Determining the exact oil requirements for a 2018 Dodge Journey is a critical step in preserving the longevity of its engine components. This mid-size crossover, equipped with either the 2.4L four-cylinder engine or the more robust 3.6L Pentastar V6, relies heavily on specific lubrication properties to manage its variable valve timing (VVT) and heat dissipation.

The standard engine oil for all 2018 Dodge Journey models is SAE 5W-20. Beyond just the viscosity, the oil must meet the FCA Material Standard MS-6395. Using oil that fails to meet this specific Chrysler/FCA certification can lead to sludge buildup and potential warranty complications.

Essential Oil Specifications for the 2018 Dodge Journey

Every vehicle has a set of non-negotiable parameters when it comes to fluids. For the 2018 Dodge Journey, these parameters are defined by the factory engineers to balance fuel efficiency with internal component protection.

Recommended Oil Viscosity

The primary recommendation for the 2018 model year is SAE 5W-20. This multi-grade oil is designed to provide rapid lubrication at low temperatures (the "5W" rating) while maintaining a consistent film strength at operating temperatures (the "20" rating). In colder climates, 5W-20 ensures that the oil reaches the upper valve train within seconds of a cold start, which is where the majority of engine wear occurs.

The Importance of FCA MS-6395

Many car owners make the mistake of choosing oil based solely on the viscosity on the bottle's front label. However, for a Dodge vehicle, the back label is equally important. The oil must explicitly state that it meets or exceeds FCA Material Standard MS-6395. This standard includes specific tests for oxidation resistance, wear protection, and compatibility with the seals used in the Pentastar and World Engine families. Oils like Pennzoil, Valvoline, and Mobil 1 often carry this certification, but always verify the specific product line.

Oil Capacity by Engine Type

The amount of oil required depends entirely on which engine is under the hood. Filling a 2018 Dodge Journey with too much or too little oil can result in catastrophic engine failure or decreased performance.

2.4L 4-Cylinder Engine (World Engine)

The 2.4L inline-four engine is the base powertrain for the CVP and SE Plus trims.

  • Total Capacity with Filter: 4.5 Quarts (4.3 Liters).
  • Refill Without Filter: Approximately 4.0 Quarts. Technicians generally recommend adding 4 quarts first, running the engine briefly, and then checking the dipstick to add the final half-quart. This prevents accidental overfilling due to residual oil left in the pan.

3.6L V6 Engine (Pentastar)

The 3.6L Pentastar V6 is found in the SXT, Crossroad, and GT trims. This engine features a more complex oiling system and a top-mounted cartridge filter.

  • Total Capacity with Filter: 5.9 Quarts (5.6 Liters).
  • Refill Without Filter: Approximately 5.4 Quarts. The 5.9-quart capacity is a specific figure often rounded to 6 quarts in many service shops, but precision is key to maintaining optimal oil pressure within the VVT system.

Why 5W-20 is the Mandatory Choice

There is often a debate among high-mileage vehicle owners about switching to a thicker oil, such as 5W-30 or 10W-30, to reduce engine noise or consumption. In the case of the 2018 Dodge Journey, sticking to 5W-20 is not just a suggestion; it is a mechanical necessity.

The Role of Variable Valve Timing (VVT)

Both engines in the 2018 Journey utilize a sophisticated VVT system that relies on oil pressure to actuate the camshaft phasers. These systems have incredibly tight tolerances. Oil that is too thick (higher viscosity) may move too slowly through the small oil galleries, causing the VVT system to lag. This often results in a "Check Engine" light with codes related to camshaft timing.

Fuel Economy and Emissions

The 5W-20 viscosity is also chosen to minimize "parasitic loss." Thinner oil offers less resistance to the moving parts of the engine, allowing the crankshaft to spin more freely. This contributes to the vehicle's fuel economy ratings and helps meet modern emissions standards. Switching to a thicker oil will almost certainly result in a measurable drop in MPG.

Choosing Between Synthetic and Conventional Oil

While the owner's manual may permit the use of "conventional" oil as long as it meets the MS-6395 standard, the consensus among automotive experts and long-term owners is to use Full Synthetic Oil.

Benefits of Full Synthetic in a Dodge Journey

  1. High-Temperature Stability: The 3.6L Pentastar engine can run quite hot, especially when the vehicle is fully loaded with seven passengers. Synthetic oil resists breaking down under high heat far better than conventional blends.
  2. Cleaner Internals: Synthetics are engineered to keep soot and carbon in suspension, preventing the "sludge" that historically plagued earlier Dodge engine designs.
  3. Extended Protection: If you frequently drive in stop-and-go city traffic or use your Journey for towing, synthetic oil provides a much stronger protective film on bearings and cylinder walls.

Practical Steps for a 2018 Dodge Journey Oil Change

Performing an oil change on a 2018 Dodge Journey is a straightforward task, but there are nuances depending on the engine. For those planning a DIY service, having the right tools and following a precise sequence ensures a clean and effective job.

Tools and Supplies Needed

  • For the 3.6L V6: A 24mm socket for the top-mounted oil filter cap.
  • For the 2.4L I4: A standard oil filter wrench for the bottom-mounted spin-on filter.
  • Wrench: 13mm socket or wrench for the oil pan drain plug.
  • Oil: 5 to 6 quarts of 5W-20 (MS-6395 compliant).
  • Filter: Mopar Part #68191349AC (for 3.6L) or Mopar Part #04884899AC (for 2.4L).

The Execution Process

  1. Warm Up the Engine: Run the vehicle for 5 minutes. Warm oil flows more freely and carries away more contaminants than cold, thick oil.
  2. Access the Drain Plug: On both engines, the drain plug is located at the rear of the oil pan. Use a 13mm wrench to remove it. Ensure you have a drain pan capable of holding at least 7 quarts to avoid spills.
  3. Address the Filter (V6 Specific): The 3.6L engine uses a cartridge filter located on top of the engine. Unscrew the cap using a 24mm socket. When you pull the old filter out, ensure the O-ring on the cap is replaced with the new one provided in the filter box. Lubricate the new O-ring with a dab of fresh oil.
  4. Address the Filter (4-Cylinder Specific): The 2.4L uses a traditional spin-on filter located on the bottom of the engine near the front. Ensure the old rubber gasket comes off with the filter; if it stays stuck to the engine block, the new filter will "double-gasket" and blow out under pressure.
  5. Refill and Check: Reinstall the drain plug with a new crush washer if possible. Pour in the recommended amount of oil. Start the engine and let it run for 30 seconds to circulate oil through the new filter. Turn it off, wait 5 minutes for the oil to settle in the pan, and check the dipstick.

Understanding the Oil Change Indicator System

The 2018 Dodge Journey is equipped with an "Oil Change Required" indicator system. This is not a simple mileage timer; it is a software-based monitor that analyzes engine temperature, driving habits, and idle time to calculate when the oil has likely degraded.

When to Change the Oil

  • Typical Conditions: The indicator usually triggers between 7,500 and 10,000 miles.
  • Severe Conditions: If you tow a trailer, drive in dusty environments, or experience extreme cold, the system may alert you as early as 3,500 miles. Dodge recommends that even if the light does not come on, the oil should be changed at least once every 12 months.

How to Reset the Indicator

After you or your mechanic changes the oil, the system must be manually reset:

  1. Turn the ignition to the "ON/RUN" position (do not start the engine).
  2. Fully depress the accelerator pedal slowly three times within 10 seconds.
  3. Turn the ignition to the "OFF/LOCK" position. If the "Oil Change Required" message appears the next time you start the car, the reset was unsuccessful and should be repeated.

Troubleshooting Common Oil Issues

Owners of the 2018 Dodge Journey occasionally report specific oil-related symptoms. Identifying these early can save thousands in repair costs.

The "Ticking" Sound in 3.6L Engines

A common complaint with the Pentastar V6 is a ticking sound coming from the top of the engine. While this is often related to rocker arm wear, using the wrong oil viscosity or low-quality oil can accelerate this issue. Ensuring the use of MS-6395 synthetic oil helps maintain the hydraulic lifters and reduces the friction that leads to this "Pentastar tick."

Oil Leaks Near the Filter Housing (V6)

The oil filter adapter housing on the 3.6L engine is made of plastic and sits in the "V" of the engine block. Over time, heat cycles can cause this housing or its seals to crack, leading to oil pooling on top of the transmission or leaking down the back of the engine. If you notice a drop in oil level but no visible leaks on the ground, inspect the valley of the engine.

Blue Smoke from the Exhaust

If you see blue smoke during a cold start or under heavy acceleration, it usually indicates oil is entering the combustion chamber. In the 2018 Journey, this is sometimes linked to a failing PCV (Positive Crankcase Ventilation) valve. Replacing the PCV valve is a cheap and effective first step before assuming more serious piston ring or valve seal issues.

Maintenance Summary for 2018 Dodge Journey Oil

Feature 2.4L I4 Engine 3.6L V6 Engine
Recommended Viscosity SAE 5W-20 SAE 5W-20
Capacity (with Filter) 4.5 Quarts (4.3L) 5.9 Quarts (5.6L)
Material Standard FCA MS-6395 FCA MS-6395
Filter Type Spin-on (Bottom) Cartridge (Top)
Drain Plug Torque 20 lb-ft (27 N·m) 20 lb-ft (27 N·m)
Typical Interval 7,500 - 10,000 Miles 7,500 - 10,000 Miles

Conclusion

The 2018 Dodge Journey is a reliable workhorse, but its health is tethered to the quality of its lubrication. Using SAE 5W-20 oil that meets the FCA MS-6395 standard is the most effective way to protect the engine's VVT system and ensure efficiency. Whether you drive the 2.4L four-cylinder or the 3.6L V6, maintaining the correct oil capacity—4.5 quarts and 5.9 quarts respectively—is vital. By opting for a high-quality full synthetic oil and adhering to the vehicle's oil change indicator system, you can keep your Journey running smoothly for years to come.

Frequently Asked Questions

Can I use 5W-30 instead of 5W-20 in my 2018 Dodge Journey?

Dodge explicitly recommends 5W-20 for the 2018 model year to ensure proper oil pressure for the VVT system and to optimize fuel economy. While 5W-30 might not cause immediate damage, it can lead to timing-related error codes and slightly higher fuel consumption. It is best to stick to the factory-specified viscosity.

What happens if I overfill the oil in my 3.6L V6 engine?

Overfilling can lead to a condition called "aeration" or foaming. The crankshaft can strike the excess oil, whipping it into a foam that contains air bubbles. Since air cannot lubricate or be pressurized like liquid oil, this can lead to oil starvation at the bearings, potential leaks from seals, and even engine damage. If you are significantly over the "Full" mark on the dipstick, drain the excess.

Does the 2018 Dodge Journey require synthetic oil?

While Dodge does not strictly mandate synthetic oil (they mandate the MS-6395 standard), most oils that meet this standard are synthetic or high-quality synthetic blends. For the best protection against heat and sludge, especially in the 3.6L engine, full synthetic is highly recommended.

How often should I check the oil level?

It is a good practice to check the oil level at every other fuel fill-up or at least once a month. Some engines, as they age, may consume a small amount of oil between changes. Catching a low oil level early prevents unnecessary wear on the internal components.

What is the best oil filter brand for a 2018 Dodge Journey?

Mopar filters are the original equipment manufacturer (OEM) choice and are guaranteed to fit and function perfectly. Other reputable brands include Wix, Bosch, and Mobil 1. For the 3.6L V6, ensure the filter includes a high-quality O-ring to prevent leaks at the cap.