Jeep 4.0L engine is reliable and strong. To keep it in fighting shape, Jeep owners need to maintain it regularly. Knowing about Jeep 4.0 oil capacity and using the right oil type is an important thing to remember when coming to do oil maintenance for your Jeep.
Generally, Jeep 4.0 engine requires 5.5 quarts of 10W-30 or 5W-30 oil, depending on weather conditions or your driving habits.
This article provides more knowledge of oil capacity and oil type for every Jeep 4.0L model. Also, you will gain significant insight into the best oil for your Jeep after 4 minutes of reading.
Let’s get started!
[1988 – 2006] Jeep 4.0L Oil Capacity
The 1988-1989 Jeep 4.0 engine can take an oil capacity of up to 5.5 quarts (5.2 litres) with a new filter.
The oil capacity of the 1990-2006 Jeep 4.0 engine can hold up to 6 quarts (5.7 litres) of oil. A filter change is also recommended.
Type your model year into the SEARCH BOX to know the capacity and oil type used for your Jeep. Note that the oil capacity mentioned is the capacity of the respective Jeep 4.0 engines with filter.
| Year | Make & Model | Engine | Oil Capacity (Quarts / Liters) | Oil Type | Recommendation |
|---|---|---|---|---|---|
| 1988 | Jeep Comanche | 4.0L 6-cyl Engine [M] | 5.5 quarts / 5.2 L | 5W30, 10W30 |  Castrol Edge SAE 5W30 |
| 1989 | Jeep Cherokee | 4.0L 6-cyl Engine [L] | 5.5 quarts / 5.2 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 1990 | Jeep Cherokee | 4.0L 6-cyl Engine [L] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 1991 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 1992 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 1993 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 1994 | Jeep Cherokee | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 1995 | Jeep Cherokee | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 1996 | Jeep Grand Cherokee | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 1997 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 1998 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 1999 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 2000 | Jeep Cherokee | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 2001 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 2002 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 2003 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 2004 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 2005 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
| 2006 | Jeep Wrangler | 4.0L 6-cyl Engine [S] | 6 quarts / 5.7 L | 5W30, 10W30 | Castrol Edge SAE 5W30 |
[1988 – 2006] Jeep 4.0L Oil Type
There are four types of motor oil types. The conventional motor oil, synthetic blend motor oil, full synthetic motor oil, and high-mileage motor oil. The jeep 4.0 engine is capable of using any of these oil types. Always consult your owner’s manual to determine the proper motor oil specification for your vehicle.
Viscosity Grade
For the jeep 4.0L engine, the manufacturer suggests using 10W-30 and 5W-30 viscosity depending on where you are living. These viscosities have been confirmed to function well by current and past jeep owners. You can look at the owner’s manual for your model to check whether it suggests both or only one.
API Quality Classification
Oils used for Jeep 4.0 should have API Service Certified. The API refers to the American Petroleum Institute. The API is the largest oil and gas industry trade organization. The institute certifies that motor oil meets specific Original Equipment Manufacturer (OEM) quality and performance standards.
Read more: Chevy Equinox Oil Type & Capacity [2004-2021]
Best Oil For Jeep 4.0 Engine
5W-30
By viscosity, the number 5 before the “W” represents the single-grade winter viscosity, while the number 30 after the “W” indicates the single-grade summer viscosity. In simpler terms, the “5W” ensures that the oil flows well in cold temperatures, while the “30” provides adequate protection and performance in warmer conditions. Therefore, engine oil with a viscosity of 5W-30 is ideal for vehicles operating in cold areas, ensuring smooth performance and engine protection in low temperatures.
Castrol Edge 5W-30 Advanced Full Synthetic
Genuine SAE 5W-30 Mopar Engine Oil
Mobil 1 High Mileage Full Synthetic 5W-30
Genuine SAE 5W-30 Mopar Engine Oil – OEM Chrysler Fluid
The SAE 5W-30 Mopar Engine oil is suited for all 5W-30 engines in all climates. It exceeds the requirements for API Certified SM engine oils. It is an ideal oil for gasoline, flexible fuel (E85), and turbocharged engines. The Genuine SAE 5W-30 Mopar oil is an OEM Chrysler fluid.
The fluid is specifically formulated to enhance fuel economy, provide superior oxidation protection, and minimize oil consumption. Moreover, it offers excellent high-temperature stability and low-temperature pumpability, ensuring reliable performance in a wide range of conditions. Additionally, this high-quality engine oil reduces piston deposits and promotes better engine cleanliness. As a result, it proves to be a versatile choice for maintaining optimal engine efficiency, especially for Chrysler, Dodge, and Jeep vehicles.
Genuine SAE 5W-30 Mopar Engine Oil
Pros
- Original Chrysler Fluid number 68218921AA
- Excellent temperature resistance
- Improves fuel economy
- Helps reduce piston deposits
- Enhance engine cleanness
Cons
- Difficult to find in stores
- High price
Castrol Edge 5W-30 Advanced Full Synthetic
Castrol Edge stands out as Castrol’s most advanced and strongest engine oil. This premium full synthetic fluid, built on innovative Fluid Titanium Technology, transforms under pressure to deliver exceptional performance. Furthermore, it meets the rigorous engine test requirements of Chrysler MS 6395. Designed to provide additional strength, this engine oil ensures your 4.0 engine performs at its peak, even under intense pressure.
The advanced fluid is specifically engineered with improved sludge protection, resulting in 10X better high-temperature performance. Additionally, Castrol Edge oil reduces contact between two metal surfaces, minimizing deposit formation for optimal engine response. Furthermore, it contains frictional additives that create a protective layer, offering superior wear and friction protection.
The product is ideal and reliable for heavy-duty vehicles. It works well with Chrysler, Dodge, and Jeep models.
Castrol Edge 5W-30 Advanced Full Synthetic
Pros
- Fluid Titanium Technology ensures maximum engine performance
- Lubricates and cleans the engine
- Reduces metal-to-metal
- Advanced wear protection
- Performs well under pressure
- Maximizes engine response
Cons
- Quite expensive
- Does not last for long
Mobil 1 High Mileage Full Synthetic Motor Oil 5W-30
Mobil 1 High Mileage 5W-30 is a fully synthetic fluid designed to prolong the life of high mileage cars. It comes with a seal conditioner that reduces oil leaks in higher mileage cars over 75,000 miles.
This high mileage oil is formulated to provide superb internal engine heat and low-temperature protection. You can use this oil for all types of modern vehicles, including high-performance turbo-charged, diesel multi-valve fuel injected engines, SUVs, light vans, and light trucks.
Mobil 1 high-mileage oil contains advanced cleaning agents that completely clean sludge buildup in the engine. It can protect the critical engine parts in higher mileage engines and has excellent oxidation protection to prevent oil breakdown.
Mobil 1 High Mileage Full Synthetic 5W-30
Pros
- Prevents oil leaks
- Outstanding oxidation protection
- Advanced engine cleaner
- Extends engine life
- Protects for up to 10,000 miles between oil changes
- Improves fuel economy
Cons
- Can make low mileage get worse
10W-30
Your Jeep 4.0 engine needs a specific type of oil to perform effectively during hot seasons. Specifically, 10W-30 oil is an excellent choice for these conditions. To clarify, the 10W-30 rating shows that the oil has a viscosity grade of 10 in winter or cold temperatures and 30 in summer or warm temperatures. In other words, the oil maintains a viscosity of 10W when the engine is cold and adjusts to a grade of 30 when the engine is hot. Therefore, 10W-30 oil works best in hot weather, ensuring optimal engine performance and protection.
Genuine SAE 10W-30 Mopar Engine Oil
Castrol 03081 Edge 10W-30 Advanced Full Synthetic
Valvoline High Mileage with MaxLife Technology 10W-30
Genuine SAE 10W-30 Mopar Engine Oil – OEM Chrysler Fluid
The Genuine SAE 10W-30 Mopar oil is an OEM Chrysler fluid. It is approved for all engines that use SAE 10W-30 engine oils and works well in all climates. The lubricant also helps increase fuel economy and piston deposits are easily reduced.
The fluid provides fantastic lubrication under high mechanical load, high heat conditions. The SAE 10W-30 Mopar oil works perfectly in gasoline, flexible fuel (E85), and pre-2004 turbocharged engines.
Genuine SAE 10W-30 Mopar Engine Oil
Pros
- OEM Chrysler fluid part number 68218930AA
- Excellent lubrication under high heat
- Helps increase fuel economy
Cons
- Not ideal for the post-2004 turbocharged engine
- Not usually available in stores
Valvoline High Mileage MaxLife SAE 10W-30
Valvoline High Mileage synthetic blend uses a proprietary MaxLife Technology to prolong the life of engines. The synthetic blend special formulation secures the engine against sludge and deposits.
This high mileage oil was specially designed to provide a superior layer of protection. This layer helps to prevent engine breakdown in your engine. The oil has the ability to restore old engine seals and withstand motor oil breakdown in extreme conditions.
If you are looking for a different type of protection for your engine, then the Valvoline High Mileage oil is your best bet. Not only does it provide maximum protection, but it is also specifically designed for engines with over 75,000 miles. Furthermore, if you own a high-mileage 4.0L Jeep engine, this oil is highly recommended for maintaining optimal performance and longevity.
Valvoline High Mileage with MaxLife Technology SAE 10W-30
Pros
- Max Life Technology ensures maximum protection
- Advanced cleaning prevents sludge and deposit
- Helps restore old engine
- High-temperature resistance
Cons
- Packaging is prone to damage
- High-performance vehicles may not get adequate lubrication
Castrol 03081 Edge 10W-30 Advanced Full Synthetic
Castrol 03081 Edge 10W-30 features a Fluid Titanium Technology which makes it perform significantly well even under pressure. This oil has a 42 percent better rating on fighting power-robbing deposits. It comes with excellent anti-wear protection and deposit control. This Castrol’s highest performance product satisfies Engine Test Requirements of Chrysler MS 6395
The Castrol Edge 10W-30 oil is a powerful oil used to reduce friction, and also help increase power and fuel economy. It is rich in antioxidants and has an outstanding oxidation resistance. Edge oil operates well under pressure and even in the highest stress conditions like towing, or high-performance driving.
Castrol 03081 Edge 10W-30 Advanced Full Synthetic
Pros
- Increases engine power
- Provides better high-temperature performance
- Helps improve fuel economy
- Properly cleans the engine
- Good anti-wear protection
- Outstanding oxidation resistance
Cons
- Not best for winter climates
- Doesn’t include active testing
Conclusion
It is critical to use high-quality and proper oil in your Jeep 4.0 engine to enhance performance, provide better protection, increase horsepower, and improve fuel efficiency. Moreover, using the wrong amount of oil can result in severe damage to the engine. Therefore, always ensure you follow the manufacturer’s recommendations to maintain optimal engine health.
By now now we hope that you know the drill. Identify your model. Pick the right product and get the maintenance done!
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