@Valhalla
How absurd!
Since when does Honda make coolant, power steering, gear and engine oil for it to be warranted 'genuine'???
Sir you can read the Honda Civic 2001-05 Owner's manual page 213-222.
That also goes true for the new 2006-2010 Civic.
They do make all oils/lubricants all over the world thorough 3rd party manufacturers.
One can loose the power steering, radiator, transmission and brake system if non approved oil is used, many of the 01-05 Civics are suffering from a malfunctioning/leaking power steering and rusty radiators.
@xain91
Sir you can use one brand for your car, ZIC, they make power steering fluid and brake fluids too and they are all good.
Fuel additives are not at all necessary.
Just use petrol from a shell pump.