2021 Isuzu NQR — Oil Capacity & Filter

The 2021 Isuzu NQR takes 8.5 quarts (8.0 liters) of CJ-4 or CK-4 heavy-duty diesel engine oil, typically 5W-30 or 10W-30 depending on ambient temperature.

Quick answer

• Oil Capacity: 8.5 quarts (8.0 liters)
• Recommended Oil Weight: 5W-30 or 10W-30 (consult owner's manual for temperature-specific recommendations)
• Oil Spec: API CJ-4 or CK-4 heavy-duty diesel engine oil
• OEM Oil Filter Part Number: 8-98270054-0
• Aftermarket Oil Filter Cross-References:
  • Fram: CH11910
  • Wix: 57077
  • Mobil 1: M1C-451A

Capacity by engine option

The 2021 Isuzu NQR is equipped with the 5.2L 4HK1-TC turbocharged intercooled diesel engine.

Oil change interval

Maintaining consistent oil change intervals is crucial for the longevity and performance of your 2021 Isuzu NQR's diesel engine.

• Normal Duty: Typically every 10,000 miles or 12 months, whichever comes first.
• Severe Duty: If your NQR operates under severe conditions (frequent short trips, heavy loads, dusty environments, extensive idling, or extreme temperatures), it is recommended to shorten the oil change interval to 5,000 miles or 6 months.

Always refer to your vehicle's owner's manual for the most accurate and up-to-date recommendations based on your specific operating conditions.

Drain plug torque

The oil drain plug on the 2021 Isuzu NQR should be torqued to 33 lb-ft (45 Nm). It is highly recommended to replace the drain plug crush washer with every oil change to ensure a proper seal and prevent leaks. Consult your dealer for the correct crush washer part number.

How to change the oil

1. Warm up the engine: Drive the vehicle for a few minutes to bring the oil to operating temperature, allowing it to drain more easily.
2. Park and secure: Park the truck on a level surface, engage the parking brake, and place wheel chocks for safety. For easier access, consider using ramps or a lift.
3. Locate drain plug: Place a suitable oil drain pan beneath the oil pan. Identify the drain plug.
4. Drain oil: Carefully remove the drain plug (using a wrench) and allow all the old oil to drain completely. Be mindful of hot oil.
5. Replace drain plug: Once drained, reinstall the drain plug with a new crush washer and tighten to the specified torque of 33 lb-ft (45 Nm).
6. Remove old filter: Locate the oil filter. Use an oil filter wrench to remove the old filter. Be prepared for a small amount of oil to spill.
7. Prepare new filter: Apply a thin coat of new engine oil to the rubber gasket of the new oil filter.
8. Install new filter: Thread the new oil filter on by hand until the gasket makes contact, then tighten an additional 3/4 to 1 full turn (or according to filter manufacturer instructions). Do not overtighten.
9. Add new oil: Carefully fill the engine with 8.5 quarts (8.0 liters) of the recommended CJ-4 or CK-4 diesel engine oil.
10. Check oil level: Start the engine and let it run for a few minutes to circulate the new oil. Turn off the engine, wait a few minutes for the oil to settle, then check the oil level using the dipstick. Top off if necessary.
11. Check for leaks: Inspect the drain plug and oil filter area for any signs of leaks.
12. Dispose of old oil: Properly dispose of the used oil and filter at an authorized recycling center.

Common issues / tips

• DPF Regeneration: The 2021 Isuzu NQR, like other modern diesels, is equipped with a Diesel Particulate Filter (DPF). Using the correct CJ-4 or CK-4 low-ash oil specification is critical to prevent premature DPF clogging and costly repairs. Never use oils not meeting this specification.
• Fuel Dilution: Pay attention to your oil level and appearance between changes. Excessive fuel dilution (a common issue in diesels, especially with frequent short trips) can degrade oil performance. If the oil level seems to be rising or smells strongly of diesel, consult a mechanic.
• Aftermarket Filters: While aftermarket filters are available, ensure they meet or exceed OEM specifications for proper filtration and fitment, especially for heavy-duty commercial applications like the NQR.
• Monitoring System: Familiarize yourself with the vehicle's maintenance monitoring system (if equipped), which can provide reminders for service intervals.

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