BMW 7 Series: N63/N63B V8 Excessive Oil Consumption

The twin-turbocharged N63 (F01/F02, 2008-2015) and updated N63B (G11/G12, 2015-present) V8s are documented for abnormally high oil consumption, typically 1-2 litres per 1,000 km under normal use. Heat-soak from the centrally-mounted turbos (valley-mounted between cylinder banks) causes oil to carbonise on intake valves and pass the piston rings and valve stem seals during hot restarts. BMW issued a Customer Care Programme in Australia covering valve stem seals, valve cover gaskets, PCV system, oil separator, and ECU reflash, explicitly acknowledging the defect. Without remediation, catalytic converters and oxygen sensors suffer secondary damage from oil burning.

• Oil level drops 1-2L between 1,000 km service intervals
• Blue smoke from exhaust on cold start or hard acceleration
• Fouled or oil-contaminated spark plugs
• Catalytic converter damage or P0420/P0430 fault codes
• Oil consumption warning light activating frequently

1. 1

   Check oil level relative to last service date — any consumption over 0.5L/1000km is a red flag.

2. 2

   Inspect tailpipe for blue-tinged carbon deposits.

3. 3

   Pull spark plugs to check for oil fouling.

4. 4

   Request service history showing oil top-ups between scheduled changes.

5. 5

   Ask specifically whether BMW's Customer Care Programme repairs (valve stem seals, PCV system) have been performed.

Parts involved: Catalytic converter, PCV / oil separator, Rocker / valve cover.

$2,800 to $8,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Has the BMW Customer Care Programme (valve stem seals, PCV system) been completed?”
• “What is the typical oil consumption between services?”
• “Have the catalytic converters been replaced or tested recently?”
• “Are there any stored engine fault codes related to misfires or lean running?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.