if maintain turbo or no turbo same oso lor..if the engine oil botol says 5k then 5k lar if 7k then 7k lor...is no more diff from an NA engine...the problem is when u have leakage or turbo drinks ur engine oil now thats is what u have to repair first...
i usually hear ppl say.."engine turbo have to change earlier bcoz oil heats up la,engine oil finish bcoz of turbo engine,have to use fully syn lar,minyak mau mahal laa and all that....note that mitsu manual don't state the price of ur engine oil....only the specs such as viscosity n working temp....
turbo engine no more diff wif NA if no leaking or turbo problem...all those maintainance mahal all that is all tipu semata-mata...or cari makan lebih....