thanks everyone.
the tyre pressures is good, and they are continental, so shouldn't because of the tyres i think.
i know the road got camber, but even it drive on a really flat surface that every car can go straight, it just can't.
he did a 4 wheels alignment 3 weeks ago at WESTATE AUTOBAHN in Newcastle Street, Perth.
we droped the car there and 3 hours later they call my friend siad the car is ready to pick up and it is all good. they didn't point out any thing at all...and the car still going to the left...
castor rod bushes haven't been changed. they can be contributed to this problem as well?
cheers,
ryan