Just an update. Check my tyre recently and ending up my tyre condition is very bad. So decided to change all 4 tyres to Hankook brand, complete balancing alignment, problem solved! Lucky it is not other major problems like steering rack etc.
Anyway, thanks all for the info and suggestion!
(good investment for incoming Raya holiday)
Which Hankook?

the next High Performance Challenge (HPC) event at Sepang track on the 30th November 2008 are now open for registration.