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Excessive Oil Consumption on my 2019 Q50 3.0t – VR30DDTT Engine

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Robert C. · rep 0 · May 22, 5:09 AM · 1 replies · solved · Question

Vehicle: 2019 Infiniti Q50 3.0t LUXE

Hey everyone,

I've got a 2019 Infiniti Q50 3.0t, and I've noticed it's consuming a significant amount of oil between oil changes. I'm talking about needing to add a quart or more every 2,000-3,000 miles. I don't see any obvious leaks on my driveway, and there's no excessive smoke from the exhaust that I can tell.

I'm running the recommended oil and sticking to the service intervals. Is this normal for the VR30DDTT engine, or should I be concerned? I've heard some chatter about these engines and oil consumption, but I'm not sure what's considered 'normal' versus a problem. What should I tell my dealer when I bring it in?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:09 AM

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ClearTheCode admin answer:

Excessive oil consumption on the VR30DDTT engine, found in your 2019 Infiniti Q50 3.0t, is a known concern for some owners. While some degree of oil consumption is normal for any engine, especially turbocharged ones, needing to add a quart every 2,000-3,000 miles is on the higher side and warrants investigation.

Here are potential causes and what to do:

  1. Turbocharger Seals: A common culprit for oil consumption in turbocharged engines is worn or failing turbocharger seals. Oil can leak past these seals into the exhaust or intake, where it's burned off, often without visible smoke unless the failure is severe.
  2. PCV System Issues: A clogged or malfunctioning Positive Crankcase Ventilation (PCV) system can lead to increased crankcase pressure, forcing oil past piston rings or valve stem seals.
  3. Valve Stem Seals: Worn valve stem seals can allow oil to seep into the combustion chambers, especially when the engine is decelerating or idling.
  4. Piston Rings: While less common in newer engines, worn or stuck piston rings can also lead to oil burning.
  5. Oil Type/Viscosity: Ensure you are using the exact oil viscosity and specification recommended by Infiniti (usually 0W-20 or 5W-30, depending on specific engine variant and region, with API SN or SP rating). Using incorrect oil can exacerbate consumption.

Diagnostic Codes: While oil consumption itself doesn't always trigger a direct OBD-II code, related issues might:

  • P0299: Turbocharger/Supercharger Underboost (if turbo seals are severely compromised affecting boost)
  • P0300: Random/Multiple Cylinder Misfire Detected (if oil fouling spark plugs)

When to See a Shop:

You should schedule an appointment with your Infiniti dealership. Be prepared to document your oil additions (dates, mileage, amount). The dealership will likely perform an oil consumption test, which involves topping off the oil, sealing the dipstick/fill cap, and having you return after a set mileage (e.g., 1,000 miles) to measure the consumption. This is the standard procedure to determine if consumption is outside of manufacturer specifications. There have been TSBs related to VR30DDTT oil consumption, so ask them to check for any applicable service bulletins.

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