1998 Jeep XJ Engine Oil Capacity

The 1998 Jeep XJ’s engine oil capacity is 6 quarts. For more information, refer to this guide to Jeep XJ oil changes.
Written by Rachel Rigolino
Reviewed by Melanie Reiff
Manufactured between 1984 and 2001, the Jeep Cherokee XJ revolutionized the 4x4 market and set the standard for the entire SUV class we know today. In 1998, the XJ came with a 2.5L or 4.0L engine. A 1998 Jeep XJ’s engine oil capacity is 6 quarts. 
In the proud tradition of Jeep owners, XJ enthusiasts pride themselves on keeping their vehicles on the road for as long as they can. Reliable and tough, Jeeps require little pampering. However, routine oil changes are a must, particularly if you have a Jeep XJ with 75,000+ miles on the odometer.
If you’re researching your 1998 Jeep XJ oil capacity, you’ve found the right site. In this
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1998 Jeep XJ engine oil capacity. 

The 1998 Jeep XJ oil capacity is 6 quarts of 10W-30 motor oil
Because motor oil is sold around the world, many manufacturers sell their oil in liters instead of quarts. But no worries—just know that a liter is slightly more than a quart.

What kind of oil does a 1998 Jeep XJ need?

The 1998 XJ requires a 10W-30oil that is American Petroleum Institute (API) certified. Most people will also recommend that you use full synthetic oil as well.
What’s the difference between conventional and synthetic oil? According to Mobil, synthetic oil is superior to conventional oil for several reasons. It provides a higher quality base oil that protects your engine better, and if you use a synthetic oil, you can go longer between oil changes (although you won’t want to go too long).
Here are some motor oil brands that Jeep XJ owners report using. All of them are designed for high mileage vehicles:
One more thing—don’t forget to change your XJ’s oil filter whenever you change the oil.

How often to change oil on a 1998 Jeep XJ

If you’re using conventional oil, you’ll usually want to change it every 3,000 to 5,000 miles or every 3 months. If you’re using synthetic oil, you can wait every 7,500-10,000 miles. 
However, because your XJ is older, you will not want to wait until the 10,000-mile mark (even if you’re using synthetic oil). Instead, check your oil regularly and consider sticking to the every-3-month / 3,000-5,000 mile rule.
As your XJ ages, its engine begins to wear, and it uses more oil. This means your oil tends to get dirtier faster. 
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Check your oil and oil levels. Many XJ owners check their oil levels once or twice a month. When you check your oil, look for these issues that signal it’s time for an oil change: 
  • Dark brown or black oil 
  • Coarse or gritty feeling oil
  • A burning smell
  • Changes in your vehicle’s performance or unfamiliar noises

How to change your oil and oil filter

Before you change your oil, do some planning. Purchase 6 quarts of API certified 10W-30 synthetic oil and a new oil filter. You’ll also need a socket wrench, a drain pan to collect the used motor oil, and a filter wrench to remove the old oil filter.
Park your Jeep in a level area and secure it by putting on the parking brake and placing wheel chocks behind the wheels. Start your XJ’s engine and let it run for about 5 minutes. This will ensure the old oil flows more easily into your drain pan.
Shut off the engine, open the hood, and follow these steps: 
  • Locate and then remove the oil fill cap.
  • Place the drain pan underneath the oil drain bolt. (You’ll need to crawl underneath your XJ to do this.)
  • Remove the oil drain bolt and washer. At this point, the old oil should begin to drain into the drain pan
  • Use the filter wrench to take out the old oil filter while the oil continues to drain out. 
  • Install the new filter.
  • Using a new washer, replace the oil drain bolt. Then tighten the bolt to the recommended torque.
  • After pouring in the new oil, replace the oil fill cap.
Start your engine, checking for any leaks. After the engine has been running for a few minutes, stop and wait for three minutes. Then use the dipstick to check the oil level and add more if needed. 
Dispose of the old oil properly.  Never pour oil into the ground or place it in your trash. Instead, take your used oil to a recycling center that will accept it.  Or to any retailer who sells oil, such as AutoZone or Advance Auto Parts.

Don’t forget regular insurance policy maintenance

Jeeps are tough, reliable SUVs, which helps them last and hold
their value
. In fact, Kiplinger magazine praised the XJ as one of those vehicles that “refuse[s] to die.”
If you commit to keeping a regular
maintenance schedule
that includes oil changes, chances are you can drive your 1998 Jeep XJ into the 200,000+ mile club (if you’re not a member already!).
The same goes for car insurance. If you want to save the most money possible on your policy, you’ll want to review your coverage regularly and reshop for quotes about every six months.
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Then, once you’ve selected a policy, you can count on Jerry to perform regular reviews, so you’ll always know you are getting the best deal on insurance for your 1998 Jeep XJ. 
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