2016 Isuzu NQR Oil Capacity & Filter Specs

The 2016 Isuzu NQR takes 8.5 quarts (8.0 liters) of 5W-30 engine oil meeting the API CJ-4 specification for its 5.2L 4HK1-TC diesel engine.

Quick Answer

• Oil Capacity: 8.5 US Quarts (8.0 Liters)
• Recommended Oil Weight: 5W-30
• Oil Specification: API CJ-4
• OEM Oil Filter: Isuzu 8-98075778-0
• Aftermarket Oil Filter Cross-References:
  • Fram: CH10787
  • Wix: 57920
  • Mobil 1: M1C-251

Capacity by Engine Option

Oil Change Interval

Regular oil changes are crucial for the longevity and performance of your 2016 Isuzu NQR, especially given its commercial application.

• Normal Duty: Isuzu generally recommends an oil change every 10,000 miles or 12 months, whichever comes first.
• Severe Duty: For vehicles operating under severe conditions (e.g., frequent short trips, heavy loads, dusty environments, extensive idling, extreme temperatures), the oil change interval should be reduced to 5,000 miles or 6 months, whichever comes first.

Always refer to your vehicle's owner's manual for the most accurate and up-to-date maintenance schedules.

Drain Plug Torque

The oil drain plug on the 2016 Isuzu NQR should be torqued to 33.2 lb-ft (45 Nm). It is highly recommended to replace the drain plug gasket or crush washer with each oil change to prevent leaks. Consult your dealer for the correct replacement gasket/washer.

How to Change the Oil

Changing the oil on your Isuzu NQR involves a few key steps:

1. Warm Up Engine: Drive the truck for a few minutes to bring the oil to operating temperature, ensuring it drains more easily.
2. Lift and Secure: Safely lift and support the front of the vehicle using appropriate jack stands or ramps if needed to access the drain plug and oil filter. Always prioritize safety.
3. Locate and Drain: Place a suitable drain pan underneath the oil pan, then carefully remove the oil drain plug. Allow all the old oil to drain completely.
4. Replace Filter: Locate and remove the old oil filter. Apply a thin coat of new oil to the gasket of the new filter before threading it on by hand. Tighten according to the filter manufacturer's instructions, typically by hand until snug, then an additional 3/4 to 1 full turn.
5. Refill Oil: Replace the drain plug with a new gasket/crush washer and torque it to the specified setting. Remove the oil filler cap and pour in the fresh oil, starting with slightly less than the full capacity.
6. Check Level: Start the engine and let it run for a minute to circulate the new oil. Shut off the engine, wait a few minutes, then check the oil level with the dipstick. Add more oil gradually until the level is within the safe range.
7. Reset Maintenance Light: Consult your owner's manual for instructions on how to reset the oil life monitor or maintenance light.
8. Dispose of Oil: Properly dispose of used oil and filter at an authorized recycling center.

Common Issues / Tips

• DPF (Diesel Particulate Filter) Regeneration: Commercial diesel engines like the 4HK1-TC in the NQR rely on the correct oil specification (API CJ-4 in this case) to prevent premature clogging of the DPF. Using an incorrect oil can lead to costly DPF issues.
• Oil Consumption: Some commercial diesel engines may consume a small amount of oil between changes. Regularly check your oil level, especially with the higher mileage typical of these vehicles.
• Fuel Dilution: In diesel engines, short trips or excessive idling can lead to fuel dilution in the engine oil, which degrades its lubricating properties. Adhering to severe duty oil change intervals is crucial if your NQR operates under such conditions.
• Accessibility: The oil filter and drain plug are generally accessible. However, ensure you have appropriate tools, including a large enough drain pan for the 8.5 quarts.
• Cooling System Integration: The oil cooler often shares engine coolant. If you notice persistent oil in your coolant or vice-versa, it could indicate an issue with the oil cooler.

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