WARNINGS:
Stop refuelling after the fuel nozzle stops the second time. Additional fuel will fill the expansion space in the fuel tank which could lead to fuel overflowing. Fuel spillage could be hazardous to other road users.
Do not use any kind of flames or heat near the fuel system. The fuel system is under pressure. There is a risk of injury if the fuel system is leaking.
Ford Focus Technical specifications
Vehicle fluids
1 Providing it meets the specification defined by WSS-M2C913-C, you can also
use
Ford Engine Oil or an alternative engine oil.
2 On vehicles with a 2.5L Duratec-RS engine, use only this oil.
Topping up the oil: If you are unable to find an oil that meets the
specification ...