everything from exact oil capacities for different engines to choosing the right oil, performing a DIY oil change, and troubleshooting common issues. We’ll even touch on why this seemingly simple task is even more critical when you push your Cherokee to its limits on the trail.
Get ready to grab your wrenches, because by the end of this, you’ll be an expert on your 2018 Jeep Cherokee’s oil needs.
Understanding Your 2018 Jeep Cherokee’s Engine and Oil Needs
Before you even think about cracking open a fresh bottle of motor oil, it’s crucial to know which engine powers your 2018 Jeep Cherokee. The Cherokee line in 2018 offered two primary engine options, each with distinct oil requirements.
These engines are designed with specific tolerances and operating temperatures. Using the correct oil type and viscosity ensures proper lubrication, reduces friction, and prevents premature wear on vital engine components. This is especially true for those of us who demand more from our vehicles, whether it’s towing, heavy hauling, or navigating challenging off-road terrain.
Identifying Your Engine Type
The 2018 Jeep Cherokee typically came with one of two engines:
- 2.4L Tigershark MultiAir I-4 Engine: This is the standard engine for many trims, known for its fuel efficiency.
- 3.2L Pentastar V6 Engine: Often found in higher trims or those equipped for greater towing capacity and performance.
You can usually find your engine type listed on your vehicle’s window sticker, owner’s manual, or by checking the VIN. If you’re unsure, a quick call to a Jeep dealership with your VIN can confirm it.
2018 Jeep Cherokee Oil Capacity by Engine Type: The Exact Numbers
Getting the oil level just right is paramount. Too little oil leads to insufficient lubrication and potential engine damage, especially under heavy loads. Too much oil can cause aeration, foaming, and increased pressure, which can also lead to seal damage and leaks. Knowing the precise 2018 Jeep Cherokee oil capacity for your specific engine is non-negotiable.
Always consult your owner’s manual for the most accurate and up-to-date information. Manufacturer specifications can sometimes have minor revisions, and your manual is the definitive source.
2.4L Tigershark MultiAir I-4 Engine Oil Capacity
For models equipped with the 2.4-liter four-cylinder engine, the recommended oil capacity is:
- 5.5 quarts (5.2 liters) with a new oil filter.
This engine typically calls for a specific synthetic blend or full synthetic oil to ensure optimal performance and protection. Using the correct viscosity is equally important.
3.2L Pentastar V6 Engine Oil Capacity
If your 2018 Cherokee boasts the more powerful 3.2-liter V6 Pentastar engine, its oil capacity is:
- 5.9 quarts (5.6 liters) with a new oil filter.
The Pentastar V6 is a robust engine, but like any powerplant, it thrives on proper lubrication. Adhering to this capacity ensures all critical components are adequately bathed in oil.
Remember, these capacities are for when you’re also replacing the oil filter, which you should do with every oil change. The filter itself holds a small amount of oil, so including it in the calculation is crucial.
Choosing the Right Engine Oil and Filter for Your Cherokee
Selecting the correct motor oil and filter is just as important as knowing the oil capacity. Not all oils are created equal, and your Cherokee’s engine demands specific formulations for peak performance and longevity.
Using the wrong oil can compromise lubrication, lead to increased engine wear, and potentially void your warranty. Don’t skimp on these vital components; they are the lifeblood of your engine.
Recommended Oil Viscosity and Type
Both 2018 Jeep Cherokee engines typically require different oil specifications:
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For the 2.4L Tigershark MultiAir I-4 Engine:
- Viscosity: 0W-20.
- Type: Full synthetic or synthetic blend, meeting API SN PLUS or later standards. Look for oils that are specifically certified to Chrysler’s MS-6395 specification.
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For the 3.2L Pentastar V6 Engine:
- Viscosity: 5W-20.
- Type: Full synthetic or synthetic blend, also meeting API SN PLUS or later standards and Chrysler’s MS-6395 specification.
Synthetic oils offer superior protection across a wider range of temperatures, better resistance to breakdown, and improved flow, which is excellent for cold starts and high-stress off-road situations.
Selecting the Right Oil Filter
Your oil filter is responsible for trapping contaminants before they circulate through your engine. A high-quality filter is essential.
- Mopar Filters: We generally recommend using genuine Mopar oil filters. They are designed specifically for your Jeep’s engine and meet strict quality standards.
- Aftermarket Options: If choosing an aftermarket filter, opt for reputable brands like Wix, Mann, or Fram (their higher-end lines). Ensure it’s the correct part number for your specific engine.
The 2.4L engine typically uses a spin-on filter, while the 3.2L Pentastar V6 uses a cartridge-style filter located on top of the engine, making it easier to access.
Step-by-Step: Performing an Oil Change on Your 2018 Jeep Cherokee
Changing your own oil is a satisfying and cost-effective maintenance task. It also allows you to inspect other undercarriage components. Always prioritize safety first.
This guide provides general steps. Refer to your owner’s manual for specific torque values and safety precautions.
Tools and Materials You’ll Need
- New motor oil (correct type and capacity)
- New oil filter
- Oil drain pan (large enough for the full capacity)
- Socket wrench and appropriate socket for the drain plug (usually 13mm or 1/2 inch)
- Oil filter wrench (for spin-on filters) or appropriate socket (for cartridge filters, usually 24mm or 15/16 inch)
- Torque wrench
- Funnel
- Jack and jack stands (or ramps)
- Wheel chocks
- Gloves and eye protection
- Shop rags or paper towels
- New drain plug washer/gasket (recommended)
Safety First: Preparing Your Vehicle
- Park on Level Ground: Ensure the vehicle is on a flat, stable surface.
- Engage Parking Brake: Always activate the parking brake.
- Chock Wheels: Place wheel chocks behind the rear wheels if lifting the front, or vice versa.
- Lift Vehicle (if needed): Use a hydraulic jack to lift the front of the vehicle, then immediately support it securely with jack stands. Never rely solely on the jack.
- Let Engine Cool Slightly: Warm oil drains better, but hot oil can cause severe burns. Let the engine run for a few minutes then sit for 15-20 minutes.
Draining the Old Oil
- Locate Drain Plug: Position your oil drain pan directly beneath the oil pan drain plug.
- Remove Drain Plug: Using your socket wrench, carefully loosen and remove the drain plug. Be prepared for the oil to come out quickly.
- Allow to Drain: Let the oil drain completely, which can take 10-15 minutes.
- Replace Drain Plug: Once drained, clean the drain plug and replace its washer. Reinstall the drain plug and tighten it to the manufacturer’s specified torque (consult your manual, typically around 20 ft-lbs). Do not overtighten, as this can strip the oil pan threads.
Replacing the Oil Filter
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Locate Oil Filter:
- 2.4L Engine: Spin-on filter usually accessible from underneath.
- 3.2L V6 Engine: Cartridge filter located on top of the engine, typically under a plastic cover.
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Remove Old Filter:
- Spin-on: Use an oil filter wrench to loosen, then unscrew by hand. Be ready for residual oil.
- Cartridge: Use the appropriate socket to unscrew the cap, then carefully pull out the old filter element.
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Prepare New Filter:
- Spin-on: Apply a thin film of new oil to the rubber gasket of the new filter.
- Cartridge: Ensure the new filter element is oriented correctly and replace the O-rings on the filter cap if provided with the new filter. Lubricate the O-rings with fresh oil.
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Install New Filter:
- Spin-on: Hand-tighten until snug, then turn an additional 3/4 to 1 full turn (or follow filter manufacturer’s instructions).
- Cartridge: Insert the new filter element and screw the cap back on, tightening to the specified torque.
Adding New Oil
- Lower Vehicle: Carefully lower your Cherokee off the jack stands.
- Add Oil: Remove the oil filler cap (usually marked “ENGINE OIL”) and place a funnel in the opening. Pour in the specified 2018 Jeep Cherokee oil capacity slowly.
- Check Level: After pouring, wait a few minutes for the oil to settle. Pull out the dipstick, wipe it clean, reinsert it fully, then pull it out again to check the level. It should be between the “MIN” and “MAX” marks.
- Start Engine: Start the engine and let it run for about a minute. Check for any leaks around the drain plug and oil filter. The oil pressure light should turn off.
- Re-check Level: Turn off the engine, wait 5-10 minutes for the oil to settle, then re-check the dipstick. Add more oil in small increments if needed until it reaches the full mark.
Proper disposal of used oil is crucial. Many auto parts stores and service stations accept used motor oil for recycling.
Common Mistakes and Troubleshooting During an Oil Change
Even seasoned DIYers can make mistakes. Knowing what to look for and how to fix it can save you a headache and potential engine damage.
Always double-check your work. A little extra time spent verifying can prevent major issues down the road, especially before a long trip or an off-road adventure.
Overfilling the Engine Oil
Problem: You added too much oil, and the dipstick shows a level significantly above the “MAX” mark.
Solution: Excessive oil can cause foaming, which reduces lubrication effectiveness. It can also lead to increased crankcase pressure and oil leaks. If severely overfilled, you’ll need to drain some oil. You can loosen the drain plug slightly to allow a small amount to escape into your drain pan, or use an oil extractor pump through the dipstick tube.
Underfilling the Engine Oil
Problem: The dipstick shows the oil level below the “MIN” mark after an oil change.
Solution: This is a critical issue. Insufficient oil leads to metal-on-metal contact and rapid engine wear. Add oil in small increments (quarter-quart at a time) and re-check the dipstick until the level is within the acceptable range.
Oil Leaks After the Change
Problem: You notice oil dripping from under the vehicle after starting the engine.
Solution:
- Drain Plug: Check if the drain plug is tight enough (to spec, not overtightened) and if the washer was replaced and properly seated.
- Oil Filter: For spin-on filters, ensure it’s tight enough (hand-tight plus 3/4-1 turn). For cartridge filters, ensure the cap is torqued correctly and the O-rings are properly seated and not pinched.
A small leak can quickly become a big problem, so address it immediately. Do not drive the vehicle if you suspect a significant leak.
Stripped Drain Plug or Oil Pan Threads
Problem: The drain plug won’t tighten, or it just spins freely.
Solution: This usually happens from overtightening. If the drain plug threads are stripped, you might be able to use an oversized drain plug. If the oil pan threads are stripped, it’s a more serious issue, potentially requiring a thread repair kit (like a Heli-Coil) or, in worst-case scenarios, oil pan replacement. Seek professional help for this if you’re not comfortable.
Why Proper Oil Capacity is Crucial for Off-Road Performance
For the FatBoysOffroad crew, proper engine maintenance isn’t just about daily driving – it’s about survival on the trail. The unique demands of off-roading put immense stress on your engine and its lubrication system.
Maintaining the correct 2018 Jeep Cherokee oil capacity is critical when tackling steep inclines, descents, and uneven terrain. These conditions can cause oil to slosh around in the oil pan, potentially leading to momentary oil starvation if the level isn’t correct. Off-road vehicles often operate at higher RPMs, under heavy loads, and in dusty, dirty environments, all of which accelerate oil breakdown and contamination.
Enhanced Engine Protection
Accurate oil levels ensure consistent oil pressure and flow to all moving parts, even when your Jeep is at extreme angles. This prevents wear on critical components like the crankshaft, camshafts, and piston rings.
Optimal Cooling
Engine oil also plays a vital role in cooling the engine. Correct oil capacity means more oil to absorb and dissipate heat, which is crucial when crawling at low speeds or working the engine hard up a mountain pass.
Preventing Sludge and Contamination
Off-road adventures expose your engine to more dust and dirt. A robust oil change schedule with the right oil capacity and a fresh filter helps flush out these contaminants, preventing sludge buildup and keeping your engine clean internally.
Always perform a thorough check of your oil level and look for leaks before and after any serious off-road excursion. It’s a small step that can save you from a major breakdown far from civilization.
Frequently Asked Questions About 2018 Jeep Cherokee Oil Capacity
What happens if I put too much oil in my 2018 Jeep Cherokee?
Overfilling can lead to several problems. The crankshaft can churn the excess oil into a froth, reducing its lubricating properties. This “aerated” oil can also increase pressure in the crankcase, potentially blowing out seals and causing leaks. In severe cases, it can damage catalytic converters.
How often should I change the oil in my 2018 Jeep Cherokee?
For most drivers, the manufacturer recommends an oil change every 10,000 miles or 12 months, whichever comes first, when using the specified synthetic or synthetic blend oil. However, if you frequently tow, drive in extreme temperatures, or engage in off-road activities, consider shorter intervals, perhaps every 5,000 to 7,500 miles, for optimal engine health.
Can I use conventional oil instead of synthetic in my 2018 Jeep Cherokee?
The 2018 Jeep Cherokee engines are designed for and recommend synthetic or synthetic blend oils that meet specific Chrysler (MS-6395) and API standards. Using conventional oil may not provide adequate protection, especially in extreme conditions, and could potentially lead to premature engine wear. It’s best to stick with the manufacturer’s recommendations.
What type of oil filter does the 2018 Jeep Cherokee use?
The 2.4L Tigershark engine uses a traditional spin-on oil filter. The 3.2L Pentastar V6 engine, however, uses a cartridge-style oil filter, which is located in a housing on top of the engine and requires replacing only the filter element itself.
Where can I find the exact oil specifications for my specific 2018 Jeep Cherokee model?
The most reliable source for your specific oil capacity, type, and filter information is always your vehicle’s owner’s manual. It will provide the exact details tailored to your Cherokee’s build. You can also consult a reputable Jeep dealership or Mopar service center.
Conclusion: Keep Your Cherokee Running Strong
Understanding your 2018 Jeep Cherokee oil capacity and performing regular, proper oil changes is one of the most impactful maintenance tasks you can do for your vehicle. It’s not just about keeping the engine running; it’s about ensuring its longevity, efficiency, and reliability, whether you’re commuting to work or tackling a challenging trail.
By following the steps outlined here, choosing the correct oil and filter, and paying attention to detail, you’ll save money, gain valuable mechanical skills, and have the peace of mind that your Cherokee is ready for whatever adventure comes next. Don’t underestimate the power of good maintenance!
Stay safe and keep those wheels turning!
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