Mercedes-Benz FO108W engine

Lewis Hamilton recons that the Mercedes engine is the best formula one engine.

Technical Specification
Type Mercedes-Benz FO108W
Capacity 2.4 litres
Cylinders 8
Maximum rpm 18,000 (FIA regulatory limit for 2009)
Bank angle 90
Piston bore 98mm (FIA regulation)
No of valves 32
Weight 95kg (minimum FIA regulation weight)
Fuel Mobil High Performance Unleaded (5.75% bio fuel)
Lubricants Mobil 1

McLaren F1 to buy BMW F1 Engine ops

Mercedes plans new F1 engine factory

How much of a Mercedes F1 engine is Mercedes ?

Are there enough engines in F1 in 2010?