I owned a 2004 Optra 1.6L which i bought brand new from the casa in 2004. The chevy dealers have a promo up to Dec 31, 2010 for replacing the timing belt and tensioner for only P5.500+. My question is, would you have it changed considering that it has only runned for 30,200km?. PLEASE ADVISE, Tsikoteers. thanks