Opel Signum 2005 2.8 petrol service and maintenance

Engine oil

Engine oil capacity: 6.8 litres (7.2 quarts)
For regular oil change Opel Signum 2005 2.8 petrol takes approx. 6 litres of oil, 6.8 litres is total engine oil capacity.
Oil change interval is 15,000 km or one year, whichever comes first.
Recommended oil type (Oil Viscosity Classification SAE) is 5W-30, 5W-40

Air filter

Replacement interval for the air filter is 30,000 km.
After prolonged driving in particularly dusty conditions, it is advisable to check the condition of the air filter earlier and replace it if the filter is visibly dirty.

Fuel filter

Opel Signum 2.8 petrol fuel filter replacement interval: 60,000 km

Spark plugs

Recommended spark plugs change interval is 45,000 km.

Timing chain

There is no manufacturer specified replacement interval for the engine timing chain on Opel Signum 2005 2.8 petrol, expecting it to last until the engine is overhauled.
Based on real life experience, the Opel Signum 2005 2.8-V6 Turbo timing chain change interval is approximately 100,000 km as at this mileage it may become overstretched and require replacement, so it is recommended to check the condition of the chain periodically after this mileage is reached and replace the timing chain if it becomes excessively stretched or if unusual engine noises occur.

Serpentine (drive) belt

Opel Signum 2005 2.8-V6 Turbo serpentine or alternator belt replacement interval is 120,000 km.

Engine coolant

Engine coolant (antifreeze) recommended replacement interval for Opel Signum 2.8 petrol is 60,000 km or 3 years, whichever comes first.
Coolant capacity is 7.5 litres