I bought a used (2001) Proton Waja, and has been using it for the past 5 years. Due to her age, the normal wear and tear - I intend to have a major servicing on her engine that requires changing of pistons, all engine mountings, flushing of gear fluid, rewiring, etcetra.

By doing this, would it be wise and economical in the long run?

Affimatively, can I rely on EON Service Centre???