"VQ35DE is consuming oil, engine has 134,130 miles — about .5-1.5 quarts per 1000 miles. Replaced valve covers, gaskets, VTC solenoid gasket, cam covers... still burns oil."
The VQ35DE is widely known for significant oil consumption, particularly on 2005-2007 models. Owners report burning 0.5 to 1.5 quarts per 1,000 miles. The issue is linked to valve stem seals and piston ring wear. Early models (2003-2004) appear less severely affected according to community reports, though no model year is immune.
Low oil level between changes
Blue smoke from exhaust especially on startup or deceleration
Cardboard oil gallery gaskets used in early VQ35DE production degrade over time, causing internal oil pressure loss and potential oil starvation. A fix using updated OEM-spec gaskets from facelift versions is well documented in the community and on forums.
Low oil pressure warning light
Ticking or rattling noises at idle
Sudden oil pressure drop
Engine oil smell with no visible external leak
DIY: Hard
Valve Cover Gasket and Rear Main Seal Leaks€200-700 · 80,000-160,000 kmHIGH
Valve cover gaskets are a known wear item on the VQ35DE. NHTSA complaints and forum posts confirm oil dripping from the engine bay, with burnt oil smell entering the cabin through HVAC vents. The rear main seal also fails on higher-mileage units.
Burnt oil smell through air vents while driving
Visible oil drips under the engine bay
Oil on the underside of valve covers
Oil residue on exhaust manifolds
DIY: Moderate
Timing Chain Guide and Tensioner Wear€800-2,500 · 120,000-200,000 kmHIGH
Forum data highlights timing chain guides and chain tensioners as wear items on the VQ35DE. Oil gallery gasket failures can accelerate this wear by starving the chain of lubrication. Failure can result in chain jump and severe engine damage.
Rattling or slapping noise on cold start
Timing-related fault codes
Rough idle after cold start
Check engine light with cam timing codes
DIY: Hard
Head Gasket Failure (Coolant Contamination)€1,000-2,500 · 150,000-250,000 kmMODERATE
Forum data specifically for the VQ35DE mentions head gasket failure with coolant entering the oil. This is more likely on overheated or poorly maintained examples.
NHTSA complaints document the airbag warning light illuminating during highway driving without prior warning, not extinguishing until the vehicle is shut down. This indicates an SRS system fault that requires diagnosis.
Airbag / SRS warning light on dashboard
Light illuminates intermittently at highway speeds
Light resets only after engine off
DIY: Moderate
Electrical / Infotainment and No-Start Issues€100-500 · 60,000-150,000 kmLOW
NHTSA complaint documents a failed radio circuit board and a no-start condition in cold weather on the 2003 G35. These are isolated but noted electrical gremlins consistent with the age of the platform.
Radio failure or no audio
No-start in cold ambient temperatures
Intermittent electrical faults
DIY: Low
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Buying Checklist
Perform an oil consumption test: check level after exactly 1,500 km and record loss — reject if more than 0.5L consumed
Confirm oil gallery gasket replacement has been performed; ask for receipts or inspect repair records specifically for this job
Cold-start the engine and listen for at least 30 seconds for timing chain rattle before the oil pressure builds
Scan all ECU modules including SRS/airbag with an OBD2 tool — flag any active or stored fault codes
Inspect both valve covers and the rear of the engine block for oil seepage or fresh sealer indicating recent repair
Check the oil filler cap and dipstick for milky or creamy residue indicating coolant contamination
Service Reality
Community oil interval5,000 km
Oil specification5W-30 or 5W-40 API SN or higher; community recommends 5W-40 full synthetic for high-mileage units with oil consumption issues
Est. ownership cost (2yr)€1,500-4,500 over the first two years depending on deferred maintenance, oil consumption severity, and whether timing chain components require replacement
The VQ35DE in the G35 V35 is a fundamentally capable engine let down by well-documented oil consumption and oil gallery gasket issues that must be treated as certainties on any high-mileage example, not possibilities. Prioritise 2003-2004 model years over 2005-2007 as the community consistently reports lower oil consumption rates on earlier units. Budget immediately for oil gallery gaskets, valve cover gaskets, and a timing chain inspection regardless of what the seller claims has been done. Only buy if you can verify the oil consumption rate is below 0.5 litres per 1,500 km and all relevant gasket work has documented receipts.
Parts People Buy
VQ35DE Oil Gallery Gasket SetLink unavailable
Valve Cover Gasket Set VQ35DELink unavailable
Timing Chain Kit VQ35DELink unavailable
Rear Main Seal VQ35DELink unavailable
5W-40 Full Synthetic Engine OilLink unavailable
VQ35DE Valve Stem Seal SetLink unavailable
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